From b53cf149ad8d7c46572e4567ca949b4f82ebb22c Mon Sep 17 00:00:00 2001
From: eregon <eregon@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 3 Aug 2018 16:19:40 +0000
Subject: Update to ruby/spec@9be7c7e

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64180 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 spec/ruby/README.md                                |   7 +
 spec/ruby/command_line/rubyopt_spec.rb             |   2 +-
 spec/ruby/core/array/reject_spec.rb                |  25 ++
 spec/ruby/core/binding/eval_spec.rb                |  60 +++-
 spec/ruby/core/binding/fixtures/classes.rb         |  12 +
 spec/ruby/core/binding/location_spec.rb            |  46 ---
 spec/ruby/core/enumerable/sort_by_spec.rb          |   7 +
 spec/ruby/core/io/read_spec.rb                     |   4 +
 spec/ruby/core/io/shared/write.rb                  |   4 +-
 spec/ruby/core/kernel/__dir___spec.rb              |   7 +
 spec/ruby/core/kernel/autoload_spec.rb             |  11 +-
 spec/ruby/core/kernel/fixtures/autoload_c.rb       |   5 -
 spec/ruby/core/kernel/require_relative_spec.rb     |  40 +++
 spec/ruby/core/kernel/require_spec.rb              |   2 -
 spec/ruby/core/kernel/shared/require.rb            |  76 ++++-
 spec/ruby/core/module/autoload_spec.rb             | 307 +++++++++++++++++--
 spec/ruby/core/module/const_get_spec.rb            |  21 ++
 .../ruby/core/module/fixtures/autoload_callback.rb |   2 +
 .../module/fixtures/autoload_during_autoload.rb    |   7 +
 .../module/fixtures/autoload_during_require.rb     |   4 +
 .../core/module/fixtures/autoload_exception.rb     |   3 +
 spec/ruby/core/module/fixtures/autoload_nested.rb  |   8 +
 spec/ruby/core/module/fixtures/autoload_o.rb       |   1 +
 spec/ruby/core/module/fixtures/autoload_raise.rb   |   2 +
 spec/ruby/core/module/fixtures/autoload_scope.rb   |   8 -
 .../core/module/fixtures/constants_autoload.rb     |   6 +
 .../core/module/fixtures/constants_autoload_a.rb   |   2 +
 .../core/module/fixtures/constants_autoload_b.rb   |   2 +
 .../core/module/fixtures/constants_autoload_c.rb   |   3 +
 .../core/module/fixtures/constants_autoload_d.rb   |   4 +
 spec/ruby/core/module/initialize_copy_spec.rb      |   8 +
 spec/ruby/core/signal/fixtures/trap_all.rb         |   8 +
 spec/ruby/core/signal/trap_spec.rb                 |  43 +++
 spec/ruby/core/string/force_encoding_spec.rb       |  20 ++
 .../backtrace/location/absolute_path_spec.rb       |  38 +++
 .../backtrace/location/fixtures/absolute_path.rb   |   4 +
 spec/ruby/core/time/localtime_spec.rb              |   2 +-
 .../ruby/fixtures/code/load_fixture_and__FILE__.rb |   1 +
 spec/ruby/language/array_spec.rb                   |   7 +
 spec/ruby/language/constants_spec.rb               |  19 +-
 spec/ruby/language/fixtures/array.rb               |  21 ++
 spec/ruby/language/optional_assignments_spec.rb    |  22 ++
 spec/ruby/library/date/iso8601_spec.rb             |  37 +++
 spec/ruby/library/date/parse_spec.rb               |   5 +
 spec/ruby/library/socket/addrinfo/afamily_spec.rb  |   5 +-
 spec/ruby/library/socket/addrinfo/bind_spec.rb     |   3 +-
 .../ruby/library/socket/addrinfo/canonname_spec.rb |  12 +-
 .../library/socket/addrinfo/connect_from_spec.rb   |  75 +++++
 spec/ruby/library/socket/addrinfo/connect_spec.rb  |  35 +++
 .../library/socket/addrinfo/connect_to_spec.rb     |  75 +++++
 .../socket/addrinfo/family_addrinfo_spec.rb        | 115 +++++++
 spec/ruby/library/socket/addrinfo/foreach_spec.rb  |   9 +
 .../library/socket/addrinfo/getaddrinfo_spec.rb    |  88 ++++++
 .../library/socket/addrinfo/getnameinfo_spec.rb    |  44 +++
 .../library/socket/addrinfo/initialize_spec.rb     | 340 ++++++++++++++++++++-
 .../socket/addrinfo/inspect_sockaddr_spec.rb       |  55 +++-
 spec/ruby/library/socket/addrinfo/inspect_spec.rb  |  65 ++++
 .../library/socket/addrinfo/ip_address_spec.rb     |  55 +++-
 spec/ruby/library/socket/addrinfo/ip_port_spec.rb  |   5 +-
 spec/ruby/library/socket/addrinfo/ip_spec.rb       |  36 ++-
 .../ruby/library/socket/addrinfo/ip_unpack_spec.rb |   5 +-
 .../library/socket/addrinfo/ipv4_loopback_spec.rb  |  17 +-
 .../library/socket/addrinfo/ipv4_multicast_spec.rb |  39 +--
 .../library/socket/addrinfo/ipv4_private_spec.rb   |  14 +-
 spec/ruby/library/socket/addrinfo/ipv4_spec.rb     |   5 +-
 .../library/socket/addrinfo/ipv6_linklocal_spec.rb |  18 ++
 .../library/socket/addrinfo/ipv6_loopback_spec.rb  |   9 +-
 .../library/socket/addrinfo/ipv6_mc_global_spec.rb |  20 ++
 .../socket/addrinfo/ipv6_mc_linklocal_spec.rb      |  19 ++
 .../socket/addrinfo/ipv6_mc_nodelocal_spec.rb      |  18 ++
 .../socket/addrinfo/ipv6_mc_orglocal_spec.rb       |  18 ++
 .../socket/addrinfo/ipv6_mc_sitelocal_spec.rb      |  18 ++
 .../library/socket/addrinfo/ipv6_multicast_spec.rb |  26 +-
 .../library/socket/addrinfo/ipv6_sitelocal_spec.rb |  18 ++
 spec/ruby/library/socket/addrinfo/ipv6_spec.rb     |   5 +-
 .../library/socket/addrinfo/ipv6_to_ipv4_spec.rb   |  66 ++++
 .../socket/addrinfo/ipv6_unique_local_spec.rb      |  18 ++
 .../socket/addrinfo/ipv6_unspecified_spec.rb       |  15 +
 .../library/socket/addrinfo/ipv6_v4compat_spec.rb  |  20 ++
 .../library/socket/addrinfo/ipv6_v4mapped_spec.rb  |  20 ++
 spec/ruby/library/socket/addrinfo/listen_spec.rb   |  34 +++
 .../library/socket/addrinfo/marshal_dump_spec.rb   |  82 +++++
 .../library/socket/addrinfo/marshal_load_spec.rb   |  35 +++
 spec/ruby/library/socket/addrinfo/pfamily_spec.rb  |  11 +-
 spec/ruby/library/socket/addrinfo/protocol_spec.rb |  28 +-
 .../library/socket/addrinfo/shared/to_sockaddr.rb  |  24 +-
 spec/ruby/library/socket/addrinfo/socktype_spec.rb |  27 +-
 spec/ruby/library/socket/addrinfo/tcp_spec.rb      |  42 ++-
 spec/ruby/library/socket/addrinfo/to_s_spec.rb     |   3 +-
 .../library/socket/addrinfo/to_sockaddr_spec.rb    |   3 +-
 spec/ruby/library/socket/addrinfo/udp_spec.rb      |  42 ++-
 .../ruby/library/socket/addrinfo/unix_path_spec.rb |  19 +-
 spec/ruby/library/socket/addrinfo/unix_spec.rb     |  39 ++-
 .../library/socket/ancillarydata/cmsg_is_spec.rb   |  31 ++
 .../ruby/library/socket/ancillarydata/data_spec.rb |   9 +
 .../library/socket/ancillarydata/family_spec.rb    |   9 +
 .../socket/ancillarydata/initialize_spec.rb        | 282 +++++++++++++++++
 spec/ruby/library/socket/ancillarydata/int_spec.rb |  43 +++
 .../socket/ancillarydata/ip_pktinfo_spec.rb        | 145 +++++++++
 .../socket/ancillarydata/ipv6_pktinfo_addr_spec.rb |  11 +
 .../ancillarydata/ipv6_pktinfo_ifindex_spec.rb     |  11 +
 .../socket/ancillarydata/ipv6_pktinfo_spec.rb      |  89 ++++++
 .../library/socket/ancillarydata/level_spec.rb     |   9 +
 .../ruby/library/socket/ancillarydata/type_spec.rb |   9 +
 .../socket/ancillarydata/unix_rights_spec.rb       |  59 ++++
 .../library/socket/basicsocket/close_read_spec.rb  |  10 +-
 .../library/socket/basicsocket/close_write_spec.rb |  10 +-
 .../socket/basicsocket/connect_address_spec.rb     | 150 +++++++++
 .../basicsocket/do_not_reverse_lookup_spec.rb      |   2 +-
 .../ruby/library/socket/basicsocket/for_fd_spec.rb |  23 +-
 .../library/socket/basicsocket/getpeereid_spec.rb  |  36 +++
 .../library/socket/basicsocket/getpeername_spec.rb |   7 +-
 .../library/socket/basicsocket/getsockname_spec.rb |   4 +-
 .../library/socket/basicsocket/getsockopt_spec.rb  | 144 ++++++++-
 spec/ruby/library/socket/basicsocket/ioctl_spec.rb |   3 +-
 .../socket/basicsocket/recv_nonblock_spec.rb       |  64 +++-
 spec/ruby/library/socket/basicsocket/recv_spec.rb  |  67 +++-
 .../socket/basicsocket/recvmsg_nonblock_spec.rb    | 204 +++++++++++++
 .../library/socket/basicsocket/recvmsg_spec.rb     | 197 ++++++++++++
 spec/ruby/library/socket/basicsocket/send_spec.rb  | 131 +++++++-
 .../socket/basicsocket/sendmsg_nonblock_spec.rb    | 104 +++++++
 .../library/socket/basicsocket/sendmsg_spec.rb     | 111 +++++++
 .../library/socket/basicsocket/setsockopt_spec.rb  | 123 +++++++-
 .../library/socket/basicsocket/shutdown_spec.rb    | 153 +++++++++-
 .../library/socket/constants/constants_spec.rb     |  16 +-
 spec/ruby/library/socket/fixtures/classes.rb       |  65 +++-
 spec/ruby/library/socket/ipsocket/addr_spec.rb     |  65 +++-
 .../library/socket/ipsocket/getaddress_spec.rb     |   4 +-
 spec/ruby/library/socket/ipsocket/peeraddr_spec.rb |  68 ++++-
 spec/ruby/library/socket/ipsocket/recvfrom_spec.rb |  55 +++-
 spec/ruby/library/socket/option/bool_spec.rb       |  10 +-
 spec/ruby/library/socket/option/initialize_spec.rb |  83 +++++
 spec/ruby/library/socket/option/inspect_spec.rb    |   3 +-
 spec/ruby/library/socket/option/int_spec.rb        |  23 +-
 spec/ruby/library/socket/option/linger_spec.rb     |  16 +-
 spec/ruby/library/socket/option/new_spec.rb        |   2 +-
 spec/ruby/library/socket/shared/pack_sockaddr.rb   |  42 ++-
 spec/ruby/library/socket/shared/recv_nonblock.rb   |  52 ----
 spec/ruby/library/socket/shared/socketpair.rb      | 115 +++++++
 .../ruby/library/socket/socket/accept_loop_spec.rb |  80 +++++
 .../library/socket/socket/accept_nonblock_spec.rb  | 107 ++++++-
 spec/ruby/library/socket/socket/accept_spec.rb     | 122 +++++++-
 spec/ruby/library/socket/socket/bind_spec.rb       |  71 ++++-
 .../library/socket/socket/connect_nonblock_spec.rb |  56 +++-
 spec/ruby/library/socket/socket/connect_spec.rb    |  48 ++-
 spec/ruby/library/socket/socket/for_fd_spec.rb     |   3 +-
 .../ruby/library/socket/socket/getaddrinfo_spec.rb | 279 ++++++++++++++++-
 .../library/socket/socket/gethostbyaddr_spec.rb    | 121 +++++++-
 .../library/socket/socket/gethostbyname_spec.rb    | 124 +++++++-
 .../ruby/library/socket/socket/gethostname_spec.rb |   2 +-
 spec/ruby/library/socket/socket/getifaddrs_spec.rb | 108 +++++++
 .../ruby/library/socket/socket/getnameinfo_spec.rb |  94 +++++-
 .../library/socket/socket/getservbyname_spec.rb    |  10 +-
 .../library/socket/socket/getservbyport_spec.rb    |  23 ++
 spec/ruby/library/socket/socket/initialize_spec.rb |  87 ++++++
 .../library/socket/socket/ip_address_list_spec.rb  |  50 +++
 .../library/socket/socket/ipv6only_bang_spec.rb    |  17 ++
 spec/ruby/library/socket/socket/listen_spec.rb     |  50 ++-
 .../library/socket/socket/local_address_spec.rb    |  43 +++
 spec/ruby/library/socket/socket/new_spec.rb        |   2 +-
 .../library/socket/socket/pack_sockaddr_in_spec.rb |   2 +-
 .../library/socket/socket/pack_sockaddr_un_spec.rb |   2 +-
 spec/ruby/library/socket/socket/pair_spec.rb       |   2 +-
 .../socket/socket/recvfrom_nonblock_spec.rb        | 110 ++++++-
 spec/ruby/library/socket/socket/recvfrom_spec.rb   |  92 +++++-
 .../library/socket/socket/remote_address_spec.rb   |  54 ++++
 .../ruby/library/socket/socket/sockaddr_in_spec.rb |   2 +-
 .../ruby/library/socket/socket/sockaddr_un_spec.rb |   2 +-
 spec/ruby/library/socket/socket/socket_spec.rb     |   2 +-
 spec/ruby/library/socket/socket/socketpair_spec.rb |   2 +-
 spec/ruby/library/socket/socket/sysaccept_spec.rb  |  93 +++++-
 .../library/socket/socket/tcp_server_loop_spec.rb  |  47 +++
 .../socket/socket/tcp_server_sockets_spec.rb       |  39 +++
 spec/ruby/library/socket/socket/tcp_spec.rb        |  70 +++++
 .../socket/socket/udp_server_loop_on_spec.rb       |  47 +++
 .../library/socket/socket/udp_server_loop_spec.rb  |  47 +++
 .../library/socket/socket/udp_server_recv_spec.rb  |  32 ++
 .../socket/socket/udp_server_sockets_spec.rb       |  39 +++
 .../library/socket/socket/unix_server_loop_spec.rb |  51 ++++
 .../socket/socket/unix_server_socket_spec.rb       |  48 +++
 spec/ruby/library/socket/socket/unix_spec.rb       |  45 +++
 .../socket/socket/unpack_sockaddr_in_spec.rb       |  27 +-
 .../socket/socket/unpack_sockaddr_un_spec.rb       |   6 +-
 spec/ruby/library/socket/spec_helper.rb            |  16 +
 .../socket/tcpserver/accept_nonblock_spec.rb       |  38 ++-
 spec/ruby/library/socket/tcpserver/accept_spec.rb  |  37 ++-
 spec/ruby/library/socket/tcpserver/gets_spec.rb    |   2 +-
 .../library/socket/tcpserver/initialize_spec.rb    |  99 ++++++
 spec/ruby/library/socket/tcpserver/listen_spec.rb  |  26 +-
 spec/ruby/library/socket/tcpserver/new_spec.rb     |   4 +-
 .../library/socket/tcpserver/sysaccept_spec.rb     |  40 ++-
 .../library/socket/tcpsocket/gethostbyname_spec.rb |  62 +++-
 .../library/socket/tcpsocket/initialize_spec.rb    |  61 ++++
 .../library/socket/tcpsocket/local_address_spec.rb |  73 +++++
 .../socket/tcpsocket/partially_closable_spec.rb    |   2 +-
 .../library/socket/tcpsocket/recv_nonblock_spec.rb |   2 +-
 spec/ruby/library/socket/tcpsocket/recv_spec.rb    |  28 ++
 .../socket/tcpsocket/remote_address_spec.rb        |  72 +++++
 .../library/socket/tcpsocket/setsockopt_spec.rb    |   2 +-
 spec/ruby/library/socket/tcpsocket/shared/new.rb   |   2 +-
 spec/ruby/library/socket/udpsocket/bind_spec.rb    |  49 ++-
 spec/ruby/library/socket/udpsocket/connect_spec.rb |  35 +++
 .../library/socket/udpsocket/initialize_spec.rb    |  36 +++
 spec/ruby/library/socket/udpsocket/inspect_spec.rb |  25 ++
 .../library/socket/udpsocket/local_address_spec.rb |  80 +++++
 spec/ruby/library/socket/udpsocket/new_spec.rb     |   2 +-
 spec/ruby/library/socket/udpsocket/open_spec.rb    |   2 +-
 .../socket/udpsocket/recvfrom_nonblock_spec.rb     |  88 ++++++
 .../socket/udpsocket/remote_address_spec.rb        |  79 +++++
 spec/ruby/library/socket/udpsocket/send_spec.rb    |  80 ++++-
 spec/ruby/library/socket/udpsocket/write_spec.rb   |   2 +-
 .../socket/unixserver/accept_nonblock_spec.rb      |  58 +++-
 spec/ruby/library/socket/unixserver/accept_spec.rb |  58 +++-
 spec/ruby/library/socket/unixserver/for_fd_spec.rb |   2 +-
 .../library/socket/unixserver/initialize_spec.rb   |  28 ++
 spec/ruby/library/socket/unixserver/listen_spec.rb |  21 ++
 spec/ruby/library/socket/unixserver/new_spec.rb    |   2 +-
 spec/ruby/library/socket/unixserver/open_spec.rb   |   3 +-
 spec/ruby/library/socket/unixserver/shared/new.rb  |   3 +-
 .../library/socket/unixserver/sysaccept_spec.rb    |  52 ++++
 spec/ruby/library/socket/unixsocket/addr_spec.rb   |  12 +-
 .../library/socket/unixsocket/initialize_spec.rb   |  38 +++
 .../ruby/library/socket/unixsocket/inspect_spec.rb |   2 +-
 .../socket/unixsocket/local_address_spec.rb        |  45 +++
 spec/ruby/library/socket/unixsocket/new_spec.rb    |   2 +-
 spec/ruby/library/socket/unixsocket/open_spec.rb   |   3 +-
 spec/ruby/library/socket/unixsocket/pair_spec.rb   |   2 +-
 .../socket/unixsocket/partially_closable_spec.rb   |   2 +-
 spec/ruby/library/socket/unixsocket/path_spec.rb   |   2 +-
 .../library/socket/unixsocket/peeraddr_spec.rb     |   2 +-
 .../ruby/library/socket/unixsocket/recv_io_spec.rb |  47 ++-
 .../library/socket/unixsocket/recvfrom_spec.rb     |  54 +++-
 .../socket/unixsocket/remote_address_spec.rb       |  45 +++
 .../ruby/library/socket/unixsocket/send_io_spec.rb |  25 +-
 spec/ruby/library/socket/unixsocket/shared/new.rb  |   2 +-
 .../library/socket/unixsocket/socketpair_spec.rb   |  40 +++
 spec/ruby/library/weakref/allocate_spec.rb         |   8 +
 spec/ruby/library/weakref/new_spec.rb              |  13 +
 spec/ruby/library/zlib/deflate/deflate_spec.rb     |   2 +-
 spec/ruby/library/zlib/deflate_spec.rb             |   8 +
 spec/ruby/library/zlib/inflate_spec.rb             |   8 +
 spec/ruby/optional/capi/encoding_spec.rb           |  18 +-
 spec/ruby/optional/capi/ext/encoding_spec.c        |   2 -
 spec/ruby/optional/capi/ext/rubyspec.h             |   6 +
 spec/ruby/optional/capi/module_spec.rb             |  24 ++
 spec/ruby/security/cve_2010_1330_spec.rb           |  21 ++
 246 files changed, 9104 insertions(+), 544 deletions(-)
 delete mode 100644 spec/ruby/core/binding/location_spec.rb
 delete mode 100644 spec/ruby/core/kernel/fixtures/autoload_c.rb
 create mode 100644 spec/ruby/core/module/fixtures/autoload_callback.rb
 create mode 100644 spec/ruby/core/module/fixtures/autoload_during_autoload.rb
 create mode 100644 spec/ruby/core/module/fixtures/autoload_during_require.rb
 create mode 100644 spec/ruby/core/module/fixtures/autoload_exception.rb
 create mode 100644 spec/ruby/core/module/fixtures/autoload_nested.rb
 create mode 100644 spec/ruby/core/module/fixtures/autoload_raise.rb
 delete mode 100644 spec/ruby/core/module/fixtures/autoload_scope.rb
 create mode 100644 spec/ruby/core/module/fixtures/constants_autoload.rb
 create mode 100644 spec/ruby/core/module/fixtures/constants_autoload_a.rb
 create mode 100644 spec/ruby/core/module/fixtures/constants_autoload_b.rb
 create mode 100644 spec/ruby/core/module/fixtures/constants_autoload_c.rb
 create mode 100644 spec/ruby/core/module/fixtures/constants_autoload_d.rb
 create mode 100644 spec/ruby/core/signal/fixtures/trap_all.rb
 create mode 100644 spec/ruby/core/thread/backtrace/location/fixtures/absolute_path.rb
 create mode 100644 spec/ruby/fixtures/code/load_fixture_and__FILE__.rb
 create mode 100644 spec/ruby/library/date/iso8601_spec.rb
 create mode 100644 spec/ruby/library/socket/addrinfo/connect_from_spec.rb
 create mode 100644 spec/ruby/library/socket/addrinfo/connect_spec.rb
 create mode 100644 spec/ruby/library/socket/addrinfo/connect_to_spec.rb
 create mode 100644 spec/ruby/library/socket/addrinfo/family_addrinfo_spec.rb
 create mode 100644 spec/ruby/library/socket/addrinfo/foreach_spec.rb
 create mode 100644 spec/ruby/library/socket/addrinfo/getaddrinfo_spec.rb
 create mode 100644 spec/ruby/library/socket/addrinfo/getnameinfo_spec.rb
 create mode 100644 spec/ruby/library/socket/addrinfo/inspect_spec.rb
 create mode 100644 spec/ruby/library/socket/addrinfo/ipv6_linklocal_spec.rb
 create mode 100644 spec/ruby/library/socket/addrinfo/ipv6_mc_global_spec.rb
 create mode 100644 spec/ruby/library/socket/addrinfo/ipv6_mc_linklocal_spec.rb
 create mode 100644 spec/ruby/library/socket/addrinfo/ipv6_mc_nodelocal_spec.rb
 create mode 100644 spec/ruby/library/socket/addrinfo/ipv6_mc_orglocal_spec.rb
 create mode 100644 spec/ruby/library/socket/addrinfo/ipv6_mc_sitelocal_spec.rb
 create mode 100644 spec/ruby/library/socket/addrinfo/ipv6_sitelocal_spec.rb
 create mode 100644 spec/ruby/library/socket/addrinfo/ipv6_to_ipv4_spec.rb
 create mode 100644 spec/ruby/library/socket/addrinfo/ipv6_unique_local_spec.rb
 create mode 100644 spec/ruby/library/socket/addrinfo/ipv6_unspecified_spec.rb
 create mode 100644 spec/ruby/library/socket/addrinfo/ipv6_v4compat_spec.rb
 create mode 100644 spec/ruby/library/socket/addrinfo/ipv6_v4mapped_spec.rb
 create mode 100644 spec/ruby/library/socket/addrinfo/listen_spec.rb
 create mode 100644 spec/ruby/library/socket/addrinfo/marshal_dump_spec.rb
 create mode 100644 spec/ruby/library/socket/addrinfo/marshal_load_spec.rb
 create mode 100644 spec/ruby/library/socket/ancillarydata/cmsg_is_spec.rb
 create mode 100644 spec/ruby/library/socket/ancillarydata/data_spec.rb
 create mode 100644 spec/ruby/library/socket/ancillarydata/family_spec.rb
 create mode 100644 spec/ruby/library/socket/ancillarydata/initialize_spec.rb
 create mode 100644 spec/ruby/library/socket/ancillarydata/int_spec.rb
 create mode 100644 spec/ruby/library/socket/ancillarydata/ip_pktinfo_spec.rb
 create mode 100644 spec/ruby/library/socket/ancillarydata/ipv6_pktinfo_addr_spec.rb
 create mode 100644 spec/ruby/library/socket/ancillarydata/ipv6_pktinfo_ifindex_spec.rb
 create mode 100644 spec/ruby/library/socket/ancillarydata/ipv6_pktinfo_spec.rb
 create mode 100644 spec/ruby/library/socket/ancillarydata/level_spec.rb
 create mode 100644 spec/ruby/library/socket/ancillarydata/type_spec.rb
 create mode 100644 spec/ruby/library/socket/ancillarydata/unix_rights_spec.rb
 create mode 100644 spec/ruby/library/socket/basicsocket/connect_address_spec.rb
 create mode 100644 spec/ruby/library/socket/basicsocket/getpeereid_spec.rb
 create mode 100644 spec/ruby/library/socket/basicsocket/recvmsg_nonblock_spec.rb
 create mode 100644 spec/ruby/library/socket/basicsocket/recvmsg_spec.rb
 create mode 100644 spec/ruby/library/socket/basicsocket/sendmsg_nonblock_spec.rb
 create mode 100644 spec/ruby/library/socket/basicsocket/sendmsg_spec.rb
 create mode 100644 spec/ruby/library/socket/option/initialize_spec.rb
 delete mode 100644 spec/ruby/library/socket/shared/recv_nonblock.rb
 create mode 100644 spec/ruby/library/socket/socket/accept_loop_spec.rb
 create mode 100644 spec/ruby/library/socket/socket/getifaddrs_spec.rb
 create mode 100644 spec/ruby/library/socket/socket/getservbyport_spec.rb
 create mode 100644 spec/ruby/library/socket/socket/initialize_spec.rb
 create mode 100644 spec/ruby/library/socket/socket/ip_address_list_spec.rb
 create mode 100644 spec/ruby/library/socket/socket/ipv6only_bang_spec.rb
 create mode 100644 spec/ruby/library/socket/socket/local_address_spec.rb
 create mode 100644 spec/ruby/library/socket/socket/remote_address_spec.rb
 create mode 100644 spec/ruby/library/socket/socket/tcp_server_loop_spec.rb
 create mode 100644 spec/ruby/library/socket/socket/tcp_server_sockets_spec.rb
 create mode 100644 spec/ruby/library/socket/socket/tcp_spec.rb
 create mode 100644 spec/ruby/library/socket/socket/udp_server_loop_on_spec.rb
 create mode 100644 spec/ruby/library/socket/socket/udp_server_loop_spec.rb
 create mode 100644 spec/ruby/library/socket/socket/udp_server_recv_spec.rb
 create mode 100644 spec/ruby/library/socket/socket/udp_server_sockets_spec.rb
 create mode 100644 spec/ruby/library/socket/socket/unix_server_loop_spec.rb
 create mode 100644 spec/ruby/library/socket/socket/unix_server_socket_spec.rb
 create mode 100644 spec/ruby/library/socket/socket/unix_spec.rb
 create mode 100644 spec/ruby/library/socket/spec_helper.rb
 create mode 100644 spec/ruby/library/socket/tcpserver/initialize_spec.rb
 create mode 100644 spec/ruby/library/socket/tcpsocket/initialize_spec.rb
 create mode 100644 spec/ruby/library/socket/tcpsocket/local_address_spec.rb
 create mode 100644 spec/ruby/library/socket/tcpsocket/recv_spec.rb
 create mode 100644 spec/ruby/library/socket/tcpsocket/remote_address_spec.rb
 create mode 100644 spec/ruby/library/socket/udpsocket/connect_spec.rb
 create mode 100644 spec/ruby/library/socket/udpsocket/initialize_spec.rb
 create mode 100644 spec/ruby/library/socket/udpsocket/inspect_spec.rb
 create mode 100644 spec/ruby/library/socket/udpsocket/local_address_spec.rb
 create mode 100644 spec/ruby/library/socket/udpsocket/recvfrom_nonblock_spec.rb
 create mode 100644 spec/ruby/library/socket/udpsocket/remote_address_spec.rb
 create mode 100644 spec/ruby/library/socket/unixserver/initialize_spec.rb
 create mode 100644 spec/ruby/library/socket/unixserver/listen_spec.rb
 create mode 100644 spec/ruby/library/socket/unixserver/sysaccept_spec.rb
 create mode 100644 spec/ruby/library/socket/unixsocket/initialize_spec.rb
 create mode 100644 spec/ruby/library/socket/unixsocket/local_address_spec.rb
 create mode 100644 spec/ruby/library/socket/unixsocket/remote_address_spec.rb
 create mode 100644 spec/ruby/library/socket/unixsocket/socketpair_spec.rb
 create mode 100644 spec/ruby/library/weakref/allocate_spec.rb
 create mode 100644 spec/ruby/library/weakref/new_spec.rb
 create mode 100644 spec/ruby/library/zlib/deflate_spec.rb
 create mode 100644 spec/ruby/library/zlib/inflate_spec.rb
 create mode 100644 spec/ruby/security/cve_2010_1330_spec.rb

(limited to 'spec')

diff --git a/spec/ruby/README.md b/spec/ruby/README.md
index d4a55ea9c1..f2e18d5800 100644
--- a/spec/ruby/README.md
+++ b/spec/ruby/README.md
@@ -92,6 +92,13 @@ In similar fashion, the following commands run the respective specs:
 
 See [CONTRIBUTING.md](https://github.com/ruby/spec/blob/master/CONTRIBUTING.md).
 
+### Socket specs from rubysl-socket
+
+Most specs under `library/socket` were imported from [the rubysl-socket project](https://github.com/rubysl/rubysl-socket).
+The 3 copyright holders of rubysl-socket, Yorick Peterse, Chuck Remes and
+Brian Shirai, [agreed to relicense those specs](https://github.com/rubysl/rubysl-socket/issues/15)
+under the MIT license in ruby/spec.
+
 ### History and RubySpec
 
 This project was originally born from [Rubinius](https://github.com/rubinius/rubinius) tests being converted to the spec style.
diff --git a/spec/ruby/command_line/rubyopt_spec.rb b/spec/ruby/command_line/rubyopt_spec.rb
index fb06f60e51..2db42f77ef 100644
--- a/spec/ruby/command_line/rubyopt_spec.rb
+++ b/spec/ruby/command_line/rubyopt_spec.rb
@@ -22,7 +22,7 @@ describe "Processing RUBYOPT" do
     result.should =~ /value of \$DEBUG is true/
   end
 
-  unless CROSS_COMPILING
+  guard -> { not CROSS_COMPILING } do
     it "prints the version number for '-v'" do
       ENV["RUBYOPT"] = '-v'
       ruby_exe("")[/\A.*/].should == RUBY_DESCRIPTION
diff --git a/spec/ruby/core/array/reject_spec.rb b/spec/ruby/core/array/reject_spec.rb
index 77835ef5cd..e6e5e851b6 100644
--- a/spec/ruby/core/array/reject_spec.rb
+++ b/spec/ruby/core/array/reject_spec.rb
@@ -111,6 +111,31 @@ describe "Array#reject!" do
     lambda { ArraySpecs.empty_frozen_array.reject! {} }.should raise_error(frozen_error_class)
   end
 
+  it "does not truncate the array is the block raises an exception" do
+    a = [1, 2, 3]
+    begin
+      a.reject! { raise StandardError, 'Oops' }
+    rescue
+    end
+
+    a.should == [1, 2, 3]
+  end
+
+  ruby_version_is "2.4" do
+    it "only removes elements for which the block returns true, keeping the element which raised an error." do
+      a = [1, 2, 3, 4]
+      begin
+        a.reject! do |x|
+          return true if x == 2
+          raise raise StandardError, 'Oops' if x == 3
+        end
+      rescue
+      end
+
+      a.should == [1, 3, 4]
+    end
+  end
+
   it_behaves_like :enumeratorize, :reject!
   it_behaves_like :enumeratorized_with_origin_size, :reject!, [1,2,3]
   it_behaves_like :delete_if, :reject!
diff --git a/spec/ruby/core/binding/eval_spec.rb b/spec/ruby/core/binding/eval_spec.rb
index 9a397757e9..c0264192b8 100644
--- a/spec/ruby/core/binding/eval_spec.rb
+++ b/spec/ruby/core/binding/eval_spec.rb
@@ -23,6 +23,54 @@ describe "Binding#eval" do
     bind2.local_variables.should == []
   end
 
+  it "inherits __LINE__ from the enclosing scope" do
+    obj = BindingSpecs::Demo.new(1)
+    bind = obj.get_binding
+    bind.eval("__LINE__").should == obj.get_line_of_binding
+  end
+
+  it "preserves __LINE__ across multiple calls to eval" do
+    obj = BindingSpecs::Demo.new(1)
+    bind = obj.get_binding
+    bind.eval("__LINE__").should == obj.get_line_of_binding
+    bind.eval("__LINE__").should == obj.get_line_of_binding
+  end
+
+  it "increments __LINE__ on each line of a multiline eval" do
+    obj = BindingSpecs::Demo.new(1)
+    bind = obj.get_binding
+    bind.eval("#foo\n__LINE__").should == obj.get_line_of_binding + 1
+  end
+
+  it "inherits __LINE__ from the enclosing scope even if the Binding is created with #send" do
+    obj = BindingSpecs::Demo.new(1)
+    bind, line = obj.get_binding_with_send_and_line
+    bind.eval("__LINE__").should == line
+  end
+
+  it "starts with a __LINE__ of 1 if a filename is passed" do
+    bind = BindingSpecs::Demo.new(1).get_binding
+    bind.eval("__LINE__", "(test)").should == 1
+    bind.eval("#foo\n__LINE__", "(test)").should == 2
+  end
+
+  it "starts with a __LINE__ from the third argument if passed" do
+    bind = BindingSpecs::Demo.new(1).get_binding
+    bind.eval("__LINE__", "(test)", 88).should == 88
+    bind.eval("#foo\n__LINE__", "(test)", 88).should == 89
+  end
+
+  it "inherits __FILE__ from the enclosing scope" do
+    obj = BindingSpecs::Demo.new(1)
+    bind = obj.get_binding
+    bind.eval("__FILE__").should == obj.get_file_of_binding
+  end
+
+  it "uses the __FILE__ that is passed in" do
+    bind = BindingSpecs::Demo.new(1).get_binding
+    bind.eval("__FILE__", "(test)").should == "(test)"
+  end
+
   describe "with a file given" do
     it "does not store the filename permanently" do
       obj = BindingSpecs::Demo.new(1)
@@ -33,5 +81,15 @@ describe "Binding#eval" do
     end
   end
 
-  it "needs to be reviewed for spec completeness"
+  it "with __method__ returns the method where the Binding was created" do
+    obj = BindingSpecs::Demo.new(1)
+    bind, meth = obj.get_binding_and_method
+    bind.eval("__method__").should == meth
+  end
+
+  it "with __method__ returns the method where the Binding was created, ignoring #send" do
+    obj = BindingSpecs::Demo.new(1)
+    bind, meth = obj.get_binding_with_send_and_method
+    bind.eval("__method__").should == meth
+  end
 end
diff --git a/spec/ruby/core/binding/fixtures/classes.rb b/spec/ruby/core/binding/fixtures/classes.rb
index 05ca2479ba..43e32cacf6 100644
--- a/spec/ruby/core/binding/fixtures/classes.rb
+++ b/spec/ruby/core/binding/fixtures/classes.rb
@@ -25,6 +25,18 @@ module BindingSpecs
       __FILE__
     end
 
+    def get_binding_with_send_and_line
+      [send(:binding), __LINE__]
+    end
+
+    def get_binding_and_method
+      [binding, :get_binding_and_method]
+    end
+
+    def get_binding_with_send_and_method
+      [send(:binding), :get_binding_with_send_and_method]
+    end
+
     def get_empty_binding
       binding
     end
diff --git a/spec/ruby/core/binding/location_spec.rb b/spec/ruby/core/binding/location_spec.rb
deleted file mode 100644
index 2ae0c5e9f1..0000000000
--- a/spec/ruby/core/binding/location_spec.rb
+++ /dev/null
@@ -1,46 +0,0 @@
-require_relative '../../spec_helper'
-require_relative 'fixtures/classes'
-
-describe "Binding#eval" do
-  it "inherits __LINE__ from the enclosing scope" do
-    obj = BindingSpecs::Demo.new(1)
-    bind = obj.get_binding
-    bind.eval("__LINE__").should == obj.get_line_of_binding
-  end
-
-  it "preserves __LINE__ across multiple calls to eval" do
-    obj = BindingSpecs::Demo.new(1)
-    bind = obj.get_binding
-    bind.eval("__LINE__").should == obj.get_line_of_binding
-    bind.eval("__LINE__").should == obj.get_line_of_binding
-  end
-
-  it "increments __LINE__ on each line of a multiline eval" do
-    obj = BindingSpecs::Demo.new(1)
-    bind = obj.get_binding
-    bind.eval("#foo\n__LINE__").should == obj.get_line_of_binding + 1
-  end
-
-  it "starts with a __LINE__ of 1 if a filename is passed" do
-    bind = BindingSpecs::Demo.new(1).get_binding
-    bind.eval("__LINE__", "(test)").should == 1
-    bind.eval("#foo\n__LINE__", "(test)").should == 2
-  end
-
-  it "starts with a __LINE__ from the third argument if passed" do
-    bind = BindingSpecs::Demo.new(1).get_binding
-    bind.eval("__LINE__", "(test)", 88).should == 88
-    bind.eval("#foo\n__LINE__", "(test)", 88).should == 89
-  end
-
-  it "inherits __FILE__ from the enclosing scope" do
-    obj = BindingSpecs::Demo.new(1)
-    bind = obj.get_binding
-    bind.eval("__FILE__").should == obj.get_file_of_binding
-  end
-
-  it "uses the __FILE__ that is passed in" do
-    bind = BindingSpecs::Demo.new(1).get_binding
-    bind.eval("__FILE__", "(test)").should == "(test)"
-  end
-end
diff --git a/spec/ruby/core/enumerable/sort_by_spec.rb b/spec/ruby/core/enumerable/sort_by_spec.rb
index 46e1135412..8fdd923fb4 100644
--- a/spec/ruby/core/enumerable/sort_by_spec.rb
+++ b/spec/ruby/core/enumerable/sort_by_spec.rb
@@ -32,5 +32,12 @@ describe "Enumerable#sort_by" do
     b.sort_by{ |x| -x }.should == [3, 2, 1]
   end
 
+  it "calls #each to iterate over the elements to be sorted" do
+    b = EnumerableSpecs::Numerous.new( 1, 2, 3 )
+    b.should_receive(:each).once.and_yield(1).and_yield(2).and_yield(3)
+    b.should_not_receive :map
+    b.sort_by { |x| -x }.should == [3, 2, 1]
+  end
+
   it_behaves_like :enumerable_enumeratorized_with_origin_size, :sort_by
 end
diff --git a/spec/ruby/core/io/read_spec.rb b/spec/ruby/core/io/read_spec.rb
index dffa79f10e..3bb581f430 100644
--- a/spec/ruby/core/io/read_spec.rb
+++ b/spec/ruby/core/io/read_spec.rb
@@ -27,6 +27,10 @@ describe "IO.read" do
     IO.read(@fname, {}).should == @contents
   end
 
+  it "accepts a length, and empty options Hash" do
+    IO.read(@fname, 3, {}).should == @contents[0, 3]
+  end
+
   it "accepts a length, offset, and empty options Hash" do
     IO.read(@fname, 3, 0, {}).should == @contents[0, 3]
   end
diff --git a/spec/ruby/core/io/shared/write.rb b/spec/ruby/core/io/shared/write.rb
index bca96da81c..140eeb04ab 100644
--- a/spec/ruby/core/io/shared/write.rb
+++ b/spec/ruby/core/io/shared/write.rb
@@ -85,9 +85,9 @@ describe :io_write, shared: true do
       @r.read.should == "foo"
     end
 
-    it "raises Errno::EPIPE if the read end is closed" do
+    it "raises Errno::EPIPE if the read end is closed and does not die from SIGPIPE" do
       @r.close
-      -> { @w.send(@method, "foo") }.should raise_error(Errno::EPIPE, "Broken pipe")
+      -> { @w.send(@method, "foo") }.should raise_error(Errno::EPIPE, /Broken pipe/)
     end
   end
 end
diff --git a/spec/ruby/core/kernel/__dir___spec.rb b/spec/ruby/core/kernel/__dir___spec.rb
index 25df92a15d..3c34277277 100644
--- a/spec/ruby/core/kernel/__dir___spec.rb
+++ b/spec/ruby/core/kernel/__dir___spec.rb
@@ -5,6 +5,13 @@ describe "Kernel#__dir__" do
     __dir__.should == File.realpath(File.dirname(__FILE__))
   end
 
+  context "when used in eval with a given filename" do
+    it "returns File.dirname(filename)" do
+      eval("__dir__", nil, "foo.rb").should == "."
+      eval("__dir__", nil, "foo/bar.rb").should == "foo"
+    end
+  end
+
   context "when used in eval with top level binding" do
     it "returns the real name of the directory containing the currently-executing file" do
       eval("__dir__", binding).should == File.realpath(File.dirname(__FILE__))
diff --git a/spec/ruby/core/kernel/autoload_spec.rb b/spec/ruby/core/kernel/autoload_spec.rb
index c2573ffac6..5fa8fa92b3 100644
--- a/spec/ruby/core/kernel/autoload_spec.rb
+++ b/spec/ruby/core/kernel/autoload_spec.rb
@@ -7,7 +7,7 @@ require_relative 'fixtures/classes'
 
 autoload :KSAutoloadA, "autoload_a.rb"
 autoload :KSAutoloadB, fixture(__FILE__, "autoload_b.rb")
-autoload :KSAutoloadC, fixture(__FILE__, "autoload_c.rb")
+autoload :KSAutoloadCallsRequire, "main_autoload_not_exist.rb"
 
 def check_autoload(const)
   autoload? const
@@ -42,10 +42,11 @@ describe "Kernel#autoload" do
     KSAutoloadB.loaded.should == :ksautoload_b
   end
 
-  it "does not call Kernel.require or Kernel.load to load the file" do
-    Kernel.should_not_receive(:require)
-    Kernel.should_not_receive(:load)
-    KSAutoloadC.loaded.should == :ksautoload_c
+  it "calls main.require(path) to load the file" do
+    main = TOPLEVEL_BINDING.eval("self")
+    main.should_receive(:require).with("main_autoload_not_exist.rb")
+    # The constant won't be defined since require is mocked to do nothing
+    -> { KSAutoloadCallsRequire }.should raise_error(NameError)
   end
 
   it "can autoload in instance_eval" do
diff --git a/spec/ruby/core/kernel/fixtures/autoload_c.rb b/spec/ruby/core/kernel/fixtures/autoload_c.rb
deleted file mode 100644
index 4569b23669..0000000000
--- a/spec/ruby/core/kernel/fixtures/autoload_c.rb
+++ /dev/null
@@ -1,5 +0,0 @@
-module KSAutoloadC
-  def self.loaded
-    :ksautoload_c
-  end
-end
diff --git a/spec/ruby/core/kernel/require_relative_spec.rb b/spec/ruby/core/kernel/require_relative_spec.rb
index 4a2ef87357..a16e7164e6 100644
--- a/spec/ruby/core/kernel/require_relative_spec.rb
+++ b/spec/ruby/core/kernel/require_relative_spec.rb
@@ -199,6 +199,46 @@ describe "Kernel#require_relative with a relative path" do
       $LOADED_FEATURES.should include(@abs_path)
     end
 
+    platform_is_not :windows do
+      describe "with symlinks" do
+        before :each do
+          @symlink_to_code_dir = tmp("codesymlink")
+          File.symlink(CODE_LOADING_DIR, @symlink_to_code_dir)
+          @symlink_basename = File.basename(@symlink_to_code_dir)
+          @requiring_file = tmp("requiring")
+        end
+
+        after :each do
+          rm_r @symlink_to_code_dir, @requiring_file
+        end
+
+        it "does not canonicalize the path and stores a path with symlinks" do
+          symlink_path = "#{@symlink_basename}/load_fixture.rb"
+          absolute_path = "#{tmp("")}#{symlink_path}"
+          canonical_path = "#{CODE_LOADING_DIR}/load_fixture.rb"
+          touch(@requiring_file) { |f|
+            f.puts "require_relative #{symlink_path.inspect}"
+          }
+          load(@requiring_file)
+          ScratchPad.recorded.should == [:loaded]
+
+          features = $LOADED_FEATURES.select { |path| path.end_with?('load_fixture.rb') }
+          features.should include(absolute_path)
+          features.should_not include(canonical_path)
+        end
+
+        it "stores the same path that __FILE__ returns in the required file" do
+          symlink_path = "#{@symlink_basename}/load_fixture_and__FILE__.rb"
+          touch(@requiring_file) { |f|
+            f.puts "require_relative #{symlink_path.inspect}"
+          }
+          load(@requiring_file)
+          loaded_feature = $LOADED_FEATURES.last
+          ScratchPad.recorded.should == [loaded_feature]
+        end
+      end
+    end
+
     it "does not store the path if the load fails" do
       saved_loaded_features = $LOADED_FEATURES.dup
       lambda { require_relative("#{@dir}/raise_fixture.rb") }.should raise_error(RuntimeError)
diff --git a/spec/ruby/core/kernel/require_spec.rb b/spec/ruby/core/kernel/require_spec.rb
index 362acf8003..dc3da4b7e6 100644
--- a/spec/ruby/core/kernel/require_spec.rb
+++ b/spec/ruby/core/kernel/require_spec.rb
@@ -17,7 +17,6 @@ describe "Kernel#require" do
   end
 
   it_behaves_like :kernel_require_basic, :require, CodeLoadingSpecs::Method.new
-
   it_behaves_like :kernel_require, :require, CodeLoadingSpecs::Method.new
 end
 
@@ -31,6 +30,5 @@ describe "Kernel.require" do
   end
 
   it_behaves_like :kernel_require_basic, :require, Kernel
-
   it_behaves_like :kernel_require, :require, Kernel
 end
diff --git a/spec/ruby/core/kernel/shared/require.rb b/spec/ruby/core/kernel/shared/require.rb
index 5e3f98f813..a81a68088a 100644
--- a/spec/ruby/core/kernel/shared/require.rb
+++ b/spec/ruby/core/kernel/shared/require.rb
@@ -305,6 +305,80 @@ describe :kernel_require, shared: true do
       $LOADED_FEATURES.should include(@path)
     end
 
+    platform_is_not :windows do
+      describe "with symlinks" do
+        before :each do
+          @symlink_to_code_dir = tmp("codesymlink")
+          File.symlink(CODE_LOADING_DIR, @symlink_to_code_dir)
+
+          $LOAD_PATH.delete(CODE_LOADING_DIR)
+          $LOAD_PATH.unshift(@symlink_to_code_dir)
+        end
+
+        after :each do
+          rm_r @symlink_to_code_dir
+        end
+
+        it "does not canonicalize the path and stores a path with symlinks" do
+          symlink_path = "#{@symlink_to_code_dir}/load_fixture.rb"
+          canonical_path = "#{CODE_LOADING_DIR}/load_fixture.rb"
+          @object.require(symlink_path).should be_true
+          ScratchPad.recorded.should == [:loaded]
+
+          features = $LOADED_FEATURES.select { |path| path.end_with?('load_fixture.rb') }
+          features.should include(symlink_path)
+          features.should_not include(canonical_path)
+        end
+
+        it "stores the same path that __FILE__ returns in the required file" do
+          symlink_path = "#{@symlink_to_code_dir}/load_fixture_and__FILE__.rb"
+          @object.require(symlink_path).should be_true
+          loaded_feature = $LOADED_FEATURES.last
+          ScratchPad.recorded.should == [loaded_feature]
+        end
+      end
+
+      describe "with symlinks in the required feature and $LOAD_PATH" do
+        before :each do
+          @dir = tmp("realdir")
+          mkdir_p @dir
+          @file = "#{@dir}/realfile.rb"
+          touch(@file) { |f| f.puts 'ScratchPad << __FILE__' }
+
+          @symlink_to_dir = tmp("symdir").freeze
+          File.symlink(@dir, @symlink_to_dir)
+          @symlink_to_file = "#{@dir}/symfile.rb"
+          File.symlink("realfile.rb", @symlink_to_file)
+        end
+
+        after :each do
+          rm_r @dir, @symlink_to_dir
+        end
+
+        ruby_version_is ""..."2.4.4" do
+          it "canonicalizes neither the entry in $LOAD_PATH nor the filename passed to #require" do
+            $LOAD_PATH.unshift(@symlink_to_dir)
+            @object.require("symfile").should be_true
+            loaded_feature = "#{@symlink_to_dir}/symfile.rb"
+            ScratchPad.recorded.should == [loaded_feature]
+            $".last.should == loaded_feature
+            $LOAD_PATH[0].should == @symlink_to_dir
+          end
+        end
+
+        ruby_version_is "2.4.4" do
+          it "canonicalizes the entry in $LOAD_PATH but not the filename passed to #require" do
+            $LOAD_PATH.unshift(@symlink_to_dir)
+            @object.require("symfile").should be_true
+            loaded_feature = "#{@dir}/symfile.rb"
+            ScratchPad.recorded.should == [loaded_feature]
+            $".last.should == loaded_feature
+            $LOAD_PATH[0].should == @symlink_to_dir
+          end
+        end
+      end
+    end
+
     it "does not store the path if the load fails" do
       $LOAD_PATH << CODE_LOADING_DIR
       saved_loaded_features = $LOADED_FEATURES.dup
@@ -417,7 +491,7 @@ describe :kernel_require, shared: true do
       $LOADED_FEATURES.should include(@path)
     end
 
-    it "canonicalizes non-unique absolute paths" do
+    it "expands absolute paths containing .." do
       path = File.join CODE_LOADING_DIR, "..", "code", "load_fixture.rb"
       @object.require(path).should be_true
       $LOADED_FEATURES.should include(@path)
diff --git a/spec/ruby/core/module/autoload_spec.rb b/spec/ruby/core/module/autoload_spec.rb
index f355a5968d..89c061ff47 100644
--- a/spec/ruby/core/module/autoload_spec.rb
+++ b/spec/ruby/core/module/autoload_spec.rb
@@ -105,6 +105,14 @@ describe "Module#autoload" do
     ModuleSpecs::Autoload::J.should == :autoload_j
   end
 
+  it "calls main.require(path) to load the file" do
+    ModuleSpecs::Autoload.autoload :ModuleAutoloadCallsRequire, "module_autoload_not_exist.rb"
+    main = TOPLEVEL_BINDING.eval("self")
+    main.should_receive(:require).with("module_autoload_not_exist.rb")
+    # The constant won't be defined since require is mocked to do nothing
+    -> { ModuleSpecs::Autoload::ModuleAutoloadCallsRequire }.should raise_error(NameError)
+  end
+
   it "does not load the file if the file is manually required" do
     filename = fixture(__FILE__, "autoload_k.rb")
     ModuleSpecs::Autoload.autoload :KHash, filename
@@ -158,28 +166,169 @@ describe "Module#autoload" do
     ModuleSpecs::Autoload.use_ex1.should == :good
   end
 
-  it "does not load the file when referring to the constant in defined?" do
-    module ModuleSpecs::Autoload::Q
-      autoload :R, fixture(__FILE__, "autoload.rb")
-      defined?(R).should == "constant"
+  describe "interacting with defined?" do
+    it "does not load the file when referring to the constant in defined?" do
+      module ModuleSpecs::Autoload::Dog
+        autoload :R, fixture(__FILE__, "autoload_exception.rb")
+      end
+
+      defined?(ModuleSpecs::Autoload::Dog::R).should == "constant"
+      ScratchPad.recorded.should be_nil
+
+      ModuleSpecs::Autoload::Dog.should have_constant(:R)
+    end
+
+    it "loads an autoloaded parent when referencing a nested constant" do
+      module ModuleSpecs::Autoload
+        autoload :GoodParent, fixture(__FILE__, "autoload_nested.rb")
+      end
+
+      defined?(ModuleSpecs::Autoload::GoodParent::Nested).should == 'constant'
+      ScratchPad.recorded.should == :loaded
+
+      ModuleSpecs::Autoload.send(:remove_const, :GoodParent)
+    end
+
+    it "returns nil when it fails to load an autoloaded parent when referencing a nested constant" do
+      module ModuleSpecs::Autoload
+        autoload :BadParent, fixture(__FILE__, "autoload_exception.rb")
+      end
+
+      defined?(ModuleSpecs::Autoload::BadParent::Nested).should be_nil
+      ScratchPad.recorded.should == :exception
+    end
+  end
+
+  describe "during the autoload before the constant is assigned" do
+    before :each do
+      @path = fixture(__FILE__, "autoload_during_autoload.rb")
+      ModuleSpecs::Autoload.autoload :DuringAutoload, @path
+      raise unless ModuleSpecs::Autoload.autoload?(:DuringAutoload) == @path
+    end
+
+    after :each do
+      ModuleSpecs::Autoload.send(:remove_const, :DuringAutoload)
+    end
+
+    def check_before_during_thread_after(&check)
+      before = check.call
+      to_autoload_thread, from_autoload_thread = Queue.new, Queue.new
+      ScratchPad.record -> {
+        from_autoload_thread.push check.call
+        to_autoload_thread.pop
+      }
+      t = Thread.new {
+        in_loading_thread = from_autoload_thread.pop
+        in_other_thread = check.call
+        to_autoload_thread.push :done
+        [in_loading_thread, in_other_thread]
+      }
+      in_loading_thread, in_other_thread = nil
+      begin
+        ModuleSpecs::Autoload::DuringAutoload
+      ensure
+        in_loading_thread, in_other_thread = t.value
+      end
+      after = check.call
+      [before, in_loading_thread, in_other_thread, after]
+    end
+
+    it "returns nil in autoload thread and 'constant' otherwise for defined?" do
+      results = check_before_during_thread_after {
+        defined?(ModuleSpecs::Autoload::DuringAutoload)
+      }
+      results.should == ['constant', nil, 'constant', 'constant']
+    end
+
+    it "keeps the constant in Module#constants" do
+      results = check_before_during_thread_after {
+        ModuleSpecs::Autoload.constants(false).include?(:DuringAutoload)
+      }
+      results.should == [true, true, true, true]
+    end
+
+    it "returns false in autoload thread and true otherwise for Module#const_defined?" do
+      results = check_before_during_thread_after {
+        ModuleSpecs::Autoload.const_defined?(:DuringAutoload, false)
+      }
+      results.should == [true, false, true, true]
+    end
+
+    it "returns nil in autoload thread and returns the path in other threads for Module#autoload?" do
+      results = check_before_during_thread_after {
+        ModuleSpecs::Autoload.autoload?(:DuringAutoload)
+      }
+      results.should == [@path, nil, @path, nil]
     end
-    ModuleSpecs::Autoload::Q.should have_constant(:R)
   end
 
-  it "does not remove the constant from the constant table if load fails" do
+  it "does not remove the constant from Module#constants if load fails and keeps it as an autoload" do
     ModuleSpecs::Autoload.autoload :Fail, @non_existent
+
+    ModuleSpecs::Autoload.const_defined?(:Fail).should == true
     ModuleSpecs::Autoload.should have_constant(:Fail)
+    ModuleSpecs::Autoload.autoload?(:Fail).should == @non_existent
 
     lambda { ModuleSpecs::Autoload::Fail }.should raise_error(LoadError)
+
     ModuleSpecs::Autoload.should have_constant(:Fail)
+    ModuleSpecs::Autoload.const_defined?(:Fail).should == true
+    ModuleSpecs::Autoload.autoload?(:Fail).should == @non_existent
+
+    lambda { ModuleSpecs::Autoload::Fail }.should raise_error(LoadError)
   end
 
-  it "does not remove the constant from the constant table if the loaded files does not define it" do
-    ModuleSpecs::Autoload.autoload :O, fixture(__FILE__, "autoload_o.rb")
+  it "does not remove the constant from Module#constants if load raises a RuntimeError and keeps it as an autoload" do
+    path = fixture(__FILE__, "autoload_raise.rb")
+    ScratchPad.record []
+    ModuleSpecs::Autoload.autoload :Raise, path
+
+    ModuleSpecs::Autoload.const_defined?(:Raise).should == true
+    ModuleSpecs::Autoload.should have_constant(:Raise)
+    ModuleSpecs::Autoload.autoload?(:Raise).should == path
+
+    lambda { ModuleSpecs::Autoload::Raise }.should raise_error(RuntimeError)
+    ScratchPad.recorded.should == [:raise]
+
+    ModuleSpecs::Autoload.should have_constant(:Raise)
+    ModuleSpecs::Autoload.const_defined?(:Raise).should == true
+    ModuleSpecs::Autoload.autoload?(:Raise).should == path
+
+    lambda { ModuleSpecs::Autoload::Raise }.should raise_error(RuntimeError)
+    ScratchPad.recorded.should == [:raise, :raise]
+  end
+
+  it "does not remove the constant from Module#constants if the loaded file does not define it, but leaves it as 'undefined'" do
+    path = fixture(__FILE__, "autoload_o.rb")
+    ScratchPad.record []
+    ModuleSpecs::Autoload.autoload :O, path
+
+    ModuleSpecs::Autoload.const_defined?(:O).should == true
     ModuleSpecs::Autoload.should have_constant(:O)
+    ModuleSpecs::Autoload.autoload?(:O).should == path
 
     lambda { ModuleSpecs::Autoload::O }.should raise_error(NameError)
+
     ModuleSpecs::Autoload.should have_constant(:O)
+    ModuleSpecs::Autoload.const_defined?(:O).should == false
+    ModuleSpecs::Autoload.autoload?(:O).should == nil
+    -> { ModuleSpecs::Autoload.const_get(:O) }.should raise_error(NameError)
+  end
+
+  it "does not try to load the file again if the loaded file did not define the constant" do
+    path = fixture(__FILE__, "autoload_o.rb")
+    ScratchPad.record []
+    ModuleSpecs::Autoload.autoload :NotDefinedByFile, path
+
+    -> { ModuleSpecs::Autoload::NotDefinedByFile }.should raise_error(NameError)
+    ScratchPad.recorded.should == [:loaded]
+    -> { ModuleSpecs::Autoload::NotDefinedByFile }.should raise_error(NameError)
+    ScratchPad.recorded.should == [:loaded]
+
+    Thread.new {
+      -> { ModuleSpecs::Autoload::NotDefinedByFile }.should raise_error(NameError)
+    }.join
+    ScratchPad.recorded.should == [:loaded]
   end
 
   it "returns 'constant' on referring the constant with defined?()" do
@@ -216,7 +365,6 @@ describe "Module#autoload" do
   end
 
   it "loads the file that defines subclass XX::YY < YY and YY is a top level constant" do
-
     module ModuleSpecs::Autoload::XX
       autoload :YY, fixture(__FILE__, "autoload_subclass.rb")
     end
@@ -224,30 +372,130 @@ describe "Module#autoload" do
     ModuleSpecs::Autoload::XX::YY.superclass.should == YY
   end
 
+  describe "after autoloading searches for the constant like the original lookup" do
+    it "in lexical scopes if both declared and defined in parent" do
+      module ModuleSpecs::Autoload
+        ScratchPad.record -> {
+          DeclaredAndDefinedInParent = :declared_and_defined_in_parent
+        }
+        autoload :DeclaredAndDefinedInParent, fixture(__FILE__, "autoload_callback.rb")
+        class LexicalScope
+          DeclaredAndDefinedInParent.should == :declared_and_defined_in_parent
 
-  it "looks up the constant in the scope where it is referred" do
-    module ModuleSpecs
-      module Autoload
-        autoload :QQ, fixture(__FILE__, "autoload_scope.rb")
-        class PP
-          QQ.new.should be_kind_of(ModuleSpecs::Autoload::PP::QQ)
+          # The constant is really in Autoload, not Autoload::LexicalScope
+          self.should_not have_constant(:DeclaredAndDefinedInParent)
+          -> { const_get(:DeclaredAndDefinedInParent) }.should raise_error(NameError)
         end
+        DeclaredAndDefinedInParent.should == :declared_and_defined_in_parent
       end
     end
-  end
 
-  it "looks up the constant when in a meta class scope" do
-    module ModuleSpecs
-      module Autoload
-        autoload :R, fixture(__FILE__, "autoload_r.rb")
+    it "in lexical scopes if declared in parent and defined in current" do
+      module ModuleSpecs::Autoload
+        ScratchPad.record -> {
+          class LexicalScope
+            DeclaredInParentDefinedInCurrent = :declared_in_parent_defined_in_current
+          end
+        }
+        autoload :DeclaredInParentDefinedInCurrent, fixture(__FILE__, "autoload_callback.rb")
+
+        class LexicalScope
+          DeclaredInParentDefinedInCurrent.should == :declared_in_parent_defined_in_current
+          LexicalScope::DeclaredInParentDefinedInCurrent.should == :declared_in_parent_defined_in_current
+        end
+
+        # Basically, the parent autoload constant remains in a "undefined" state
+        self.autoload?(:DeclaredInParentDefinedInCurrent).should == nil
+        const_defined?(:DeclaredInParentDefinedInCurrent).should == false
+        self.should have_constant(:DeclaredInParentDefinedInCurrent)
+        -> { DeclaredInParentDefinedInCurrent }.should raise_error(NameError)
+
+        ModuleSpecs::Autoload::LexicalScope.send(:remove_const, :DeclaredInParentDefinedInCurrent)
+      end
+    end
+
+    it "and fails when finding the undefined autoload constant in the the current scope when declared in current and defined in parent" do
+      module ModuleSpecs::Autoload
+        ScratchPad.record -> {
+          DeclaredInCurrentDefinedInParent = :declared_in_current_defined_in_parent
+        }
+
+        class LexicalScope
+          autoload :DeclaredInCurrentDefinedInParent, fixture(__FILE__, "autoload_callback.rb")
+          -> { DeclaredInCurrentDefinedInParent }.should raise_error(NameError)
+          # Basically, the autoload constant remains in a "undefined" state
+          self.autoload?(:DeclaredInCurrentDefinedInParent).should == nil
+          const_defined?(:DeclaredInCurrentDefinedInParent).should == false
+          self.should have_constant(:DeclaredInCurrentDefinedInParent)
+          -> { const_get(:DeclaredInCurrentDefinedInParent) }.should raise_error(NameError)
+        end
+
+        DeclaredInCurrentDefinedInParent.should == :declared_in_current_defined_in_parent
+      end
+    end
+
+    it "in the included modules" do
+      module ModuleSpecs::Autoload
+        ScratchPad.record -> {
+          module DefinedInIncludedModule
+            Incl = :defined_in_included_module
+          end
+          include DefinedInIncludedModule
+        }
+        autoload :Incl, fixture(__FILE__, "autoload_callback.rb")
+        Incl.should == :defined_in_included_module
+      end
+    end
+
+    it "in the included modules of the superclass" do
+      module ModuleSpecs::Autoload
+        class LookupAfterAutoloadSuper
+        end
+        class LookupAfterAutoloadChild < LookupAfterAutoloadSuper
+        end
+
+        ScratchPad.record -> {
+          module DefinedInSuperclassIncludedModule
+            InclS = :defined_in_superclass_included_module
+          end
+          LookupAfterAutoloadSuper.include DefinedInSuperclassIncludedModule
+        }
+
+        class LookupAfterAutoloadChild
+          autoload :InclS, fixture(__FILE__, "autoload_callback.rb")
+          InclS.should == :defined_in_superclass_included_module
+        end
+      end
+    end
+
+    it "in the prepended modules" do
+      module ModuleSpecs::Autoload
+        ScratchPad.record -> {
+          module DefinedInPrependedModule
+            Prep = :defined_in_prepended_module
+          end
+          include DefinedInPrependedModule
+        }
+        autoload :Prep, fixture(__FILE__, "autoload_callback.rb")
+        Prep.should == :defined_in_prepended_module
+      end
+    end
+
+    it "in a meta class scope" do
+      module ModuleSpecs::Autoload
+        ScratchPad.record -> {
+          class MetaScope
+          end
+        }
+        autoload :MetaScope, fixture(__FILE__, "autoload_callback.rb")
         class << self
           def r
-            R.new
+            MetaScope.new
           end
         end
       end
+      ModuleSpecs::Autoload.r.should be_kind_of(ModuleSpecs::Autoload::MetaScope)
     end
-    ModuleSpecs::Autoload.r.should be_kind_of(ModuleSpecs::Autoload::R)
   end
 
   # [ruby-core:19127] [ruby-core:29941]
@@ -266,6 +514,21 @@ describe "Module#autoload" do
     ModuleSpecs::Autoload::W.send(:remove_const, :Y)
   end
 
+  it "does not call #require a second time and does not warn if already loading the same feature with #require" do
+    main = TOPLEVEL_BINDING.eval("self")
+    main.should_not_receive(:require)
+
+    module ModuleSpecs::Autoload
+      autoload :AutoloadDuringRequire, fixture(__FILE__, "autoload_during_require.rb")
+    end
+
+    -> {
+      $VERBOSE = true
+      Kernel.require fixture(__FILE__, "autoload_during_require.rb")
+    }.should_not complain
+    ModuleSpecs::Autoload::AutoloadDuringRequire.should be_kind_of(Class)
+  end
+
   it "calls #to_path on non-string filenames" do
     p = mock('path')
     p.should_receive(:to_path).and_return @non_existent
diff --git a/spec/ruby/core/module/const_get_spec.rb b/spec/ruby/core/module/const_get_spec.rb
index 74fe94aaed..461b303d6d 100644
--- a/spec/ruby/core/module/const_get_spec.rb
+++ b/spec/ruby/core/module/const_get_spec.rb
@@ -1,5 +1,6 @@
 require_relative '../../spec_helper'
 require_relative '../../fixtures/constants'
+require_relative 'fixtures/constants_autoload'
 
 describe "Module#const_get" do
   it "accepts a String or Symbol name" do
@@ -95,6 +96,10 @@ describe "Module#const_get" do
     ConstantSpecs.const_get("ClassA::CS_CONST10").should == :const10_10
   end
 
+  it "raises a NameError if the name includes two successive scope separators" do
+    lambda { ConstantSpecs.const_get("ClassA::::CS_CONST10") }.should raise_error(NameError)
+  end
+
   it "raises a NameError if only '::' is passed" do
     lambda { ConstantSpecs.const_get("::") }.should raise_error(NameError)
   end
@@ -111,6 +116,22 @@ describe "Module#const_get" do
      ConstantSpecs.const_get(:CS_PRIVATE).should == :cs_private
   end
 
+  it 'does autoload a constant' do
+    Object.const_get('CSAutoloadA').name.should == 'CSAutoloadA'
+  end
+
+  it 'does autoload a constant with a toplevel scope qualifier' do
+    Object.const_get('::CSAutoloadB').name.should == 'CSAutoloadB'
+  end
+
+  it 'does autoload a module and resolve a constant within' do
+    Object.const_get('CSAutoloadC::CONST').should == 7
+  end
+
+  it 'does autoload a non-toplevel module' do
+    Object.const_get('CSAutoloadD::InnerModule').name.should == 'CSAutoloadD::InnerModule'
+  end
+
   describe "with statically assigned constants" do
     it "searches the immediate class or module first" do
       ConstantSpecs::ClassA.const_get(:CS_CONST10).should == :const10_10
diff --git a/spec/ruby/core/module/fixtures/autoload_callback.rb b/spec/ruby/core/module/fixtures/autoload_callback.rb
new file mode 100644
index 0000000000..51d53eb580
--- /dev/null
+++ b/spec/ruby/core/module/fixtures/autoload_callback.rb
@@ -0,0 +1,2 @@
+block = ScratchPad.recorded
+block.call
diff --git a/spec/ruby/core/module/fixtures/autoload_during_autoload.rb b/spec/ruby/core/module/fixtures/autoload_during_autoload.rb
new file mode 100644
index 0000000000..5202bd8b23
--- /dev/null
+++ b/spec/ruby/core/module/fixtures/autoload_during_autoload.rb
@@ -0,0 +1,7 @@
+block = ScratchPad.recorded
+ScratchPad.record(block.call)
+
+module ModuleSpecs::Autoload
+  class DuringAutoload
+  end
+end
diff --git a/spec/ruby/core/module/fixtures/autoload_during_require.rb b/spec/ruby/core/module/fixtures/autoload_during_require.rb
new file mode 100644
index 0000000000..6fd81592e3
--- /dev/null
+++ b/spec/ruby/core/module/fixtures/autoload_during_require.rb
@@ -0,0 +1,4 @@
+module ModuleSpecs::Autoload
+  class AutoloadDuringRequire
+  end
+end
diff --git a/spec/ruby/core/module/fixtures/autoload_exception.rb b/spec/ruby/core/module/fixtures/autoload_exception.rb
new file mode 100644
index 0000000000..09acf9f537
--- /dev/null
+++ b/spec/ruby/core/module/fixtures/autoload_exception.rb
@@ -0,0 +1,3 @@
+ScratchPad.record(:exception)
+
+raise 'intentional error to test failure conditions during autoloading'
diff --git a/spec/ruby/core/module/fixtures/autoload_nested.rb b/spec/ruby/core/module/fixtures/autoload_nested.rb
new file mode 100644
index 0000000000..073cec0dce
--- /dev/null
+++ b/spec/ruby/core/module/fixtures/autoload_nested.rb
@@ -0,0 +1,8 @@
+module ModuleSpecs::Autoload
+  module GoodParent
+    class Nested
+    end
+  end
+end
+
+ScratchPad.record(:loaded)
diff --git a/spec/ruby/core/module/fixtures/autoload_o.rb b/spec/ruby/core/module/fixtures/autoload_o.rb
index 6d54ddaf12..7d88f969b2 100644
--- a/spec/ruby/core/module/fixtures/autoload_o.rb
+++ b/spec/ruby/core/module/fixtures/autoload_o.rb
@@ -1 +1,2 @@
 # does not define ModuleSpecs::Autoload::O
+ScratchPad << :loaded
diff --git a/spec/ruby/core/module/fixtures/autoload_raise.rb b/spec/ruby/core/module/fixtures/autoload_raise.rb
new file mode 100644
index 0000000000..f6051e3ba2
--- /dev/null
+++ b/spec/ruby/core/module/fixtures/autoload_raise.rb
@@ -0,0 +1,2 @@
+ScratchPad << :raise
+raise "exception during autoload"
diff --git a/spec/ruby/core/module/fixtures/autoload_scope.rb b/spec/ruby/core/module/fixtures/autoload_scope.rb
deleted file mode 100644
index 04193687b5..0000000000
--- a/spec/ruby/core/module/fixtures/autoload_scope.rb
+++ /dev/null
@@ -1,8 +0,0 @@
-module ModuleSpecs
-  module Autoload
-    class PP
-      class QQ
-      end
-    end
-  end
-end
diff --git a/spec/ruby/core/module/fixtures/constants_autoload.rb b/spec/ruby/core/module/fixtures/constants_autoload.rb
new file mode 100644
index 0000000000..8e9aa8de0c
--- /dev/null
+++ b/spec/ruby/core/module/fixtures/constants_autoload.rb
@@ -0,0 +1,6 @@
+autoload :CSAutoloadA, fixture(__FILE__, 'constants_autoload_a.rb')
+autoload :CSAutoloadB, fixture(__FILE__, 'constants_autoload_b.rb')
+autoload :CSAutoloadC, fixture(__FILE__, 'constants_autoload_c.rb')
+module CSAutoloadD
+  autoload :InnerModule, fixture(__FILE__, 'constants_autoload_d.rb')
+end
diff --git a/spec/ruby/core/module/fixtures/constants_autoload_a.rb b/spec/ruby/core/module/fixtures/constants_autoload_a.rb
new file mode 100644
index 0000000000..48d3b63681
--- /dev/null
+++ b/spec/ruby/core/module/fixtures/constants_autoload_a.rb
@@ -0,0 +1,2 @@
+module CSAutoloadA
+end
diff --git a/spec/ruby/core/module/fixtures/constants_autoload_b.rb b/spec/ruby/core/module/fixtures/constants_autoload_b.rb
new file mode 100644
index 0000000000..29cd742d03
--- /dev/null
+++ b/spec/ruby/core/module/fixtures/constants_autoload_b.rb
@@ -0,0 +1,2 @@
+module CSAutoloadB
+end
diff --git a/spec/ruby/core/module/fixtures/constants_autoload_c.rb b/spec/ruby/core/module/fixtures/constants_autoload_c.rb
new file mode 100644
index 0000000000..9d6a6bf4d7
--- /dev/null
+++ b/spec/ruby/core/module/fixtures/constants_autoload_c.rb
@@ -0,0 +1,3 @@
+module CSAutoloadC
+  CONST = 7
+end
diff --git a/spec/ruby/core/module/fixtures/constants_autoload_d.rb b/spec/ruby/core/module/fixtures/constants_autoload_d.rb
new file mode 100644
index 0000000000..52d550bab0
--- /dev/null
+++ b/spec/ruby/core/module/fixtures/constants_autoload_d.rb
@@ -0,0 +1,4 @@
+module CSAutoloadD
+  module InnerModule
+  end
+end
diff --git a/spec/ruby/core/module/initialize_copy_spec.rb b/spec/ruby/core/module/initialize_copy_spec.rb
index 412f1c511b..7ae48f85a9 100644
--- a/spec/ruby/core/module/initialize_copy_spec.rb
+++ b/spec/ruby/core/module/initialize_copy_spec.rb
@@ -7,4 +7,12 @@ describe "Module#initialize_copy" do
     end
     mod.dup.methods(false).should == [:hello]
   end
+
+  # jruby/jruby#5245, https://bugs.ruby-lang.org/issues/3461
+  it "should produce a duped module with inspectable class methods" do
+    mod = Module.new
+    def mod.hello
+    end
+    mod.dup.method(:hello).inspect.should =~ /Module.*hello/
+  end
 end
diff --git a/spec/ruby/core/signal/fixtures/trap_all.rb b/spec/ruby/core/signal/fixtures/trap_all.rb
new file mode 100644
index 0000000000..b2e85df247
--- /dev/null
+++ b/spec/ruby/core/signal/fixtures/trap_all.rb
@@ -0,0 +1,8 @@
+reserved_signals = ARGV
+
+(Signal.list.keys - reserved_signals).each do |signal|
+  Signal.trap(signal, -> {})
+  Signal.trap(signal, "DEFAULT")
+end
+
+puts "OK"
diff --git a/spec/ruby/core/signal/trap_spec.rb b/spec/ruby/core/signal/trap_spec.rb
index d621b6ae6d..66101ee5a0 100644
--- a/spec/ruby/core/signal/trap_spec.rb
+++ b/spec/ruby/core/signal/trap_spec.rb
@@ -115,6 +115,49 @@ platform_is_not :windows do
   end
 
   describe "Signal.trap" do
+    cannot_be_trapped = %w[KILL STOP] # See man 2 signal
+    reserved_signals = %w[VTALRM]
+
+    if PlatformGuard.implementation?(:ruby)
+      reserved_signals += %w[SEGV ILL FPE BUS]
+    end
+
+    if PlatformGuard.implementation?(:truffleruby)
+      if !TruffleRuby.native?
+        reserved_signals += %w[SEGV ILL FPE USR1 QUIT]
+      end
+    end
+
+    if PlatformGuard.implementation?(:jruby)
+      reserved_signals += %w[SEGV ILL FPE BUS USR1 QUIT]
+    end
+
+    cannot_be_trapped.each do |signal|
+      it "raises ArgumentError or Errno::EINVAL for SIG#{signal}" do
+        -> {
+          trap(signal, -> {})
+        }.should raise_error(StandardError) { |e|
+          [ArgumentError, Errno::EINVAL].should include(e.class)
+          e.message.should =~ /Invalid argument|Signal already used by VM or OS/
+        }
+      end
+    end
+
+    reserved_signals.each do |signal|
+      it "raises ArgumentError for reserved signal SIG#{signal}" do
+        -> {
+          trap(signal, -> {})
+        }.should raise_error(ArgumentError, /can't trap reserved signal|Signal already used by VM or OS/)
+      end
+    end
+
+    it "allows to register a handler for all known signals, except reserved signals" do
+      excluded = cannot_be_trapped + reserved_signals
+      out = ruby_exe(fixture(__FILE__, "trap_all.rb"), args: [*excluded, "2>&1"])
+      out.should == "OK\n"
+      $?.exitstatus.should == 0
+    end
+
     it "returns SYSTEM_DEFAULT if passed DEFAULT and no handler was ever set" do
       Signal.trap("PROF", "DEFAULT").should == "SYSTEM_DEFAULT"
     end
diff --git a/spec/ruby/core/string/force_encoding_spec.rb b/spec/ruby/core/string/force_encoding_spec.rb
index c317c84c1f..06e04b8d95 100644
--- a/spec/ruby/core/string/force_encoding_spec.rb
+++ b/spec/ruby/core/string/force_encoding_spec.rb
@@ -6,6 +6,26 @@ with_feature :encoding do
       "abc".force_encoding('shift_jis').encoding.should == Encoding::Shift_JIS
     end
 
+    describe "with a special encoding name" do
+      before :each do
+        @original_encoding = Encoding.default_internal
+      end
+
+      after :each do
+        Encoding.default_internal = @original_encoding
+      end
+
+      it "accepts valid special encoding names" do
+        Encoding.default_internal = "US-ASCII"
+        "abc".force_encoding("internal").encoding.should == Encoding::US_ASCII
+      end
+
+      it "defaults to ASCII-8BIT if special encoding name is not set" do
+        Encoding.default_internal = nil
+        "abc".force_encoding("internal").encoding.should == Encoding::ASCII_8BIT
+      end
+    end
+
     it "accepts an Encoding instance" do
       "abc".force_encoding(Encoding::SHIFT_JIS).encoding.should == Encoding::Shift_JIS
     end
diff --git a/spec/ruby/core/thread/backtrace/location/absolute_path_spec.rb b/spec/ruby/core/thread/backtrace/location/absolute_path_spec.rb
index aeae6b77c6..5bd97442d9 100644
--- a/spec/ruby/core/thread/backtrace/location/absolute_path_spec.rb
+++ b/spec/ruby/core/thread/backtrace/location/absolute_path_spec.rb
@@ -9,4 +9,42 @@ describe 'Thread::Backtrace::Location#absolute_path' do
   it 'returns the absolute path of the call frame' do
     @frame.absolute_path.should == File.realpath(__FILE__)
   end
+
+  context "when used in eval with a given filename" do
+    it "returns filename" do
+      code = "caller_locations(0)[0].absolute_path"
+      eval(code, nil, "foo.rb").should == "foo.rb"
+      eval(code, nil, "foo/bar.rb").should == "foo/bar.rb"
+    end
+  end
+
+  platform_is_not :windows do
+    before :each do
+      @file = fixture(__FILE__, "absolute_path.rb")
+      @symlink = tmp("symlink.rb")
+      File.symlink(@file, @symlink)
+      ScratchPad.record []
+    end
+
+    after :each do
+      rm_r @symlink
+    end
+
+    it "returns a canonical path without symlinks, even when __FILE__ does not" do
+      realpath = File.realpath(@symlink)
+      realpath.should_not == @symlink
+
+      load @symlink
+      ScratchPad.recorded.should == [@symlink, realpath]
+    end
+
+    it "returns a canonical path without symlinks, even when __FILE__ is removed" do
+      realpath = File.realpath(@symlink)
+      realpath.should_not == @symlink
+
+      ScratchPad << -> { rm_r(@symlink) }
+      load @symlink
+      ScratchPad.recorded.should == [@symlink, realpath]
+    end
+  end
 end
diff --git a/spec/ruby/core/thread/backtrace/location/fixtures/absolute_path.rb b/spec/ruby/core/thread/backtrace/location/fixtures/absolute_path.rb
new file mode 100644
index 0000000000..875e97ffac
--- /dev/null
+++ b/spec/ruby/core/thread/backtrace/location/fixtures/absolute_path.rb
@@ -0,0 +1,4 @@
+action = ScratchPad.recorded.pop
+ScratchPad << __FILE__
+action.call if action
+ScratchPad << caller_locations(0)[0].absolute_path
diff --git a/spec/ruby/core/time/localtime_spec.rb b/spec/ruby/core/time/localtime_spec.rb
index 5592150ca2..7942653c78 100644
--- a/spec/ruby/core/time/localtime_spec.rb
+++ b/spec/ruby/core/time/localtime_spec.rb
@@ -93,7 +93,7 @@ describe "Time#localtime" do
 
     it "does nothing if already in a local time zone" do
       time = with_timezone("America/New_York") do
-        break Time.new(2005, 2, 27, 22, 50, 0)
+        Time.new(2005, 2, 27, 22, 50, 0)
       end
       zone = time.zone
 
diff --git a/spec/ruby/fixtures/code/load_fixture_and__FILE__.rb b/spec/ruby/fixtures/code/load_fixture_and__FILE__.rb
new file mode 100644
index 0000000000..27388c7d8d
--- /dev/null
+++ b/spec/ruby/fixtures/code/load_fixture_and__FILE__.rb
@@ -0,0 +1 @@
+ScratchPad << __FILE__
diff --git a/spec/ruby/language/array_spec.rb b/spec/ruby/language/array_spec.rb
index 2198d7a28b..2583cffbf7 100644
--- a/spec/ruby/language/array_spec.rb
+++ b/spec/ruby/language/array_spec.rb
@@ -36,6 +36,13 @@ describe "Array literals" do
     [1, *nil, 3].should == [1, 3]
     [*nil, *nil, *nil].should == []
   end
+
+  it "evaluates each argument exactly once" do
+    se = ArraySpec::SideEffect.new
+    se.array_result(true)
+    se.array_result(false)
+    se.call_count.should == 4
+  end
 end
 
 describe "Bareword array literal" do
diff --git a/spec/ruby/language/constants_spec.rb b/spec/ruby/language/constants_spec.rb
index 49ff8844af..5b111f4e81 100644
--- a/spec/ruby/language/constants_spec.rb
+++ b/spec/ruby/language/constants_spec.rb
@@ -458,16 +458,17 @@ describe "Module#private_constant marked constants" do
     lambda {mod::Foo}.should raise_error(NameError)
   end
 
-  it "sends #const_missing to the original class or module" do
-    mod = Module.new
-    mod.const_set :Foo, true
-    mod.send :private_constant, :Foo
-    def mod.const_missing(name)
-      @const_missing_arg = name
-      name == :Foo ? name : super
-    end
+  ruby_version_is "2.6" do
+    it "sends #const_missing to the original class or module" do
+      mod = Module.new
+      mod.const_set :Foo, true
+      mod.send :private_constant, :Foo
+      def mod.const_missing(name)
+        name == :Foo ? name : super
+      end
 
-    mod::Foo.should == :Foo
+      mod::Foo.should == :Foo
+    end
   end
 
   describe "in a module" do
diff --git a/spec/ruby/language/fixtures/array.rb b/spec/ruby/language/fixtures/array.rb
index 4d8ce74ed6..c1036575ff 100644
--- a/spec/ruby/language/fixtures/array.rb
+++ b/spec/ruby/language/fixtures/array.rb
@@ -8,4 +8,25 @@ module ArraySpec
       [a, b, c, d]
     end
   end
+
+  class SideEffect
+    def initialize()
+      @call_count = 0
+    end
+
+    attr_reader :call_count
+
+    def array_result(a_number)
+      [result(a_number), result(a_number)]
+    end
+
+    def result(a_number)
+      @call_count += 1
+      if a_number
+        1
+      else
+        :thing
+      end
+    end
+  end
 end
diff --git a/spec/ruby/language/optional_assignments_spec.rb b/spec/ruby/language/optional_assignments_spec.rb
index a83c0da272..91b580e084 100644
--- a/spec/ruby/language/optional_assignments_spec.rb
+++ b/spec/ruby/language/optional_assignments_spec.rb
@@ -185,6 +185,19 @@ describe 'Optional variable assignments' do
     describe 'using a #[]' do
       before do
         @a = {}
+        klass = Class.new do
+          def [](k)
+            @hash ||= {}
+            @hash[k]
+          end
+
+          def []=(k, v)
+            @hash ||= {}
+            @hash[k] = v
+            7
+          end
+        end
+        @b = klass.new
       end
 
       it 'leaves new variable unassigned' do
@@ -226,6 +239,15 @@ describe 'Optional variable assignments' do
 
         @a[:k].should == 20
       end
+
+      it 'returns the assigned value, not the result of the []= method with ||=' do
+        (@b[:k] ||= 12).should == 12
+      end
+
+      it 'returns the assigned value, not the result of the []= method with +=' do
+        @b[:k] = 17
+        (@b[:k] += 12).should == 29
+      end
     end
   end
 
diff --git a/spec/ruby/library/date/iso8601_spec.rb b/spec/ruby/library/date/iso8601_spec.rb
new file mode 100644
index 0000000000..41f055e648
--- /dev/null
+++ b/spec/ruby/library/date/iso8601_spec.rb
@@ -0,0 +1,37 @@
+require_relative '../../spec_helper'
+require 'date'
+
+describe "Date.iso8601" do
+  it "parses YYYY-MM-DD into a Date object" do
+    d = Date.iso8601("2018-01-01")
+    d.should == Date.civil(2018, 1, 1)
+  end
+
+  it "parses YYYYMMDD into a Date object" do
+    d = Date.iso8601("20180715")
+    d.should == Date.civil(2018, 7, 15)
+  end
+
+  it "parses a negative Date" do
+    d = Date.iso8601("-4712-01-01")
+    d.should == Date.civil(-4712, 1, 1)
+  end
+
+  it "parses a Symbol into a Date object" do
+    d = Date.iso8601(:'2015-10-15')
+    d.should == Date.civil(2015, 10, 15)
+  end
+
+  it "parses a StringSubclass into a Date object" do
+    d = Date.iso8601(Class.new(String).new("-4712-01-01"))
+    d.should == Date.civil(-4712, 1, 1)
+  end
+
+  it "raises an ArgumentError when passed a Symbol without a valid Date" do
+    lambda { Date.iso8601(:test) }.should raise_error(ArgumentError)
+  end
+
+  it "raises a TypeError when passed an Object" do
+    lambda { Date.iso8601(Object.new) }.should raise_error(TypeError)
+  end
+end
diff --git a/spec/ruby/library/date/parse_spec.rb b/spec/ruby/library/date/parse_spec.rb
index 0c21e9aeba..09e072ba3e 100644
--- a/spec/ruby/library/date/parse_spec.rb
+++ b/spec/ruby/library/date/parse_spec.rb
@@ -64,6 +64,11 @@ describe "Date#parse" do
     d = Date.parse("19101101")
     d.should == Date.civil(1910, 11, 1)
   end
+
+  it "raises a TypeError trying to parse non-String-like object" do
+    lambda { Date.parse(1) }.should raise_error(TypeError)
+    lambda { Date.parse(:invalid) }.should raise_error(TypeError)
+  end
 end
 
 describe "Date#parse with '.' separator" do
diff --git a/spec/ruby/library/socket/addrinfo/afamily_spec.rb b/spec/ruby/library/socket/addrinfo/afamily_spec.rb
index 5e61c8f99c..7229dab9de 100644
--- a/spec/ruby/library/socket/addrinfo/afamily_spec.rb
+++ b/spec/ruby/library/socket/addrinfo/afamily_spec.rb
@@ -1,5 +1,4 @@
-require_relative '../../../spec_helper'
-require 'socket'
+require_relative '../spec_helper'
 
 describe "Addrinfo#afamily" do
   describe "for an ipv4 socket" do
@@ -24,7 +23,7 @@ describe "Addrinfo#afamily" do
     end
   end
 
-  platform_is_not :windows do
+  with_feature :unix_socket do
     describe "for a unix socket" do
       before :each do
         @addrinfo = Addrinfo.unix("/tmp/sock")
diff --git a/spec/ruby/library/socket/addrinfo/bind_spec.rb b/spec/ruby/library/socket/addrinfo/bind_spec.rb
index 8a20ab54d4..6f78890a4d 100644
--- a/spec/ruby/library/socket/addrinfo/bind_spec.rb
+++ b/spec/ruby/library/socket/addrinfo/bind_spec.rb
@@ -1,6 +1,5 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
-require 'socket'
 
 describe "Addrinfo#bind" do
 
diff --git a/spec/ruby/library/socket/addrinfo/canonname_spec.rb b/spec/ruby/library/socket/addrinfo/canonname_spec.rb
index 6105d905d6..a1cc8b3980 100644
--- a/spec/ruby/library/socket/addrinfo/canonname_spec.rb
+++ b/spec/ruby/library/socket/addrinfo/canonname_spec.rb
@@ -1,6 +1,5 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
-require 'socket'
 
 describe "Addrinfo#canonname" do
 
@@ -16,4 +15,13 @@ describe "Addrinfo#canonname" do
       canonname.should == nil
     end
   end
+
+  describe 'when the canonical name is not available' do
+    it 'returns nil' do
+      addr = Addrinfo.new(Socket.sockaddr_in(0, '127.0.0.1'))
+
+      addr.canonname.should be_nil
+    end
+  end
+
 end
diff --git a/spec/ruby/library/socket/addrinfo/connect_from_spec.rb b/spec/ruby/library/socket/addrinfo/connect_from_spec.rb
new file mode 100644
index 0000000000..55fce2e159
--- /dev/null
+++ b/spec/ruby/library/socket/addrinfo/connect_from_spec.rb
@@ -0,0 +1,75 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+describe 'Addrinfo#connect_from' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before do
+      @server = TCPServer.new(ip_address, 0)
+      @port   = @server.connect_address.ip_port
+      @addr   = Addrinfo.tcp(ip_address, @port)
+    end
+
+    after do
+      @socket.close if @socket
+      @server.close
+    end
+
+    describe 'using separate arguments' do
+      it 'returns a Socket when no block is given' do
+        @socket = @addr.connect_from(ip_address, 0)
+        @socket.should be_an_instance_of(Socket)
+      end
+
+      it 'yields the Socket when a block is given' do
+        @addr.connect_from(ip_address, 0) do |socket|
+          socket.should be_an_instance_of(Socket)
+        end
+      end
+
+      it 'treats the last argument as a set of options if it is a Hash' do
+        @socket = @addr.connect_from(ip_address, 0, timeout: 2)
+        @socket.should be_an_instance_of(Socket)
+      end
+
+      it 'binds the socket to the local address' do
+        @socket = @addr.connect_from(ip_address, 0)
+
+        @socket.local_address.ip_address.should == ip_address
+
+        @socket.local_address.ip_port.should > 0
+        @socket.local_address.ip_port.should_not == @port
+      end
+    end
+
+    describe 'using an Addrinfo as the 1st argument' do
+      before do
+        @from_addr = Addrinfo.tcp(ip_address, 0)
+      end
+
+      it 'returns a Socket when no block is given' do
+        @socket = @addr.connect_from(@from_addr)
+        @socket.should be_an_instance_of(Socket)
+      end
+
+      it 'yields the Socket when a block is given' do
+        @addr.connect_from(@from_addr) do |socket|
+          socket.should be_an_instance_of(Socket)
+        end
+      end
+
+      it 'treats the last argument as a set of options if it is a Hash' do
+        @socket = @addr.connect_from(@from_addr, timeout: 2)
+        @socket.should be_an_instance_of(Socket)
+      end
+
+      it 'binds the socket to the local address' do
+        @socket = @addr.connect_from(@from_addr)
+
+        @socket.local_address.ip_address.should == ip_address
+
+        @socket.local_address.ip_port.should > 0
+        @socket.local_address.ip_port.should_not == @port
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/addrinfo/connect_spec.rb b/spec/ruby/library/socket/addrinfo/connect_spec.rb
new file mode 100644
index 0000000000..1c2dc609ca
--- /dev/null
+++ b/spec/ruby/library/socket/addrinfo/connect_spec.rb
@@ -0,0 +1,35 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+describe 'Addrinfo#connect' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before do
+      @server = TCPServer.new(ip_address, 0)
+      @port   = @server.connect_address.ip_port
+    end
+
+    after do
+      @socket.close if @socket
+      @server.close
+    end
+
+    it 'returns a Socket when no block is given' do
+      addr = Addrinfo.tcp(ip_address, @port)
+      @socket = addr.connect
+      @socket.should be_an_instance_of(Socket)
+    end
+
+    it 'yields a Socket when a block is given' do
+      addr = Addrinfo.tcp(ip_address, @port)
+      addr.connect do |socket|
+        socket.should be_an_instance_of(Socket)
+      end
+    end
+
+    it 'accepts a Hash of options' do
+      addr = Addrinfo.tcp(ip_address, @port)
+      @socket = addr.connect(timeout: 2)
+      @socket.should be_an_instance_of(Socket)
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/addrinfo/connect_to_spec.rb b/spec/ruby/library/socket/addrinfo/connect_to_spec.rb
new file mode 100644
index 0000000000..69666da19b
--- /dev/null
+++ b/spec/ruby/library/socket/addrinfo/connect_to_spec.rb
@@ -0,0 +1,75 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+describe 'Addrinfo#connect_to' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before do
+      @server = TCPServer.new(ip_address, 0)
+      @port   = @server.connect_address.ip_port
+      @addr   = Addrinfo.tcp(ip_address, 0)
+    end
+
+    after do
+      @socket.close if @socket
+      @server.close
+    end
+
+    describe 'using separate arguments' do
+      it 'returns a Socket when no block is given' do
+        @socket = @addr.connect_to(ip_address, @port)
+        @socket.should be_an_instance_of(Socket)
+      end
+
+      it 'yields the Socket when a block is given' do
+        @addr.connect_to(ip_address, @port) do |socket|
+          socket.should be_an_instance_of(Socket)
+        end
+      end
+
+      it 'treats the last argument as a set of options if it is a Hash' do
+        @socket = @addr.connect_to(ip_address, @port, timeout: 2)
+        @socket.should be_an_instance_of(Socket)
+      end
+
+      it 'binds the Addrinfo to the local address' do
+        @socket = @addr.connect_to(ip_address, @port)
+
+        @socket.local_address.ip_address.should == ip_address
+
+        @socket.local_address.ip_port.should > 0
+        @socket.local_address.ip_port.should_not == @port
+      end
+    end
+
+    describe 'using an Addrinfo as the 1st argument' do
+      before do
+        @to_addr = Addrinfo.tcp(ip_address, @port)
+      end
+
+      it 'returns a Socket when no block is given' do
+        @socket = @addr.connect_to(@to_addr)
+        @socket.should be_an_instance_of(Socket)
+      end
+
+      it 'yields the Socket when a block is given' do
+        @addr.connect_to(@to_addr) do |socket|
+          socket.should be_an_instance_of(Socket)
+        end
+      end
+
+      it 'treats the last argument as a set of options if it is a Hash' do
+        @socket = @addr.connect_to(@to_addr, timeout: 2)
+        @socket.should be_an_instance_of(Socket)
+      end
+
+      it 'binds the socket to the local address' do
+        @socket = @addr.connect_to(@to_addr)
+
+        @socket.local_address.ip_address.should == ip_address
+
+        @socket.local_address.ip_port.should > 0
+        @socket.local_address.ip_port.should_not == @port
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/addrinfo/family_addrinfo_spec.rb b/spec/ruby/library/socket/addrinfo/family_addrinfo_spec.rb
new file mode 100644
index 0000000000..d3419daaaf
--- /dev/null
+++ b/spec/ruby/library/socket/addrinfo/family_addrinfo_spec.rb
@@ -0,0 +1,115 @@
+require_relative '../spec_helper'
+
+describe 'Addrinfo#family_addrinfo' do
+  it 'raises ArgumentError if no arguments are given' do
+    addr = Addrinfo.tcp('127.0.0.1', 0)
+
+    lambda { addr.family_addrinfo }.should raise_error(ArgumentError)
+  end
+
+  describe 'using multiple arguments' do
+    describe 'with an IP Addrinfo' do
+      before do
+        @source = Addrinfo.tcp('127.0.0.1', 0)
+      end
+
+      it 'raises ArgumentError if only 1 argument is given' do
+        lambda { @source.family_addrinfo('127.0.0.1') }.should raise_error(ArgumentError)
+      end
+
+      it 'raises ArgumentError if more than 2 arguments are given' do
+        lambda { @source.family_addrinfo('127.0.0.1', 0, 666) }.should raise_error(ArgumentError)
+      end
+
+      it 'returns an Addrinfo when a host and port are given' do
+        addr = @source.family_addrinfo('127.0.0.1', 0)
+
+        addr.should be_an_instance_of(Addrinfo)
+      end
+
+      describe 'the returned Addrinfo' do
+        before do
+          @addr = @source.family_addrinfo('127.0.0.1', 0)
+        end
+
+        it 'uses the same address family as the source Addrinfo' do
+          @addr.afamily.should == @source.afamily
+        end
+
+        it 'uses the same protocol family as the source Addrinfo' do
+          @addr.pfamily.should == @source.pfamily
+        end
+
+        it 'uses the same socket type as the source Addrinfo' do
+          @addr.socktype.should == @source.socktype
+        end
+
+        it 'uses the same protocol as the source Addrinfo' do
+          @addr.protocol.should == @source.protocol
+        end
+      end
+    end
+
+    with_feature :unix_socket do
+      describe 'with a UNIX Addrinfo' do
+        before do
+          @source = Addrinfo.unix('cats')
+        end
+
+        it 'raises ArgumentError if more than 1 argument is given' do
+          lambda { @source.family_addrinfo('foo', 'bar') }.should raise_error(ArgumentError)
+        end
+
+        it 'returns an Addrinfo when a UNIX socket path is given' do
+          addr = @source.family_addrinfo('dogs')
+
+          addr.should be_an_instance_of(Addrinfo)
+        end
+
+        describe 'the returned Addrinfo' do
+          before do
+            @addr = @source.family_addrinfo('dogs')
+          end
+
+          it 'uses AF_UNIX as the address family' do
+            @addr.afamily.should == Socket::AF_UNIX
+          end
+
+          it 'uses PF_UNIX as the protocol family' do
+            @addr.pfamily.should == Socket::PF_UNIX
+          end
+
+          it 'uses the given socket path' do
+            @addr.unix_path.should == 'dogs'
+          end
+        end
+      end
+    end
+  end
+
+  describe 'using an Addrinfo as the 1st argument' do
+    before do
+      @source = Addrinfo.tcp('127.0.0.1', 0)
+    end
+
+    it 'returns the input Addrinfo' do
+      input = Addrinfo.tcp('127.0.0.2', 0)
+      @source.family_addrinfo(input).should == input
+    end
+
+    it 'raises ArgumentError if more than 1 argument is given' do
+      input = Addrinfo.tcp('127.0.0.2', 0)
+      lambda { @source.family_addrinfo(input, 666) }.should raise_error(ArgumentError)
+    end
+
+    it "raises ArgumentError if the protocol families don't match" do
+      input = Addrinfo.tcp('::1', 0)
+      lambda { @source.family_addrinfo(input) }.should raise_error(ArgumentError)
+    end
+
+    it "raises ArgumentError if the socket types don't match" do
+      input = Addrinfo.udp('127.0.0.1', 0)
+      lambda { @source.family_addrinfo(input) }.should raise_error(ArgumentError)
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/addrinfo/foreach_spec.rb b/spec/ruby/library/socket/addrinfo/foreach_spec.rb
new file mode 100644
index 0000000000..75c1d1dea2
--- /dev/null
+++ b/spec/ruby/library/socket/addrinfo/foreach_spec.rb
@@ -0,0 +1,9 @@
+require_relative '../spec_helper'
+
+describe 'Addrinfo.foreach' do
+  it 'yields Addrinfo instances to the supplied block' do
+    Addrinfo.foreach('localhost', 80) do |addr|
+      addr.should be_an_instance_of(Addrinfo)
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/addrinfo/getaddrinfo_spec.rb b/spec/ruby/library/socket/addrinfo/getaddrinfo_spec.rb
new file mode 100644
index 0000000000..f0e4b3c986
--- /dev/null
+++ b/spec/ruby/library/socket/addrinfo/getaddrinfo_spec.rb
@@ -0,0 +1,88 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+describe 'Addrinfo.getaddrinfo' do
+  it 'returns an Array of Addrinfo instances' do
+    array = Addrinfo.getaddrinfo('localhost', 80)
+
+    array.should be_an_instance_of(Array)
+    array[0].should be_an_instance_of(Addrinfo)
+  end
+
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    it 'sets the IP address of the Addrinfo instances' do
+      array = Addrinfo.getaddrinfo(ip_address, 80)
+
+      array[0].ip_address.should == ip_address
+    end
+
+    it 'sets the port of the Addrinfo instances' do
+      array = Addrinfo.getaddrinfo(ip_address, 80)
+
+      array[0].ip_port.should == 80
+    end
+
+    it 'sets the address family of the Addrinfo instances' do
+      array = Addrinfo.getaddrinfo(ip_address, 80)
+
+      array[0].afamily.should == family
+    end
+
+    it 'sets the protocol family of the Addrinfo instances' do
+      array = Addrinfo.getaddrinfo(ip_address, 80)
+
+      array[0].pfamily.should == family
+    end
+  end
+
+  guard -> { SocketSpecs.ipv6_available? } do
+    it 'sets a custom protocol family of the Addrinfo instances' do
+      array = Addrinfo.getaddrinfo('localhost', 80, Socket::PF_INET6)
+
+      array[0].pfamily.should == Socket::PF_INET6
+    end
+
+    it 'sets a corresponding address family based on a custom protocol family' do
+      array = Addrinfo.getaddrinfo('localhost', 80, Socket::PF_INET6)
+
+      array[0].afamily.should == Socket::AF_INET6
+    end
+  end
+
+  platform_is_not :windows do
+    it 'sets the default socket type of the Addrinfo instances' do
+      array    = Addrinfo.getaddrinfo('localhost', 80)
+      possible = [Socket::SOCK_STREAM, Socket::SOCK_DGRAM]
+
+      possible.should include(array[0].socktype)
+    end
+  end
+
+  it 'sets a custom socket type of the Addrinfo instances' do
+    array = Addrinfo.getaddrinfo('localhost', 80, nil, Socket::SOCK_DGRAM)
+
+    array[0].socktype.should == Socket::SOCK_DGRAM
+  end
+
+  platform_is_not :windows do
+    it 'sets the default socket protocol of the Addrinfo instances' do
+      array    = Addrinfo.getaddrinfo('localhost', 80)
+      possible = [Socket::IPPROTO_TCP, Socket::IPPROTO_UDP]
+
+      possible.should include(array[0].protocol)
+    end
+  end
+
+  it 'sets a custom socket protocol of the Addrinfo instances' do
+    array = Addrinfo.getaddrinfo('localhost', 80, nil, nil, Socket::IPPROTO_UDP)
+
+    array[0].protocol.should == Socket::IPPROTO_UDP
+  end
+
+  it 'sets the canonical name when AI_CANONNAME is given as a flag' do
+    array = Addrinfo
+      .getaddrinfo('localhost', 80, nil, nil, nil, Socket::AI_CANONNAME)
+
+    array[0].canonname.should be_an_instance_of(String)
+  end
+end
diff --git a/spec/ruby/library/socket/addrinfo/getnameinfo_spec.rb b/spec/ruby/library/socket/addrinfo/getnameinfo_spec.rb
new file mode 100644
index 0000000000..eb600f3e66
--- /dev/null
+++ b/spec/ruby/library/socket/addrinfo/getnameinfo_spec.rb
@@ -0,0 +1,44 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+describe 'Addrinfo#getnameinfo' do
+  describe 'using an IP Addrinfo' do
+    SocketSpecs.each_ip_protocol do |family, ip_address|
+      before do
+        @addr = Addrinfo.tcp(ip_address, 80)
+      end
+
+      it 'returns the node and service names' do
+        host, service = @addr.getnameinfo
+
+        host.should be_an_instance_of(String)
+        service.should == 'http'
+      end
+
+      it 'accepts flags as a Fixnum as the first argument' do
+        host, service = @addr.getnameinfo(Socket::NI_NUMERICSERV)
+
+        host.should be_an_instance_of(String)
+        service.should == '80'
+      end
+    end
+  end
+
+  platform_is :linux do
+    with_feature :unix_socket do
+      describe 'using a UNIX Addrinfo' do
+        before do
+          @addr = Addrinfo.unix('cats')
+          @host = Socket.gethostname
+        end
+
+        it 'returns the hostname and UNIX socket path' do
+          host, path = @addr.getnameinfo
+
+          host.should == @host
+          path.should == 'cats'
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/addrinfo/initialize_spec.rb b/spec/ruby/library/socket/addrinfo/initialize_spec.rb
index 7a6475018a..42a09ebd68 100644
--- a/spec/ruby/library/socket/addrinfo/initialize_spec.rb
+++ b/spec/ruby/library/socket/addrinfo/initialize_spec.rb
@@ -1,5 +1,4 @@
-require_relative '../../../spec_helper'
-require 'socket'
+require_relative '../spec_helper'
 
 describe "Addrinfo#initialize" do
 
@@ -22,6 +21,12 @@ describe "Addrinfo#initialize" do
         @addrinfo.pfamily.should == Socket::PF_UNSPEC
       end
 
+      it 'returns AF_INET as the default address family' do
+        addr = Addrinfo.new(Socket.sockaddr_in(80, '127.0.0.1'))
+
+        addr.afamily.should == Socket::AF_INET
+      end
+
       it "returns the INET6 afamily" do
         @addrinfo.afamily.should == Socket::AF_INET6
       end
@@ -142,7 +147,7 @@ describe "Addrinfo#initialize" do
         @addrinfo.ip_port.should == 46102
       end
 
-      it "returns the Socket::UNSPEC pfamily" do
+      it "returns the Socket::PF_INET pfamily" do
         @addrinfo.pfamily.should == Socket::PF_INET
       end
 
@@ -159,6 +164,46 @@ describe "Addrinfo#initialize" do
       end
     end
 
+    describe 'with a valid IP address' do
+      # Uses AF_INET6 since AF_INET is the default, making it a better test
+      # that Addrinfo actually sets the family correctly.
+      before do
+        @sockaddr = ['AF_INET6', 80, 'hostname', '::1']
+      end
+
+      it 'returns an Addrinfo with the correct IP' do
+        addr = Addrinfo.new(@sockaddr)
+
+        addr.ip_address.should == '::1'
+      end
+
+      it 'returns an Addrinfo with the correct address family' do
+        addr = Addrinfo.new(@sockaddr)
+
+        addr.afamily.should == Socket::AF_INET6
+      end
+
+      it 'returns an Addrinfo with the correct protocol family' do
+        addr = Addrinfo.new(@sockaddr)
+
+        addr.pfamily.should == Socket::PF_INET6
+      end
+
+      it 'returns an Addrinfo with the correct port' do
+        addr = Addrinfo.new(@sockaddr)
+
+        addr.ip_port.should == 80
+      end
+    end
+
+    describe 'with an invalid IP address' do
+      it 'raises SocketError' do
+        block = lambda { Addrinfo.new(['AF_INET6', 80, 'hostname', '127.0.0.1']) }
+
+        block.should raise_error(SocketError)
+      end
+    end
+
     describe "with a family given" do
       before :each do
         @addrinfo = Addrinfo.new(["AF_INET", 46102, "localhost", "127.0.0.1"], Socket::PF_INET)
@@ -217,6 +262,38 @@ describe "Addrinfo#initialize" do
       it "returns the 0 protocol" do
         @addrinfo.protocol.should == 0
       end
+
+      [:SOCK_STREAM, :SOCK_DGRAM, :SOCK_RAW].each do |type|
+        it "overwrites the socket type #{type}" do
+          sockaddr = ['AF_INET', 80, 'hostname', '127.0.0.1']
+
+          value = Socket.const_get(type)
+          addr  = Addrinfo.new(sockaddr, nil, value)
+
+          addr.socktype.should == value
+        end
+      end
+
+      with_feature :sock_packet do
+        [:SOCK_SEQPACKET].each do |type|
+          it "overwrites the socket type #{type}" do
+            sockaddr = ['AF_INET', 80, 'hostname', '127.0.0.1']
+
+            value = Socket.const_get(type)
+            addr  = Addrinfo.new(sockaddr, nil, value)
+
+            addr.socktype.should == value
+          end
+        end
+      end
+
+      it "raises SocketError when using SOCK_RDM" do
+        sockaddr = ['AF_INET', 80, 'hostname', '127.0.0.1']
+        value = Socket::SOCK_RDM
+        block = lambda { Addrinfo.new(sockaddr, nil, value) }
+
+        block.should raise_error(SocketError)
+      end
     end
 
     describe "with a family, socket type and protocol" do
@@ -250,4 +327,261 @@ describe "Addrinfo#initialize" do
     end
   end
 
+  describe 'using an Array with extra arguments' do
+    describe 'with the AF_INET6 address family and an explicit protocol family' do
+      before do
+        @sockaddr = ['AF_INET6', 80, 'hostname', '127.0.0.1']
+      end
+
+      it "raises SocketError when using any Socket constant except except AF_INET(6)/PF_INET(6)" do
+        Socket.constants.grep(/(^AF_|^PF_)(?!INET)/).each do |constant|
+          value = Socket.const_get(constant)
+          -> {
+            Addrinfo.new(@sockaddr, value)
+          }.should raise_error(SocketError)
+        end
+      end
+    end
+
+    describe 'with the AF_INET address family and an explicit socket protocol' do
+      before do
+        @sockaddr = ['AF_INET', 80, 'hostname', '127.0.0.1']
+      end
+
+      describe 'and no socket type is given' do
+        valid = [:IPPROTO_IP, :IPPROTO_UDP, :IPPROTO_HOPOPTS]
+
+        valid.each do |type|
+          it "overwrites the protocol when using #{type}" do
+            value = Socket.const_get(type)
+            addr  = Addrinfo.new(@sockaddr, nil, nil, value)
+
+            addr.protocol.should == value
+          end
+        end
+
+        platform_is_not :windows do
+          (Socket.constants.grep(/^IPPROTO/) - valid).each do |type|
+            it "raises SocketError when using #{type}" do
+              value = Socket.const_get(type)
+              block = lambda { Addrinfo.new(@sockaddr, nil, nil, value) }
+
+              block.should raise_error(SocketError)
+            end
+          end
+        end
+      end
+
+      describe 'and the socket type is set to SOCK_DGRAM' do
+        before do
+          @socktype = Socket::SOCK_DGRAM
+        end
+
+        valid = [:IPPROTO_IP, :IPPROTO_UDP, :IPPROTO_HOPOPTS]
+
+        valid.each do |type|
+          it "overwrites the protocol when using #{type}" do
+            value = Socket.const_get(type)
+            addr  = Addrinfo.new(@sockaddr, nil, @socktype, value)
+
+            addr.protocol.should == value
+          end
+        end
+
+        platform_is_not :windows do
+          (Socket.constants.grep(/^IPPROTO/) - valid).each do |type|
+            it "raises SocketError when using #{type}" do
+              value = Socket.const_get(type)
+              block = lambda { Addrinfo.new(@sockaddr, nil, @socktype, value) }
+
+              block.should raise_error(SocketError)
+            end
+          end
+        end
+      end
+
+      with_feature :sock_packet do
+        describe 'and the socket type is set to SOCK_PACKET' do
+          before do
+            @socktype = Socket::SOCK_PACKET
+          end
+
+          Socket.constants.grep(/^IPPROTO/).each do |type|
+            it "raises SocketError when using #{type}" do
+              value = Socket.const_get(type)
+              block = lambda { Addrinfo.new(@sockaddr, nil, @socktype, value) }
+
+              block.should raise_error(SocketError)
+            end
+          end
+        end
+      end
+
+      describe 'and the socket type is set to SOCK_RAW' do
+        before do
+          @socktype = Socket::SOCK_RAW
+        end
+
+        Socket.constants.grep(/^IPPROTO/).each do |type|
+          it "overwrites the protocol when using #{type}" do
+            value = Socket.const_get(type)
+            addr  = Addrinfo.new(@sockaddr, nil, @socktype, value)
+
+            addr.protocol.should == value
+          end
+        end
+      end
+
+      describe 'and the socket type is set to SOCK_RDM' do
+        before do
+          @socktype = Socket::SOCK_RDM
+        end
+
+        Socket.constants.grep(/^IPPROTO/).each do |type|
+          it "raises SocketError when using #{type}" do
+            value = Socket.const_get(type)
+            block = lambda { Addrinfo.new(@sockaddr, nil, @socktype, value) }
+
+            block.should raise_error(SocketError)
+          end
+        end
+      end
+
+      platform_is_not :windows do
+        describe 'and the socket type is set to SOCK_SEQPACKET' do
+          before do
+            @socktype = Socket::SOCK_SEQPACKET
+          end
+
+          valid = [:IPPROTO_IP, :IPPROTO_HOPOPTS]
+
+          valid.each do |type|
+            it "overwrites the protocol when using #{type}" do
+              value = Socket.const_get(type)
+              addr  = Addrinfo.new(@sockaddr, nil, @socktype, value)
+
+              addr.protocol.should == value
+            end
+          end
+
+          (Socket.constants.grep(/^IPPROTO/) - valid).each do |type|
+            it "raises SocketError when using #{type}" do
+              value = Socket.const_get(type)
+              block = lambda { Addrinfo.new(@sockaddr, nil, @socktype, value) }
+
+              block.should raise_error(SocketError)
+            end
+          end
+        end
+      end
+
+      describe 'and the socket type is set to SOCK_STREAM' do
+        before do
+          @socktype = Socket::SOCK_STREAM
+        end
+
+        valid = [:IPPROTO_IP, :IPPROTO_TCP, :IPPROTO_HOPOPTS]
+
+        valid.each do |type|
+          it "overwrites the protocol when using #{type}" do
+            value = Socket.const_get(type)
+            addr  = Addrinfo.new(@sockaddr, nil, @socktype, value)
+
+            addr.protocol.should == value
+          end
+        end
+
+        platform_is_not :windows do
+          (Socket.constants.grep(/^IPPROTO/) - valid).each do |type|
+            it "raises SocketError when using #{type}" do
+              value = Socket.const_get(type)
+              block = lambda { Addrinfo.new(@sockaddr, nil, @socktype, value) }
+
+              block.should raise_error(SocketError)
+            end
+          end
+        end
+      end
+    end
+  end
+
+  describe 'with Symbols' do
+    before do
+      @sockaddr = Socket.sockaddr_in(80, '127.0.0.1')
+    end
+
+    it 'returns an Addrinfo with :PF_INET  family' do
+      addr = Addrinfo.new(@sockaddr, :PF_INET)
+
+      addr.pfamily.should == Socket::PF_INET
+    end
+
+    it 'returns an Addrinfo with :INET  family' do
+      addr = Addrinfo.new(@sockaddr, :INET)
+
+      addr.pfamily.should == Socket::PF_INET
+    end
+
+    it 'returns an Addrinfo with :SOCK_STREAM as the socket type' do
+      addr = Addrinfo.new(@sockaddr, nil, :SOCK_STREAM)
+
+      addr.socktype.should == Socket::SOCK_STREAM
+    end
+
+    it 'returns an Addrinfo with :STREAM as the socket type' do
+      addr = Addrinfo.new(@sockaddr, nil, :STREAM)
+
+      addr.socktype.should == Socket::SOCK_STREAM
+    end
+  end
+
+  describe 'with Strings' do
+    before do
+      @sockaddr = Socket.sockaddr_in(80, '127.0.0.1')
+    end
+
+    it 'returns an Addrinfo with "PF_INET"  family' do
+      addr = Addrinfo.new(@sockaddr, 'PF_INET')
+
+      addr.pfamily.should == Socket::PF_INET
+    end
+
+    it 'returns an Addrinfo with "INET"  family' do
+      addr = Addrinfo.new(@sockaddr, 'INET')
+
+      addr.pfamily.should == Socket::PF_INET
+    end
+
+    it 'returns an Addrinfo with "SOCK_STREAM" as the socket type' do
+      addr = Addrinfo.new(@sockaddr, nil, 'SOCK_STREAM')
+
+      addr.socktype.should == Socket::SOCK_STREAM
+    end
+
+    it 'returns an Addrinfo with "STREAM" as the socket type' do
+      addr = Addrinfo.new(@sockaddr, nil, 'STREAM')
+
+      addr.socktype.should == Socket::SOCK_STREAM
+    end
+  end
+
+  with_feature :unix_socket do
+    describe 'using separate arguments for a Unix socket' do
+      before do
+        @sockaddr = Socket.pack_sockaddr_un('socket')
+      end
+
+      it 'returns an Addrinfo with the correct unix path' do
+        Addrinfo.new(@sockaddr).unix_path.should == 'socket'
+      end
+
+      it 'returns an Addrinfo with the correct protocol family' do
+        Addrinfo.new(@sockaddr).pfamily.should == Socket::PF_UNSPEC
+      end
+
+      it 'returns an Addrinfo with the correct address family' do
+        Addrinfo.new(@sockaddr).afamily.should == Socket::AF_UNIX
+      end
+    end
+  end
 end
diff --git a/spec/ruby/library/socket/addrinfo/inspect_sockaddr_spec.rb b/spec/ruby/library/socket/addrinfo/inspect_sockaddr_spec.rb
index 2a5990cd47..70ca4dd4d7 100644
--- a/spec/ruby/library/socket/addrinfo/inspect_sockaddr_spec.rb
+++ b/spec/ruby/library/socket/addrinfo/inspect_sockaddr_spec.rb
@@ -1,25 +1,50 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 
-require 'socket'
 
 describe 'Addrinfo#inspect_sockaddr' do
-  it 'IPv4' do
-    Addrinfo.tcp('127.0.0.1', 80).inspect_sockaddr.should == '127.0.0.1:80'
-    Addrinfo.tcp('127.0.0.1', 0).inspect_sockaddr.should == '127.0.0.1'
+  describe 'using an IPv4 address' do
+    it 'returns a String containing the IP address and port number' do
+      addr = Addrinfo.tcp('127.0.0.1', 80)
+
+      addr.inspect_sockaddr.should == '127.0.0.1:80'
+    end
+
+    it 'returns a String containing just the IP address when no port is given' do
+      addr = Addrinfo.tcp('127.0.0.1', 0)
+
+      addr.inspect_sockaddr.should == '127.0.0.1'
+    end
   end
 
-  it 'IPv6' do
-    Addrinfo.tcp('::1', 80).inspect_sockaddr.should == '[::1]:80'
-    Addrinfo.tcp('::1', 0).inspect_sockaddr.should == '::1'
-    ip = '2001:0db8:85a3:0000:0000:8a2e:0370:7334'
-    Addrinfo.tcp(ip, 80).inspect_sockaddr.should == '[2001:db8:85a3::8a2e:370:7334]:80'
-    Addrinfo.tcp(ip, 0).inspect_sockaddr.should == '2001:db8:85a3::8a2e:370:7334'
+  describe 'using an IPv6 address' do
+    before :each do
+      @ip = '2001:0db8:85a3:0000:0000:8a2e:0370:7334'
+    end
+
+    it 'returns a String containing the IP address and port number' do
+      Addrinfo.tcp('::1', 80).inspect_sockaddr.should == '[::1]:80'
+      Addrinfo.tcp(@ip, 80).inspect_sockaddr.should == '[2001:db8:85a3::8a2e:370:7334]:80'
+    end
+
+    it 'returns a String containing just the IP address when no port is given' do
+      Addrinfo.tcp('::1', 0).inspect_sockaddr.should == '::1'
+      Addrinfo.tcp(@ip, 0).inspect_sockaddr.should == '2001:db8:85a3::8a2e:370:7334'
+    end
   end
 
-  platform_is_not :windows do
-    it 'UNIX' do
-      Addrinfo.unix('/tmp/sock').inspect_sockaddr.should == '/tmp/sock'
-      Addrinfo.unix('rel').inspect_sockaddr.should == 'UNIX rel'
+  with_feature :unix_socket do
+    describe 'using a UNIX path' do
+      it 'returns a String containing the UNIX path' do
+        addr = Addrinfo.unix('/foo/bar')
+
+        addr.inspect_sockaddr.should == '/foo/bar'
+      end
+
+      it 'returns a String containing the UNIX path when using a relative path' do
+        addr = Addrinfo.unix('foo')
+
+        addr.inspect_sockaddr.should == 'UNIX foo'
+      end
     end
   end
 end
diff --git a/spec/ruby/library/socket/addrinfo/inspect_spec.rb b/spec/ruby/library/socket/addrinfo/inspect_spec.rb
new file mode 100644
index 0000000000..98e1e83ffa
--- /dev/null
+++ b/spec/ruby/library/socket/addrinfo/inspect_spec.rb
@@ -0,0 +1,65 @@
+require_relative '../spec_helper'
+
+describe 'Addrinfo#inspect' do
+  describe 'using an IPv4 Addrinfo' do
+    it 'returns a String when using a TCP Addrinfo' do
+      addr = Addrinfo.tcp('127.0.0.1', 80)
+
+      addr.inspect.should == '#<Addrinfo: 127.0.0.1:80 TCP>'
+    end
+
+    it 'returns a String when using an UDP Addrinfo' do
+      addr = Addrinfo.udp('127.0.0.1', 80)
+
+      addr.inspect.should == '#<Addrinfo: 127.0.0.1:80 UDP>'
+    end
+
+    it 'returns a String when using an Addrinfo without a port' do
+      addr = Addrinfo.ip('127.0.0.1')
+
+      addr.inspect.should == '#<Addrinfo: 127.0.0.1>'
+    end
+  end
+
+  describe 'using an IPv6 Addrinfo' do
+    it 'returns a String when using a TCP Addrinfo' do
+      addr = Addrinfo.tcp('::1', 80)
+
+      addr.inspect.should == '#<Addrinfo: [::1]:80 TCP>'
+    end
+
+    it 'returns a String when using an UDP Addrinfo' do
+      addr = Addrinfo.udp('::1', 80)
+
+      addr.inspect.should == '#<Addrinfo: [::1]:80 UDP>'
+    end
+
+    it 'returns a String when using an Addrinfo without a port' do
+      addr = Addrinfo.ip('::1')
+
+      addr.inspect.should == '#<Addrinfo: ::1>'
+    end
+  end
+
+  with_feature :unix_socket do
+    describe 'using a UNIX Addrinfo' do
+      it 'returns a String' do
+        addr = Addrinfo.unix('/foo')
+
+        addr.inspect.should == '#<Addrinfo: /foo SOCK_STREAM>'
+      end
+
+      it 'returns a String when using a relative UNIX path' do
+        addr = Addrinfo.unix('foo')
+
+        addr.inspect.should == '#<Addrinfo: UNIX foo SOCK_STREAM>'
+      end
+
+      it 'returns a String when using a DGRAM socket' do
+        addr = Addrinfo.unix('/foo', Socket::SOCK_DGRAM)
+
+        addr.inspect.should == '#<Addrinfo: /foo SOCK_DGRAM>'
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/addrinfo/ip_address_spec.rb b/spec/ruby/library/socket/addrinfo/ip_address_spec.rb
index c36399bf0c..004de37254 100644
--- a/spec/ruby/library/socket/addrinfo/ip_address_spec.rb
+++ b/spec/ruby/library/socket/addrinfo/ip_address_spec.rb
@@ -1,5 +1,4 @@
-require_relative '../../../spec_helper'
-require 'socket'
+require_relative '../spec_helper'
 
 describe "Addrinfo#ip_address" do
   describe "for an ipv4 socket" do
@@ -22,7 +21,7 @@ describe "Addrinfo#ip_address" do
     end
   end
 
-  platform_is_not :windows do
+  with_feature :unix_socket do
     describe "for a unix socket" do
       before :each do
         @addrinfo = Addrinfo.unix("/tmp/sock")
@@ -33,4 +32,54 @@ describe "Addrinfo#ip_address" do
       end
     end
   end
+
+  describe 'with an Array as the socket address' do
+    it 'returns the IP as a String' do
+      sockaddr = ['AF_INET', 80, 'localhost', '127.0.0.1']
+      addr     = Addrinfo.new(sockaddr)
+
+      addr.ip_address.should == '127.0.0.1'
+    end
+  end
+
+  describe 'without an IP address' do
+    before do
+      @ips = ['127.0.0.1', '0.0.0.0', '::1']
+    end
+
+    # Both these cases seem to return different values at times on MRI. Since
+    # this is network dependent we can't rely on an exact IP being returned.
+    it 'returns the local IP address when using an empty String as the IP' do
+      sockaddr = Socket.sockaddr_in(80, '')
+      addr     = Addrinfo.new(sockaddr)
+
+      @ips.include?(addr.ip_address).should == true
+    end
+
+    it 'returns the local IP address when using nil as the IP' do
+      sockaddr = Socket.sockaddr_in(80, nil)
+      addr     = Addrinfo.new(sockaddr)
+
+      @ips.include?(addr.ip_address).should == true
+    end
+  end
+
+  # On MRI calling Addrinfo#ip_address with AF_UNSPEC as the address family is
+  # supposed to raise a SocketError. MRI however doesn't provide a way to
+  # actually initialize an Addrinfo with AF_UNSPEC, nor does it allow stubbing
+  # of any methods since Addrinfo doesn't use any Ruby methods for checking the
+  # IP address. As a result we can only run this test on Rubinius.
+  with_feature :pure_ruby_addrinfo do
+    describe 'with a non IPv4 or IPv6 address' do
+      it 'raises SocketError' do
+        sockaddr = Socket.sockaddr_in(80, '127.0.0.1')
+        addr     = Addrinfo.new(sockaddr)
+
+        addr.stub!(:ipv4?).and_return(false)
+        addr.stub!(:ipv6?).and_return(false)
+
+        lambda { addr.ip_address }.should raise_error(SocketError)
+      end
+    end
+  end
 end
diff --git a/spec/ruby/library/socket/addrinfo/ip_port_spec.rb b/spec/ruby/library/socket/addrinfo/ip_port_spec.rb
index ace6c00ff4..6cf9e7a18e 100644
--- a/spec/ruby/library/socket/addrinfo/ip_port_spec.rb
+++ b/spec/ruby/library/socket/addrinfo/ip_port_spec.rb
@@ -1,5 +1,4 @@
-require_relative '../../../spec_helper'
-require 'socket'
+require_relative '../spec_helper'
 
 describe "Addrinfo#ip_port" do
   describe "for an ipv4 socket" do
@@ -22,7 +21,7 @@ describe "Addrinfo#ip_port" do
     end
   end
 
-  platform_is_not :windows do
+  with_feature :unix_socket do
     describe "for a unix socket" do
       before :each do
         @addrinfo = Addrinfo.unix("/tmp/sock")
diff --git a/spec/ruby/library/socket/addrinfo/ip_spec.rb b/spec/ruby/library/socket/addrinfo/ip_spec.rb
index 6eabbccef8..80e7a62df7 100644
--- a/spec/ruby/library/socket/addrinfo/ip_spec.rb
+++ b/spec/ruby/library/socket/addrinfo/ip_spec.rb
@@ -1,5 +1,5 @@
-require_relative '../../../spec_helper'
-require 'socket'
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
 
 describe "Addrinfo#ip?" do
   describe "for an ipv4 socket" do
@@ -22,15 +22,43 @@ describe "Addrinfo#ip?" do
     end
   end
 
-  platform_is_not :windows do
+  with_feature :unix_socket do
     describe "for a unix socket" do
       before :each do
         @addrinfo = Addrinfo.unix("/tmp/sock")
       end
 
-      it "returns Socket::AF_INET6" do
+      it "returns false" do
         @addrinfo.ip?.should be_false
       end
     end
   end
 end
+
+describe 'Addrinfo.ip' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    it 'returns an Addrinfo instance' do
+      Addrinfo.ip(ip_address).should be_an_instance_of(Addrinfo)
+    end
+
+    it 'sets the IP address' do
+      Addrinfo.ip(ip_address).ip_address.should == ip_address
+    end
+
+    it 'sets the port to 0' do
+      Addrinfo.ip(ip_address).ip_port.should == 0
+    end
+
+    it 'sets the address family' do
+      Addrinfo.ip(ip_address).afamily.should == family
+    end
+
+    it 'sets the protocol family' do
+      Addrinfo.ip(ip_address).pfamily.should == family
+    end
+
+    it 'sets the socket type to 0' do
+      Addrinfo.ip(ip_address).socktype.should == 0
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/addrinfo/ip_unpack_spec.rb b/spec/ruby/library/socket/addrinfo/ip_unpack_spec.rb
index caa34d521d..57ae79a6c8 100644
--- a/spec/ruby/library/socket/addrinfo/ip_unpack_spec.rb
+++ b/spec/ruby/library/socket/addrinfo/ip_unpack_spec.rb
@@ -1,5 +1,4 @@
-require_relative '../../../spec_helper'
-require 'socket'
+require_relative '../spec_helper'
 
 describe "Addrinfo#ip_unpack" do
   describe "for an ipv4 socket" do
@@ -22,7 +21,7 @@ describe "Addrinfo#ip_unpack" do
     end
   end
 
-  platform_is_not :windows do
+  with_feature :unix_socket do
     describe "for a unix socket" do
       before :each do
         @addrinfo = Addrinfo.unix("/tmp/sock")
diff --git a/spec/ruby/library/socket/addrinfo/ipv4_loopback_spec.rb b/spec/ruby/library/socket/addrinfo/ipv4_loopback_spec.rb
index bff15fd407..f5bab711db 100644
--- a/spec/ruby/library/socket/addrinfo/ipv4_loopback_spec.rb
+++ b/spec/ruby/library/socket/addrinfo/ipv4_loopback_spec.rb
@@ -1,19 +1,16 @@
-require_relative '../../../spec_helper'
-require 'socket'
+require_relative '../spec_helper'
 
 describe "Addrinfo#ipv4_loopback?" do
   describe "for an ipv4 socket" do
-    before :each do
-      @loopback = Addrinfo.tcp("127.0.0.1", 80)
-      @other    = Addrinfo.tcp("0.0.0.0", 80)
-    end
-
     it "returns true for the loopback address" do
-      @loopback.ipv4_loopback?.should be_true
+      Addrinfo.ip('127.0.0.1').ipv4_loopback?.should == true
+      Addrinfo.ip('127.0.0.2').ipv4_loopback?.should == true
+      Addrinfo.ip('127.255.0.1').ipv4_loopback?.should == true
+      Addrinfo.ip('127.255.255.255').ipv4_loopback?.should == true
     end
 
     it "returns false for another address" do
-      @other.ipv4_loopback?.should be_false
+      Addrinfo.ip('255.255.255.0').ipv4_loopback?.should be_false
     end
   end
 
@@ -32,7 +29,7 @@ describe "Addrinfo#ipv4_loopback?" do
     end
   end
 
-  platform_is_not :windows do
+  with_feature :unix_socket do
     describe "for a unix socket" do
       before :each do
         @addrinfo = Addrinfo.unix("/tmp/sock")
diff --git a/spec/ruby/library/socket/addrinfo/ipv4_multicast_spec.rb b/spec/ruby/library/socket/addrinfo/ipv4_multicast_spec.rb
index bc6d5afa2d..81a68d3d13 100644
--- a/spec/ruby/library/socket/addrinfo/ipv4_multicast_spec.rb
+++ b/spec/ruby/library/socket/addrinfo/ipv4_multicast_spec.rb
@@ -1,38 +1,21 @@
-require_relative '../../../spec_helper'
-require 'socket'
+require_relative '../spec_helper'
 
 describe "Addrinfo#ipv4_multicast?" do
-  describe "for an ipv4 socket" do
-    before :each do
-      @multicast = Addrinfo.tcp("224.0.0.1", 80)
-      @other     = Addrinfo.tcp("0.0.0.0", 80)
-    end
-
-    it "returns true for the loopback address" do
-      @multicast.ipv4_multicast?.should be_true
-    end
-
-    it "returns false for another address" do
-      @other.ipv4_multicast?.should be_false
-    end
+  it 'returns true for a multicast address' do
+    Addrinfo.ip('224.0.0.0').ipv4_multicast?.should == true
+    Addrinfo.ip('224.0.0.9').ipv4_multicast?.should == true
+    Addrinfo.ip('239.255.255.250').ipv4_multicast?.should == true
   end
 
-  describe "for an ipv6 socket" do
-    before :each do
-      @multicast = Addrinfo.tcp("ff02::1", 80)
-      @other     = Addrinfo.tcp("::", 80)
-    end
-
-    it "returns false for the loopback address" do
-      @multicast.ipv4_multicast?.should be_false
-    end
+  it 'returns false for a regular addrss' do
+    Addrinfo.ip('8.8.8.8').ipv4_multicast?.should == false
+  end
 
-    it "returns false for another address" do
-      @other.ipv4_multicast?.should be_false
-    end
+  it 'returns false for an IPv6 address' do
+    Addrinfo.ip('::1').ipv4_multicast?.should == false
   end
 
-  platform_is_not :windows do
+  with_feature :unix_socket do
     describe "for a unix socket" do
       before :each do
         @addrinfo = Addrinfo.unix("/tmp/sock")
diff --git a/spec/ruby/library/socket/addrinfo/ipv4_private_spec.rb b/spec/ruby/library/socket/addrinfo/ipv4_private_spec.rb
index 6ef5f5574a..733577609e 100644
--- a/spec/ruby/library/socket/addrinfo/ipv4_private_spec.rb
+++ b/spec/ruby/library/socket/addrinfo/ipv4_private_spec.rb
@@ -1,5 +1,4 @@
-require_relative '../../../spec_helper'
-require 'socket'
+require_relative '../spec_helper'
 
 describe "Addrinfo#ipv4_private?" do
   describe "for an ipv4 socket" do
@@ -9,7 +8,14 @@ describe "Addrinfo#ipv4_private?" do
     end
 
     it "returns true for a private address" do
-      @private.ipv4_private?.should be_true
+      Addrinfo.ip('10.0.0.0').ipv4_private?.should == true
+      Addrinfo.ip('10.0.0.5').ipv4_private?.should == true
+
+      Addrinfo.ip('172.16.0.0').ipv4_private?.should == true
+      Addrinfo.ip('172.16.0.5').ipv4_private?.should == true
+
+      Addrinfo.ip('192.168.0.0').ipv4_private?.should == true
+      Addrinfo.ip('192.168.0.5').ipv4_private?.should == true
     end
 
     it "returns false for a public address" do
@@ -27,7 +33,7 @@ describe "Addrinfo#ipv4_private?" do
     end
   end
 
-  platform_is_not :windows do
+  with_feature :unix_socket do
     describe "for a unix socket" do
       before :each do
         @addrinfo = Addrinfo.unix("/tmp/sock")
diff --git a/spec/ruby/library/socket/addrinfo/ipv4_spec.rb b/spec/ruby/library/socket/addrinfo/ipv4_spec.rb
index 7f8926a497..7cba8209b6 100644
--- a/spec/ruby/library/socket/addrinfo/ipv4_spec.rb
+++ b/spec/ruby/library/socket/addrinfo/ipv4_spec.rb
@@ -1,5 +1,4 @@
-require_relative '../../../spec_helper'
-require 'socket'
+require_relative '../spec_helper'
 
 describe "Addrinfo#ipv4?" do
   describe "for an ipv4 socket" do
@@ -22,7 +21,7 @@ describe "Addrinfo#ipv4?" do
     end
   end
 
-  platform_is_not :windows do
+  with_feature :unix_socket do
     describe "for a unix socket" do
       before :each do
         @addrinfo = Addrinfo.unix("/tmp/sock")
diff --git a/spec/ruby/library/socket/addrinfo/ipv6_linklocal_spec.rb b/spec/ruby/library/socket/addrinfo/ipv6_linklocal_spec.rb
new file mode 100644
index 0000000000..fadc612fb7
--- /dev/null
+++ b/spec/ruby/library/socket/addrinfo/ipv6_linklocal_spec.rb
@@ -0,0 +1,18 @@
+require_relative '../spec_helper'
+
+describe 'Addrinfo#ipv6_linklocal?' do
+  it 'returns true for a link-local address' do
+    Addrinfo.ip('fe80::').ipv6_linklocal?.should == true
+    Addrinfo.ip('fe81::').ipv6_linklocal?.should == true
+    Addrinfo.ip('fe8f::').ipv6_linklocal?.should == true
+    Addrinfo.ip('fe80::1').ipv6_linklocal?.should == true
+  end
+
+  it 'returns false for a regular address' do
+    Addrinfo.ip('::1').ipv6_linklocal?.should == false
+  end
+
+  it 'returns false for an IPv4 address' do
+    Addrinfo.ip('127.0.0.1').ipv6_linklocal?.should == false
+  end
+end
diff --git a/spec/ruby/library/socket/addrinfo/ipv6_loopback_spec.rb b/spec/ruby/library/socket/addrinfo/ipv6_loopback_spec.rb
index e078bce30c..9ff8f107bf 100644
--- a/spec/ruby/library/socket/addrinfo/ipv6_loopback_spec.rb
+++ b/spec/ruby/library/socket/addrinfo/ipv6_loopback_spec.rb
@@ -1,5 +1,4 @@
-require_relative '../../../spec_helper'
-require 'socket'
+require_relative '../spec_helper'
 
 describe "Addrinfo#ipv6_loopback?" do
   describe "for an ipv4 socket" do
@@ -8,7 +7,7 @@ describe "Addrinfo#ipv6_loopback?" do
       @other    = Addrinfo.tcp("0.0.0.0", 80)
     end
 
-    it "returns true for the loopback address" do
+    it "returns false for the loopback address" do
       @loopback.ipv6_loopback?.should be_false
     end
 
@@ -23,7 +22,7 @@ describe "Addrinfo#ipv6_loopback?" do
       @other    = Addrinfo.tcp("::", 80)
     end
 
-    it "returns false for the loopback address" do
+    it "returns true for the loopback address" do
       @loopback.ipv6_loopback?.should be_true
     end
 
@@ -32,7 +31,7 @@ describe "Addrinfo#ipv6_loopback?" do
     end
   end
 
-  platform_is_not :windows do
+  with_feature :unix_socket do
     describe "for a unix socket" do
       before :each do
         @addrinfo = Addrinfo.unix("/tmp/sock")
diff --git a/spec/ruby/library/socket/addrinfo/ipv6_mc_global_spec.rb b/spec/ruby/library/socket/addrinfo/ipv6_mc_global_spec.rb
new file mode 100644
index 0000000000..9c8e4dccb4
--- /dev/null
+++ b/spec/ruby/library/socket/addrinfo/ipv6_mc_global_spec.rb
@@ -0,0 +1,20 @@
+require_relative '../spec_helper'
+
+describe 'Addrinfo#ipv6_mc_global?' do
+  it 'returns true for a multi-cast address in the global scope' do
+    Addrinfo.ip('ff1e::').ipv6_mc_global?.should == true
+    Addrinfo.ip('fffe::').ipv6_mc_global?.should == true
+    Addrinfo.ip('ff0e::').ipv6_mc_global?.should == true
+    Addrinfo.ip('ff1e::1').ipv6_mc_global?.should == true
+  end
+
+  it 'returns false for a regular IPv6 address' do
+    Addrinfo.ip('::1').ipv6_mc_global?.should == false
+    Addrinfo.ip('ff1a::').ipv6_mc_global?.should == false
+    Addrinfo.ip('ff1f::1').ipv6_mc_global?.should == false
+  end
+
+  it 'returns false for an IPv4 address' do
+    Addrinfo.ip('127.0.0.1').ipv6_mc_global?.should == false
+  end
+end
diff --git a/spec/ruby/library/socket/addrinfo/ipv6_mc_linklocal_spec.rb b/spec/ruby/library/socket/addrinfo/ipv6_mc_linklocal_spec.rb
new file mode 100644
index 0000000000..dd52a9ad8b
--- /dev/null
+++ b/spec/ruby/library/socket/addrinfo/ipv6_mc_linklocal_spec.rb
@@ -0,0 +1,19 @@
+require_relative '../spec_helper'
+
+describe 'Addrinfo#ipv6_mc_linklocal?' do
+  it 'returns true for a multi-cast link-local address' do
+    Addrinfo.ip('ff12::').ipv6_mc_linklocal?.should == true
+    Addrinfo.ip('ff02::').ipv6_mc_linklocal?.should == true
+    Addrinfo.ip('fff2::').ipv6_mc_linklocal?.should == true
+    Addrinfo.ip('ff12::1').ipv6_mc_linklocal?.should == true
+  end
+
+  it 'returns false for a regular IPv6 address' do
+    Addrinfo.ip('::1').ipv6_mc_linklocal?.should == false
+    Addrinfo.ip('fff1::').ipv6_mc_linklocal?.should == false
+  end
+
+  it 'returns false for an IPv4 address' do
+    Addrinfo.ip('127.0.0.1').ipv6_mc_linklocal?.should == false
+  end
+end
diff --git a/spec/ruby/library/socket/addrinfo/ipv6_mc_nodelocal_spec.rb b/spec/ruby/library/socket/addrinfo/ipv6_mc_nodelocal_spec.rb
new file mode 100644
index 0000000000..b3cf5ffbab
--- /dev/null
+++ b/spec/ruby/library/socket/addrinfo/ipv6_mc_nodelocal_spec.rb
@@ -0,0 +1,18 @@
+require_relative '../spec_helper'
+
+describe 'Addrinfo#ipv6_mc_nodelocal?' do
+  it 'returns true for a multi-cast node-local address' do
+    Addrinfo.ip('ff11::').ipv6_mc_nodelocal?.should == true
+    Addrinfo.ip('ff01::').ipv6_mc_nodelocal?.should == true
+    Addrinfo.ip('fff1::').ipv6_mc_nodelocal?.should == true
+    Addrinfo.ip('ff11::1').ipv6_mc_nodelocal?.should == true
+  end
+
+  it 'returns false for a regular IPv6 address' do
+    Addrinfo.ip('::1').ipv6_mc_nodelocal?.should == false
+  end
+
+  it 'returns false for an IPv4 address' do
+    Addrinfo.ip('127.0.0.1').ipv6_mc_nodelocal?.should == false
+  end
+end
diff --git a/spec/ruby/library/socket/addrinfo/ipv6_mc_orglocal_spec.rb b/spec/ruby/library/socket/addrinfo/ipv6_mc_orglocal_spec.rb
new file mode 100644
index 0000000000..90653dd49c
--- /dev/null
+++ b/spec/ruby/library/socket/addrinfo/ipv6_mc_orglocal_spec.rb
@@ -0,0 +1,18 @@
+require_relative '../spec_helper'
+
+describe 'Addrinfo#ipv6_mc_orglocal?' do
+  it 'returns true for a multi-cast org-local address' do
+    Addrinfo.ip('ff18::').ipv6_mc_orglocal?.should == true
+    Addrinfo.ip('ff08::').ipv6_mc_orglocal?.should == true
+    Addrinfo.ip('fff8::').ipv6_mc_orglocal?.should == true
+    Addrinfo.ip('ff18::1').ipv6_mc_orglocal?.should == true
+  end
+
+  it 'returns false for a regular IPv6 address' do
+    Addrinfo.ip('::1').ipv6_mc_orglocal?.should == false
+  end
+
+  it 'returns false for an IPv4 address' do
+    Addrinfo.ip('127.0.0.1').ipv6_mc_orglocal?.should == false
+  end
+end
diff --git a/spec/ruby/library/socket/addrinfo/ipv6_mc_sitelocal_spec.rb b/spec/ruby/library/socket/addrinfo/ipv6_mc_sitelocal_spec.rb
new file mode 100644
index 0000000000..686b625e0d
--- /dev/null
+++ b/spec/ruby/library/socket/addrinfo/ipv6_mc_sitelocal_spec.rb
@@ -0,0 +1,18 @@
+require_relative '../spec_helper'
+
+describe 'Addrinfo#ipv6_mc_sitelocal?' do
+  it 'returns true for a multi-cast site-local address' do
+    Addrinfo.ip('ff15::').ipv6_mc_sitelocal?.should == true
+    Addrinfo.ip('ff05::').ipv6_mc_sitelocal?.should == true
+    Addrinfo.ip('fff5::').ipv6_mc_sitelocal?.should == true
+    Addrinfo.ip('ff15::1').ipv6_mc_sitelocal?.should == true
+  end
+
+  it 'returns false for a regular IPv6 address' do
+    Addrinfo.ip('::1').ipv6_mc_sitelocal?.should == false
+  end
+
+  it 'returns false for an IPv4 address' do
+    Addrinfo.ip('127.0.0.1').ipv6_mc_sitelocal?.should == false
+  end
+end
diff --git a/spec/ruby/library/socket/addrinfo/ipv6_multicast_spec.rb b/spec/ruby/library/socket/addrinfo/ipv6_multicast_spec.rb
index cdb6c798c0..c25322869c 100644
--- a/spec/ruby/library/socket/addrinfo/ipv6_multicast_spec.rb
+++ b/spec/ruby/library/socket/addrinfo/ipv6_multicast_spec.rb
@@ -1,5 +1,4 @@
-require_relative '../../../spec_helper'
-require 'socket'
+require_relative '../spec_helper'
 
 describe "Addrinfo#ipv6_multicast?" do
   describe "for an ipv4 socket" do
@@ -8,7 +7,7 @@ describe "Addrinfo#ipv6_multicast?" do
       @other     = Addrinfo.tcp("0.0.0.0", 80)
     end
 
-    it "returns true for the loopback address" do
+    it "returns true for a multicast address" do
       @multicast.ipv6_multicast?.should be_false
     end
 
@@ -18,21 +17,24 @@ describe "Addrinfo#ipv6_multicast?" do
   end
 
   describe "for an ipv6 socket" do
-    before :each do
-      @multicast = Addrinfo.tcp("ff02::1", 80)
-      @other     = Addrinfo.tcp("::", 80)
-    end
-
-    it "returns false for the loopback address" do
-      @multicast.ipv6_multicast?.should be_true
+    it "returns true for a multicast address" do
+      Addrinfo.ip('ff00::').ipv6_multicast?.should == true
+      Addrinfo.ip('ff00::1').ipv6_multicast?.should == true
+      Addrinfo.ip('ff08::1').ipv6_multicast?.should == true
+      Addrinfo.ip('fff8::1').ipv6_multicast?.should == true
+
+      Addrinfo.ip('ff02::').ipv6_multicast?.should == true
+      Addrinfo.ip('ff02::1').ipv6_multicast?.should == true
+      Addrinfo.ip('ff0f::').ipv6_multicast?.should == true
     end
 
     it "returns false for another address" do
-      @other.ipv6_multicast?.should be_false
+      Addrinfo.ip('::1').ipv6_multicast?.should == false
+      Addrinfo.ip('fe80::').ipv6_multicast?.should == false
     end
   end
 
-  platform_is_not :windows do
+  with_feature :unix_socket do
     describe "for a unix socket" do
       before :each do
         @addrinfo = Addrinfo.unix("/tmp/sock")
diff --git a/spec/ruby/library/socket/addrinfo/ipv6_sitelocal_spec.rb b/spec/ruby/library/socket/addrinfo/ipv6_sitelocal_spec.rb
new file mode 100644
index 0000000000..f0c382f00c
--- /dev/null
+++ b/spec/ruby/library/socket/addrinfo/ipv6_sitelocal_spec.rb
@@ -0,0 +1,18 @@
+require_relative '../spec_helper'
+
+describe 'Addrinfo#ipv6_sitelocal?' do
+  it 'returns true for a site-local address' do
+    Addrinfo.ip('feef::').ipv6_sitelocal?.should == true
+    Addrinfo.ip('fee0::').ipv6_sitelocal?.should == true
+    Addrinfo.ip('fee2::').ipv6_sitelocal?.should == true
+    Addrinfo.ip('feef::1').ipv6_sitelocal?.should == true
+  end
+
+  it 'returns false for a regular IPv6 address' do
+    Addrinfo.ip('::1').ipv6_sitelocal?.should == false
+  end
+
+  it 'returns false for an IPv4 address' do
+    Addrinfo.ip('127.0.0.1').ipv6_sitelocal?.should == false
+  end
+end
diff --git a/spec/ruby/library/socket/addrinfo/ipv6_spec.rb b/spec/ruby/library/socket/addrinfo/ipv6_spec.rb
index 02908b793f..131e38849c 100644
--- a/spec/ruby/library/socket/addrinfo/ipv6_spec.rb
+++ b/spec/ruby/library/socket/addrinfo/ipv6_spec.rb
@@ -1,5 +1,4 @@
-require_relative '../../../spec_helper'
-require 'socket'
+require_relative '../spec_helper'
 
 describe "Addrinfo#ipv6?" do
   describe "for an ipv4 socket" do
@@ -22,7 +21,7 @@ describe "Addrinfo#ipv6?" do
     end
   end
 
-  platform_is_not :windows do
+  with_feature :unix_socket do
     describe "for a unix socket" do
       before :each do
         @addrinfo = Addrinfo.unix("/tmp/sock")
diff --git a/spec/ruby/library/socket/addrinfo/ipv6_to_ipv4_spec.rb b/spec/ruby/library/socket/addrinfo/ipv6_to_ipv4_spec.rb
new file mode 100644
index 0000000000..48c1706459
--- /dev/null
+++ b/spec/ruby/library/socket/addrinfo/ipv6_to_ipv4_spec.rb
@@ -0,0 +1,66 @@
+require_relative '../spec_helper'
+
+describe 'Addrinfo#ipv6_to_ipv4' do
+  it 'returns an Addrinfo for ::192.168.1.1' do
+    addr = Addrinfo.ip('::192.168.1.1').ipv6_to_ipv4
+
+    addr.should be_an_instance_of(Addrinfo)
+
+    addr.afamily.should    == Socket::AF_INET
+    addr.ip_address.should == '192.168.1.1'
+  end
+
+  it 'returns an Addrinfo for ::0.0.1.1' do
+    addr = Addrinfo.ip('::0.0.1.1').ipv6_to_ipv4
+
+    addr.should be_an_instance_of(Addrinfo)
+
+    addr.afamily.should    == Socket::AF_INET
+    addr.ip_address.should == '0.0.1.1'
+  end
+
+  it 'returns an Addrinfo for ::0.0.1.0' do
+    addr = Addrinfo.ip('::0.0.1.0').ipv6_to_ipv4
+
+    addr.should be_an_instance_of(Addrinfo)
+
+    addr.afamily.should    == Socket::AF_INET
+    addr.ip_address.should == '0.0.1.0'
+  end
+
+  it 'returns an Addrinfo for ::0.1.0.0' do
+    addr = Addrinfo.ip('::0.1.0.0').ipv6_to_ipv4
+
+    addr.should be_an_instance_of(Addrinfo)
+
+    addr.afamily.should    == Socket::AF_INET
+    addr.ip_address.should == '0.1.0.0'
+  end
+
+  it 'returns an Addrinfo for ::ffff:192.168.1.1' do
+    addr = Addrinfo.ip('::ffff:192.168.1.1').ipv6_to_ipv4
+
+    addr.should be_an_instance_of(Addrinfo)
+
+    addr.afamily.should    == Socket::AF_INET
+    addr.ip_address.should == '192.168.1.1'
+  end
+
+  it 'returns nil for ::0.0.0.1' do
+    Addrinfo.ip('::0.0.0.1').ipv6_to_ipv4.should be_nil
+  end
+
+  it 'returns nil for a pure IPv6 Addrinfo' do
+    Addrinfo.ip('::1').ipv6_to_ipv4.should be_nil
+  end
+
+  it 'returns nil for an IPv4 Addrinfo' do
+    Addrinfo.ip('192.168.1.1').ipv6_to_ipv4.should be_nil
+  end
+
+  with_feature :unix_socket do
+    it 'returns nil for a UNIX Addrinfo' do
+      Addrinfo.unix('foo').ipv6_to_ipv4.should be_nil
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/addrinfo/ipv6_unique_local_spec.rb b/spec/ruby/library/socket/addrinfo/ipv6_unique_local_spec.rb
new file mode 100644
index 0000000000..b80a15fcb0
--- /dev/null
+++ b/spec/ruby/library/socket/addrinfo/ipv6_unique_local_spec.rb
@@ -0,0 +1,18 @@
+require_relative '../spec_helper'
+
+describe 'Addrinfo#ipv6_unique_local?' do
+  it 'returns true for an unique local IPv6 address' do
+    Addrinfo.ip('fc00::').ipv6_unique_local?.should == true
+    Addrinfo.ip('fd00::').ipv6_unique_local?.should == true
+    Addrinfo.ip('fcff::').ipv6_unique_local?.should == true
+  end
+
+  it 'returns false for a regular IPv6 address' do
+    Addrinfo.ip('::1').ipv6_unique_local?.should == false
+    Addrinfo.ip('fe00::').ipv6_unique_local?.should == false
+  end
+
+  it 'returns false for an IPv4 address' do
+    Addrinfo.ip('127.0.0.1').ipv6_unique_local?.should == false
+  end
+end
diff --git a/spec/ruby/library/socket/addrinfo/ipv6_unspecified_spec.rb b/spec/ruby/library/socket/addrinfo/ipv6_unspecified_spec.rb
new file mode 100644
index 0000000000..dd79d57503
--- /dev/null
+++ b/spec/ruby/library/socket/addrinfo/ipv6_unspecified_spec.rb
@@ -0,0 +1,15 @@
+require_relative '../spec_helper'
+
+describe 'Addrinfo#ipv6_unspecified?' do
+  it 'returns true for an unspecified IPv6 address' do
+    Addrinfo.ip('::').ipv6_unspecified?.should == true
+  end
+
+  it 'returns false for a regular IPv6 address' do
+    Addrinfo.ip('::1').ipv6_unspecified?.should == false
+  end
+
+  it 'returns false for an IPv4 address' do
+    Addrinfo.ip('127.0.0.1').ipv6_unspecified?.should == false
+  end
+end
diff --git a/spec/ruby/library/socket/addrinfo/ipv6_v4compat_spec.rb b/spec/ruby/library/socket/addrinfo/ipv6_v4compat_spec.rb
new file mode 100644
index 0000000000..ab8388a21b
--- /dev/null
+++ b/spec/ruby/library/socket/addrinfo/ipv6_v4compat_spec.rb
@@ -0,0 +1,20 @@
+require_relative '../spec_helper'
+
+describe 'Addrinfo#ipv6_v4compat?' do
+  it 'returns true for an IPv4 compatible address' do
+    Addrinfo.ip('::127.0.0.1').ipv6_v4compat?.should == true
+    Addrinfo.ip('::192.168.1.1').ipv6_v4compat?.should == true
+  end
+
+  it 'returns false for an IPv4 mapped address' do
+    Addrinfo.ip('::ffff:192.168.1.1').ipv6_v4compat?.should == false
+  end
+
+  it 'returns false for a regular IPv6 address' do
+    Addrinfo.ip('::1').ipv6_v4compat?.should == false
+  end
+
+  it 'returns false for an IPv4 address' do
+    Addrinfo.ip('127.0.0.1').ipv6_v4compat?.should == false
+  end
+end
diff --git a/spec/ruby/library/socket/addrinfo/ipv6_v4mapped_spec.rb b/spec/ruby/library/socket/addrinfo/ipv6_v4mapped_spec.rb
new file mode 100644
index 0000000000..82b272c165
--- /dev/null
+++ b/spec/ruby/library/socket/addrinfo/ipv6_v4mapped_spec.rb
@@ -0,0 +1,20 @@
+require_relative '../spec_helper'
+
+describe 'Addrinfo#ipv6_v4mapped?' do
+  it 'returns true for an IPv4 compatible address' do
+    Addrinfo.ip('::ffff:192.168.1.1').ipv6_v4mapped?.should == true
+  end
+
+  it 'returns false for an IPv4 compatible address' do
+    Addrinfo.ip('::192.168.1.1').ipv6_v4mapped?.should == false
+    Addrinfo.ip('::127.0.0.1').ipv6_v4mapped?.should == false
+  end
+
+  it 'returns false for a regular IPv6 address' do
+    Addrinfo.ip('::1').ipv6_v4mapped?.should == false
+  end
+
+  it 'returns false for an IPv4 address' do
+    Addrinfo.ip('127.0.0.1').ipv6_v4mapped?.should == false
+  end
+end
diff --git a/spec/ruby/library/socket/addrinfo/listen_spec.rb b/spec/ruby/library/socket/addrinfo/listen_spec.rb
new file mode 100644
index 0000000000..714a96ed6c
--- /dev/null
+++ b/spec/ruby/library/socket/addrinfo/listen_spec.rb
@@ -0,0 +1,34 @@
+require_relative '../spec_helper'
+
+describe 'Addrinfo#listen' do
+  before do
+    @addr   = Addrinfo.tcp('127.0.0.1', 0)
+    @socket = nil
+  end
+
+  after do
+    @socket.close if @socket
+  end
+
+  it 'returns a Socket when no block is given' do
+    @socket = @addr.listen
+
+    @socket.should be_an_instance_of(Socket)
+  end
+
+  it 'yields the Socket if a block is given' do
+    @addr.listen do |socket|
+      socket.should be_an_instance_of(Socket)
+    end
+  end
+
+  it 'closes the socket if a block is given' do
+    socket = nil
+
+    @addr.listen do |sock|
+      socket = sock
+    end
+
+    socket.closed?.should == true
+  end
+end
diff --git a/spec/ruby/library/socket/addrinfo/marshal_dump_spec.rb b/spec/ruby/library/socket/addrinfo/marshal_dump_spec.rb
new file mode 100644
index 0000000000..2d69a33b53
--- /dev/null
+++ b/spec/ruby/library/socket/addrinfo/marshal_dump_spec.rb
@@ -0,0 +1,82 @@
+require_relative '../spec_helper'
+
+describe 'Addrinfo#marshal_dump' do
+  describe 'using an IP Addrinfo' do
+    before do
+      @addr = Addrinfo.getaddrinfo('localhost', 80, :INET, :STREAM,
+                                   Socket::IPPROTO_TCP, Socket::AI_CANONNAME)[0]
+    end
+
+    it 'returns an Array' do
+      @addr.marshal_dump.should be_an_instance_of(Array)
+    end
+
+    describe 'the returned Array' do
+      before do
+        @array = @addr.marshal_dump
+      end
+
+      it 'includes the address family as the 1st value' do
+        @array[0].should == 'AF_INET'
+      end
+
+      it 'includes the IP address as the 2nd value' do
+        @array[1].should == [@addr.ip_address, @addr.ip_port.to_s]
+      end
+
+      it 'includes the protocol family as the 3rd value' do
+        @array[2].should == 'PF_INET'
+      end
+
+      it 'includes the socket type as the 4th value' do
+        @array[3].should == 'SOCK_STREAM'
+      end
+
+      it 'includes the protocol as the 5th value' do
+        @array[4].should == 'IPPROTO_TCP'
+      end
+
+      it 'includes the canonical name as the 6th value' do
+        @array[5].should == @addr.canonname
+      end
+    end
+  end
+
+  with_feature :unix_socket do
+    describe 'using a UNIX Addrinfo' do
+      before do
+        @addr = Addrinfo.unix('foo')
+      end
+
+      it 'returns an Array' do
+        @addr.marshal_dump.should be_an_instance_of(Array)
+      end
+
+      describe 'the returned Array' do
+        before do
+          @array = @addr.marshal_dump
+        end
+
+        it 'includes the address family as the 1st value' do
+          @array[0].should == 'AF_UNIX'
+        end
+
+        it 'includes the UNIX path as the 2nd value' do
+          @array[1].should == @addr.unix_path
+        end
+
+        it 'includes the protocol family as the 3rd value' do
+          @array[2].should == 'PF_UNIX'
+        end
+
+        it 'includes the socket type as the 4th value' do
+          @array[3].should == 'SOCK_STREAM'
+        end
+
+        it 'includes the protocol as the 5th value' do
+          @array[4].should == 0
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/addrinfo/marshal_load_spec.rb b/spec/ruby/library/socket/addrinfo/marshal_load_spec.rb
new file mode 100644
index 0000000000..aa20865224
--- /dev/null
+++ b/spec/ruby/library/socket/addrinfo/marshal_load_spec.rb
@@ -0,0 +1,35 @@
+require_relative '../spec_helper'
+
+describe 'Addrinfo#marshal_load' do
+  describe 'using an IP address' do
+    it 'returns a new Addrinfo' do
+      source = Addrinfo.getaddrinfo('localhost', 80, :INET, :STREAM,
+                                    Socket::IPPROTO_TCP, Socket::AI_CANONNAME)[0]
+
+      addr = Marshal.load(Marshal.dump(source))
+
+      addr.afamily.should    == source.afamily
+      addr.pfamily.should    == source.pfamily
+      addr.socktype.should   == source.socktype
+      addr.protocol.should   == source.protocol
+      addr.ip_address.should == source.ip_address
+      addr.ip_port.should    == source.ip_port
+      addr.canonname.should  == source.canonname
+    end
+  end
+
+  with_feature :unix_socket do
+    describe 'using a UNIX socket' do
+      it 'returns a new Addrinfo' do
+        source = Addrinfo.unix('foo')
+        addr   = Marshal.load(Marshal.dump(source))
+
+        addr.afamily.should   == source.afamily
+        addr.pfamily.should   == source.pfamily
+        addr.socktype.should  == source.socktype
+        addr.protocol.should  == source.protocol
+        addr.unix_path.should == source.unix_path
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/addrinfo/pfamily_spec.rb b/spec/ruby/library/socket/addrinfo/pfamily_spec.rb
index 6a6bd542f7..984744a964 100644
--- a/spec/ruby/library/socket/addrinfo/pfamily_spec.rb
+++ b/spec/ruby/library/socket/addrinfo/pfamily_spec.rb
@@ -1,7 +1,12 @@
-require_relative '../../../spec_helper'
-require 'socket'
+require_relative '../spec_helper'
 
 describe "Addrinfo#pfamily" do
+  it 'returns PF_UNSPEC as the default socket family' do
+    sockaddr = Socket.pack_sockaddr_in(80, 'localhost')
+
+    Addrinfo.new(sockaddr).pfamily.should == Socket::PF_UNSPEC
+  end
+
   describe "for an ipv4 socket" do
 
     before :each do
@@ -24,7 +29,7 @@ describe "Addrinfo#pfamily" do
     end
   end
 
-  platform_is_not :windows do
+  with_feature :unix_socket do
     describe "for a unix socket" do
       before :each do
         @addrinfo = Addrinfo.unix("/tmp/sock")
diff --git a/spec/ruby/library/socket/addrinfo/protocol_spec.rb b/spec/ruby/library/socket/addrinfo/protocol_spec.rb
index 72f4f93b5c..ea143fc4a8 100644
--- a/spec/ruby/library/socket/addrinfo/protocol_spec.rb
+++ b/spec/ruby/library/socket/addrinfo/protocol_spec.rb
@@ -1,30 +1,16 @@
-require_relative '../../../spec_helper'
-require 'socket'
+require_relative '../spec_helper'
 
 describe "Addrinfo#protocol" do
-  describe "for an ipv4 socket" do
-
-    before :each do
-      @addrinfo = Addrinfo.tcp("127.0.0.1", 80)
-    end
-
-    it "returns Socket::IPPROTO_TCP" do
-      @addrinfo.protocol.should == Socket::IPPROTO_TCP
-    end
-
+  it 'returns 0 by default' do
+    Addrinfo.ip('127.0.0.1').protocol.should == 0
   end
 
-  describe "for an ipv6 socket" do
-    before :each do
-      @addrinfo = Addrinfo.tcp("::1", 80)
-    end
-
-    it "returns Socket::IPPROTO_TCP" do
-      @addrinfo.protocol.should == Socket::IPPROTO_TCP
-    end
+  it 'returns a custom protocol when given' do
+    Addrinfo.tcp('127.0.0.1', 80).protocol.should == Socket::IPPROTO_TCP
+    Addrinfo.tcp('::1', 80).protocol.should == Socket::IPPROTO_TCP
   end
 
-  platform_is_not :windows do
+  with_feature :unix_socket do
     describe "for a unix socket" do
       before :each do
         @addrinfo = Addrinfo.unix("/tmp/sock")
diff --git a/spec/ruby/library/socket/addrinfo/shared/to_sockaddr.rb b/spec/ruby/library/socket/addrinfo/shared/to_sockaddr.rb
index 86819a31b0..c32da5986d 100644
--- a/spec/ruby/library/socket/addrinfo/shared/to_sockaddr.rb
+++ b/spec/ruby/library/socket/addrinfo/shared/to_sockaddr.rb
@@ -6,7 +6,7 @@ describe :socket_addrinfo_to_sockaddr, :shared => true do
     end
 
     it "returns a sockaddr packed structure" do
-      @addrinfo.send(@method).should be_kind_of(String)
+      @addrinfo.send(@method).should == Socket.sockaddr_in(80, '127.0.0.1')
     end
   end
 
@@ -16,20 +16,36 @@ describe :socket_addrinfo_to_sockaddr, :shared => true do
     end
 
     it "returns a sockaddr packed structure" do
-      @addrinfo.send(@method).should be_kind_of(String)
+      @addrinfo.send(@method).should == Socket.sockaddr_in(80, '::1')
     end
   end
 
-  platform_is_not :windows do
+  with_feature :unix_socket do
     describe "for a unix socket" do
       before :each do
         @addrinfo = Addrinfo.unix("/tmp/sock")
       end
 
       it "returns a sockaddr packed structure" do
-        @addrinfo.send(@method).should be_kind_of(String)
+        @addrinfo.send(@method).should == Socket.sockaddr_un('/tmp/sock')
       end
     end
   end
 
+  describe 'using a Addrinfo with just an IP address' do
+    it 'returns a String' do
+      addr = Addrinfo.ip('127.0.0.1')
+
+      addr.send(@method).should == Socket.sockaddr_in(0, '127.0.0.1')
+    end
+  end
+
+  describe 'using a Addrinfo without an IP and port' do
+    it 'returns a String' do
+      addr = Addrinfo.new(['AF_INET', 0, '', ''])
+
+      addr.send(@method).should == Socket.sockaddr_in(0, '')
+    end
+  end
+
 end
diff --git a/spec/ruby/library/socket/addrinfo/socktype_spec.rb b/spec/ruby/library/socket/addrinfo/socktype_spec.rb
index c38c629c96..b994bea140 100644
--- a/spec/ruby/library/socket/addrinfo/socktype_spec.rb
+++ b/spec/ruby/library/socket/addrinfo/socktype_spec.rb
@@ -1,30 +1,15 @@
-require_relative '../../../spec_helper'
-require 'socket'
+require_relative '../spec_helper'
 
 describe "Addrinfo#socktype" do
-  describe "for an ipv4 socket" do
-
-    before :each do
-      @addrinfo = Addrinfo.tcp("127.0.0.1", 80)
-    end
-
-    it "returns Socket::SOCK_STREAM" do
-      @addrinfo.socktype.should == Socket::SOCK_STREAM
-    end
-
+  it 'returns 0 by default' do
+    Addrinfo.ip('127.0.0.1').socktype.should == 0
   end
 
-  describe "for an ipv6 socket" do
-    before :each do
-      @addrinfo = Addrinfo.tcp("::1", 80)
-    end
-
-    it "returns Socket::SOCK_STREAM" do
-      @addrinfo.socktype.should == Socket::SOCK_STREAM
-    end
+  it 'returns the socket type when given' do
+    Addrinfo.tcp('127.0.0.1', 80).socktype.should == Socket::SOCK_STREAM
   end
 
-  platform_is_not :windows do
+  with_feature :unix_socket do
     describe "for a unix socket" do
       before :each do
         @addrinfo = Addrinfo.unix("/tmp/sock")
diff --git a/spec/ruby/library/socket/addrinfo/tcp_spec.rb b/spec/ruby/library/socket/addrinfo/tcp_spec.rb
index 39406b64ee..c74c9c21c2 100644
--- a/spec/ruby/library/socket/addrinfo/tcp_spec.rb
+++ b/spec/ruby/library/socket/addrinfo/tcp_spec.rb
@@ -1,20 +1,34 @@
-require_relative '../../../spec_helper'
-require 'socket'
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
 
-describe "Addrinfo.tcp" do
+describe 'Addrinfo.tcp' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    it 'returns an Addrinfo instance' do
+      Addrinfo.tcp(ip_address, 80).should be_an_instance_of(Addrinfo)
+    end
 
-  before :each do
-    @addrinfo = Addrinfo.tcp("localhost", "smtp")
-  end
+    it 'sets the IP address' do
+      Addrinfo.tcp(ip_address, 80).ip_address.should == ip_address
+    end
 
-  it "creates a addrinfo for a tcp socket" do
-    ["::1", "127.0.0.1"].should include(@addrinfo.ip_address)
-    [Socket::PF_INET, Socket::PF_INET6].should include(@addrinfo.pfamily)
-    @addrinfo.ip_port.should == 25
-    @addrinfo.socktype.should == Socket::SOCK_STREAM
-    platform_is_not :solaris do
-      @addrinfo.protocol.should == Socket::IPPROTO_TCP
+    it 'sets the port' do
+      Addrinfo.tcp(ip_address, 80).ip_port.should == 80
+    end
+
+    it 'sets the address family' do
+      Addrinfo.tcp(ip_address, 80).afamily.should == family
     end
-  end
 
+    it 'sets the protocol family' do
+      Addrinfo.tcp(ip_address, 80).pfamily.should == family
+    end
+
+    it 'sets the socket type' do
+      Addrinfo.tcp(ip_address, 80).socktype.should == Socket::SOCK_STREAM
+    end
+
+    it 'sets the socket protocol' do
+      Addrinfo.tcp(ip_address, 80).protocol.should == Socket::IPPROTO_TCP
+    end
+  end
 end
diff --git a/spec/ruby/library/socket/addrinfo/to_s_spec.rb b/spec/ruby/library/socket/addrinfo/to_s_spec.rb
index 5ac31e3099..ddf994e051 100644
--- a/spec/ruby/library/socket/addrinfo/to_s_spec.rb
+++ b/spec/ruby/library/socket/addrinfo/to_s_spec.rb
@@ -1,6 +1,5 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative 'shared/to_sockaddr'
-require 'socket'
 
 describe "Addrinfo#to_s" do
   it_behaves_like :socket_addrinfo_to_sockaddr, :to_s
diff --git a/spec/ruby/library/socket/addrinfo/to_sockaddr_spec.rb b/spec/ruby/library/socket/addrinfo/to_sockaddr_spec.rb
index eee9f961b2..b9f75454bd 100644
--- a/spec/ruby/library/socket/addrinfo/to_sockaddr_spec.rb
+++ b/spec/ruby/library/socket/addrinfo/to_sockaddr_spec.rb
@@ -1,6 +1,5 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative 'shared/to_sockaddr'
-require 'socket'
 
 describe "Addrinfo#to_sockaddr" do
   it_behaves_like :socket_addrinfo_to_sockaddr, :to_sockaddr
diff --git a/spec/ruby/library/socket/addrinfo/udp_spec.rb b/spec/ruby/library/socket/addrinfo/udp_spec.rb
index 237afdbc61..b05cbf9b0b 100644
--- a/spec/ruby/library/socket/addrinfo/udp_spec.rb
+++ b/spec/ruby/library/socket/addrinfo/udp_spec.rb
@@ -1,20 +1,36 @@
-require_relative '../../../spec_helper'
-require 'socket'
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
 
-describe "Addrinfo.udp" do
+describe 'Addrinfo.udp' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    it 'returns an Addrinfo instance' do
+      Addrinfo.udp(ip_address, 80).should be_an_instance_of(Addrinfo)
+    end
 
-  before :each do
-    @addrinfo = Addrinfo.udp("localhost", "daytime")
-  end
+    it 'sets the IP address' do
+      Addrinfo.udp(ip_address, 80).ip_address.should == ip_address
+    end
+
+    it 'sets the port' do
+      Addrinfo.udp(ip_address, 80).ip_port.should == 80
+    end
+
+    it 'sets the address family' do
+      Addrinfo.udp(ip_address, 80).afamily.should == family
+    end
+
+    it 'sets the protocol family' do
+      Addrinfo.udp(ip_address, 80).pfamily.should == family
+    end
+
+    it 'sets the socket type' do
+      Addrinfo.udp(ip_address, 80).socktype.should == Socket::SOCK_DGRAM
+    end
 
-  it "creates a addrinfo for a tcp socket" do
-    ["::1", "127.0.0.1"].should include(@addrinfo.ip_address)
-    [Socket::PF_INET, Socket::PF_INET6].should include(@addrinfo.pfamily)
-    @addrinfo.ip_port.should == 13
-    @addrinfo.socktype.should == Socket::SOCK_DGRAM
     platform_is_not :solaris do
-      @addrinfo.protocol.should == Socket::IPPROTO_UDP
+      it 'sets the socket protocol' do
+        Addrinfo.udp(ip_address, 80).protocol.should == Socket::IPPROTO_UDP
+      end
     end
   end
-
 end
diff --git a/spec/ruby/library/socket/addrinfo/unix_path_spec.rb b/spec/ruby/library/socket/addrinfo/unix_path_spec.rb
index 1168a225b0..0f25881724 100644
--- a/spec/ruby/library/socket/addrinfo/unix_path_spec.rb
+++ b/spec/ruby/library/socket/addrinfo/unix_path_spec.rb
@@ -1,7 +1,6 @@
-require_relative '../../../spec_helper'
-require 'socket'
+require_relative '../spec_helper'
 
-platform_is_not :windows do
+with_feature :unix_socket do
   describe "Addrinfo#unix_path" do
     describe "for an ipv4 socket" do
 
@@ -25,15 +24,13 @@ platform_is_not :windows do
       end
     end
 
-    platform_is_not :windows do
-      describe "for a unix socket" do
-        before :each do
-          @addrinfo = Addrinfo.unix("/tmp/sock")
-        end
+    describe "for a unix socket" do
+      before :each do
+        @addrinfo = Addrinfo.unix("/tmp/sock")
+      end
 
-        it "returns the socket path" do
-          @addrinfo.unix_path.should == "/tmp/sock"
-        end
+      it "returns the socket path" do
+        @addrinfo.unix_path.should == "/tmp/sock"
       end
     end
   end
diff --git a/spec/ruby/library/socket/addrinfo/unix_spec.rb b/spec/ruby/library/socket/addrinfo/unix_spec.rb
index 599c20e815..4596ece17e 100644
--- a/spec/ruby/library/socket/addrinfo/unix_spec.rb
+++ b/spec/ruby/library/socket/addrinfo/unix_spec.rb
@@ -1,18 +1,35 @@
-require_relative '../../../spec_helper'
-require 'socket'
+require_relative '../spec_helper'
 
-describe "Addrinfo.unix" do
+with_feature :unix_socket do
+  describe 'Addrinfo.unix' do
+    it 'returns an Addrinfo instance' do
+      Addrinfo.unix('socket').should be_an_instance_of(Addrinfo)
+    end
 
-  platform_is_not :windows do
-    before :each do
-      @addrinfo = Addrinfo.unix("/tmp/sock")
+    it 'sets the IP address' do
+      Addrinfo.unix('socket').unix_path.should == 'socket'
+    end
+
+    it 'sets the address family' do
+      Addrinfo.unix('socket').afamily.should == Socket::AF_UNIX
+    end
+
+    it 'sets the protocol family' do
+      Addrinfo.unix('socket').pfamily.should == Socket::PF_UNIX
+    end
+
+    it 'sets the socket type' do
+      Addrinfo.unix('socket').socktype.should == Socket::SOCK_STREAM
+    end
+
+    it 'sets a custom socket type' do
+      addr = Addrinfo.unix('socket', Socket::SOCK_DGRAM)
+
+      addr.socktype.should == Socket::SOCK_DGRAM
     end
 
-    it "creates a addrinfo for a unix socket" do
-      @addrinfo.pfamily.should == Socket::PF_UNIX
-      @addrinfo.socktype.should == Socket::SOCK_STREAM
-      @addrinfo.protocol.should == 0
-      @addrinfo.unix_path.should == "/tmp/sock"
+    it 'sets the socket protocol to 0' do
+      Addrinfo.unix('socket').protocol.should == 0
     end
   end
 end
diff --git a/spec/ruby/library/socket/ancillarydata/cmsg_is_spec.rb b/spec/ruby/library/socket/ancillarydata/cmsg_is_spec.rb
new file mode 100644
index 0000000000..e423e0ef05
--- /dev/null
+++ b/spec/ruby/library/socket/ancillarydata/cmsg_is_spec.rb
@@ -0,0 +1,31 @@
+require_relative '../spec_helper'
+
+with_feature :ancillary_data do
+  describe 'Socket::AncillaryData#cmsg_is?' do
+    describe 'using :INET, :IP, :TTL as the family, level, and type' do
+      before do
+        @data = Socket::AncillaryData.new(:INET, :IP, :TTL, '')
+      end
+
+      it 'returns true when comparing with IPPROTO_IP and IP_TTL' do
+        @data.cmsg_is?(Socket::IPPROTO_IP, Socket::IP_TTL).should == true
+      end
+
+      it 'returns true when comparing with :IP and :TTL' do
+        @data.cmsg_is?(:IP, :TTL).should == true
+      end
+
+      it 'returns false when comparing with :IP and :PKTINFO' do
+        @data.cmsg_is?(:IP, :PKTINFO).should == false
+      end
+
+      it 'returns false when comparing with :SOCKET and :RIGHTS' do
+        @data.cmsg_is?(:SOCKET, :RIGHTS).should == false
+      end
+
+      it 'raises SocketError when comparign with :IPV6 and :RIGHTS' do
+        lambda { @data.cmsg_is?(:IPV6, :RIGHTS) }.should raise_error(SocketError)
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/ancillarydata/data_spec.rb b/spec/ruby/library/socket/ancillarydata/data_spec.rb
new file mode 100644
index 0000000000..5a1a446dd5
--- /dev/null
+++ b/spec/ruby/library/socket/ancillarydata/data_spec.rb
@@ -0,0 +1,9 @@
+require_relative '../spec_helper'
+
+with_feature :ancillary_data do
+  describe 'Socket::AncillaryData#data' do
+    it 'returns the data as a String' do
+      Socket::AncillaryData.new(:INET, :SOCKET, :RIGHTS, 'ugh').data.should == 'ugh'
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/ancillarydata/family_spec.rb b/spec/ruby/library/socket/ancillarydata/family_spec.rb
new file mode 100644
index 0000000000..b742e0c6db
--- /dev/null
+++ b/spec/ruby/library/socket/ancillarydata/family_spec.rb
@@ -0,0 +1,9 @@
+require_relative '../spec_helper'
+
+with_feature :ancillary_data do
+  describe 'Socket::AncillaryData#family' do
+    it 'returns the family as a Fixnum' do
+      Socket::AncillaryData.new(:INET, :SOCKET, :RIGHTS, '').family.should == Socket::AF_INET
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/ancillarydata/initialize_spec.rb b/spec/ruby/library/socket/ancillarydata/initialize_spec.rb
new file mode 100644
index 0000000000..659a29e24a
--- /dev/null
+++ b/spec/ruby/library/socket/ancillarydata/initialize_spec.rb
@@ -0,0 +1,282 @@
+require_relative '../spec_helper'
+
+with_feature :ancillary_data do
+  describe 'Socket::AncillaryData#initialize' do
+    describe 'using Fixnums for the family, level, and type' do
+      before do
+        @data = Socket::AncillaryData
+          .new(Socket::AF_INET, Socket::IPPROTO_IP, Socket::IP_RECVTTL, 'ugh')
+      end
+
+      it 'sets the address family' do
+        @data.family.should == Socket::AF_INET
+      end
+
+      it 'sets the message level' do
+        @data.level.should == Socket::IPPROTO_IP
+      end
+
+      it 'sets the message type' do
+        @data.type.should == Socket::IP_RECVTTL
+      end
+
+      it 'sets the data' do
+        @data.data.should == 'ugh'
+      end
+    end
+
+    describe 'using Symbols for the family, level, and type' do
+      before do
+        @data = Socket::AncillaryData.new(:INET, :IPPROTO_IP, :RECVTTL, 'ugh')
+      end
+
+      it 'sets the address family' do
+        @data.family.should == Socket::AF_INET
+      end
+
+      it 'sets the message level' do
+        @data.level.should == Socket::IPPROTO_IP
+      end
+
+      it 'sets the message type' do
+        @data.type.should == Socket::IP_RECVTTL
+      end
+
+      it 'sets the data' do
+        @data.data.should == 'ugh'
+      end
+    end
+
+    describe 'using Strings for the family, level, and type' do
+      before do
+        @data = Socket::AncillaryData.new('INET', 'IPPROTO_IP', 'RECVTTL', 'ugh')
+      end
+
+      it 'sets the address family' do
+        @data.family.should == Socket::AF_INET
+      end
+
+      it 'sets the message level' do
+        @data.level.should == Socket::IPPROTO_IP
+      end
+
+      it 'sets the message type' do
+        @data.type.should == Socket::IP_RECVTTL
+      end
+
+      it 'sets the data' do
+        @data.data.should == 'ugh'
+      end
+    end
+
+    describe 'using custom objects with a to_str method for the family, level, and type' do
+      before do
+        fmock = mock(:family)
+        lmock = mock(:level)
+        tmock = mock(:type)
+        dmock = mock(:data)
+
+        fmock.stub!(:to_str).and_return('INET')
+        lmock.stub!(:to_str).and_return('IP')
+        tmock.stub!(:to_str).and_return('RECVTTL')
+        dmock.stub!(:to_str).and_return('ugh')
+
+        @data = Socket::AncillaryData.new(fmock, lmock, tmock, dmock)
+      end
+
+      it 'sets the address family' do
+        @data.family.should == Socket::AF_INET
+      end
+
+      it 'sets the message level' do
+        @data.level.should == Socket::IPPROTO_IP
+      end
+
+      it 'sets the message type' do
+        @data.type.should == Socket::IP_RECVTTL
+      end
+
+      it 'sets the data' do
+        @data.data.should == 'ugh'
+      end
+    end
+
+    describe 'using :AF_INET as the family and :SOCKET as the level' do
+      it 'sets the type to SCM_RIGHTS when using :RIGHTS as the type argument' do
+        Socket::AncillaryData.new(:INET, :SOCKET, :RIGHTS, '').type.should == Socket::SCM_RIGHTS
+      end
+
+      it 'sets the type to SCM_TIMESTAMP when using :TIMESTAMP as the type argument' do
+        Socket::AncillaryData.new(:INET, :SOCKET, :TIMESTAMP, '').type.should == Socket::SCM_TIMESTAMP
+      end
+
+      it 'raises TypeError when using a numeric string as the type argument' do
+        lambda {
+          Socket::AncillaryData.new(:INET, :IGMP, Socket::SCM_RIGHTS.to_s, '')
+        }.should raise_error(TypeError)
+      end
+
+      it 'raises SocketError when using :RECVTTL as the type argument' do
+        lambda {
+          Socket::AncillaryData.new(:INET, :SOCKET, :RECVTTL, '')
+        }.should raise_error(SocketError)
+      end
+
+      it 'raises SocketError when using :MOO as the type argument' do
+        lambda {
+          Socket::AncillaryData.new(:INET, :SOCKET, :MOO, '')
+        }.should raise_error(SocketError)
+      end
+
+      it 'raises SocketError when using :IP_RECVTTL as the type argument' do
+        lambda {
+          Socket::AncillaryData.new(:INET, :SOCKET, :IP_RECVTTL, '')
+        }.should raise_error(SocketError)
+      end
+    end
+
+    describe 'using :AF_INET as the family and :SOCKET as the level' do
+      it 'sets the type to SCM_RIGHTS when using :RIGHTS as the type argument' do
+        Socket::AncillaryData.new(:INET, :SOCKET, :RIGHTS, '').type.should == Socket::SCM_RIGHTS
+      end
+    end
+
+    describe 'using :AF_INET as the family and :IP as the level' do
+      it 'sets the type to IP_RECVTTL when using :RECVTTL as the type argument' do
+        Socket::AncillaryData.new(:INET, :IP, :RECVTTL, '').type.should == Socket::IP_RECVTTL
+      end
+
+      with_feature :ip_mtu do
+        it 'sets the type to IP_MTU when using :MTU as the type argument' do
+          Socket::AncillaryData.new(:INET, :IP, :MTU, '').type.should == Socket::IP_MTU
+        end
+      end
+
+      it 'raises SocketError when using :RIGHTS as the type argument' do
+        lambda {
+          Socket::AncillaryData.new(:INET, :IP, :RIGHTS, '')
+        }.should raise_error(SocketError)
+      end
+
+      it 'raises SocketError when using :MOO as the type argument' do
+        lambda {
+          Socket::AncillaryData.new(:INET, :IP, :MOO, '')
+        }.should raise_error(SocketError)
+      end
+    end
+
+    describe 'using :AF_INET as the family and :IPV6 as the level' do
+      it 'sets the type to IPV6_CHECKSUM when using :CHECKSUM as the type argument' do
+        Socket::AncillaryData.new(:INET, :IPV6, :CHECKSUM, '').type.should == Socket::IPV6_CHECKSUM
+      end
+
+      with_feature :ipv6_nexthop do
+        it 'sets the type to IPV6_NEXTHOP when using :NEXTHOP as the type argument' do
+          Socket::AncillaryData.new(:INET, :IPV6, :NEXTHOP, '').type.should == Socket::IPV6_NEXTHOP
+        end
+      end
+
+      it 'raises SocketError when using :RIGHTS as the type argument' do
+        lambda {
+          Socket::AncillaryData.new(:INET, :IPV6, :RIGHTS, '')
+        }.should raise_error(SocketError)
+      end
+
+      it 'raises SocketError when using :MOO as the type argument' do
+        lambda {
+          Socket::AncillaryData.new(:INET, :IPV6, :MOO, '')
+        }.should raise_error(SocketError)
+      end
+    end
+
+    describe 'using :AF_INET as the family and :TCP as the level' do
+      with_feature :tcp_cork do
+        it 'sets the type to TCP_CORK when using :CORK as the type argument' do
+          Socket::AncillaryData.new(:INET, :TCP, :CORK, '').type.should == Socket::TCP_CORK
+        end
+      end
+
+      with_feature :tcp_info do
+        it 'sets the type to TCP_INFO when using :INFO as the type argument' do
+          Socket::AncillaryData.new(:INET, :TCP, :INFO, '').type.should == Socket::TCP_INFO
+        end
+      end
+
+      it 'raises SocketError when using :RIGHTS as the type argument' do
+        lambda {
+          Socket::AncillaryData.new(:INET, :TCP, :RIGHTS, '')
+        }.should raise_error(SocketError)
+      end
+
+      it 'raises SocketError when using :MOO as the type argument' do
+        lambda {
+          Socket::AncillaryData.new(:INET, :TCP, :MOO, '')
+        }.should raise_error(SocketError)
+      end
+    end
+
+    describe 'using :AF_INET as the family and :UDP as the level' do
+      with_feature :udp_cork do
+        it 'sets the type to UDP_CORK when using :CORK as the type argument' do
+          Socket::AncillaryData.new(:INET, :UDP, :CORK, '').type.should == Socket::UDP_CORK
+        end
+      end
+
+      it 'raises SocketError when using :RIGHTS as the type argument' do
+        lambda {
+          Socket::AncillaryData.new(:INET, :UDP, :RIGHTS, '')
+        }.should raise_error(SocketError)
+      end
+
+      it 'raises SocketError when using :MOO as the type argument' do
+        lambda {
+          Socket::AncillaryData.new(:INET, :UDP, :MOO, '')
+        }.should raise_error(SocketError)
+      end
+    end
+
+    describe 'using :AF_UNIX as the family and :SOCKET as the level' do
+      it 'sets the type to SCM_RIGHTS when using :RIGHTS as the type argument' do
+        Socket::AncillaryData.new(:UNIX, :SOCKET, :RIGHTS, '').type.should == Socket::SCM_RIGHTS
+      end
+
+      it 'raises SocketError when using :CORK sa the type argument' do
+        lambda {
+          Socket::AncillaryData.new(:UNIX, :SOCKET, :CORK, '')
+        }.should raise_error(SocketError)
+      end
+    end
+
+    describe 'using :AF_UNIX as the family and :IP as the level' do
+      it 'raises SocketError' do
+        lambda {
+          Socket::AncillaryData.new(:UNIX, :IP, :RECVTTL, '')
+        }.should raise_error(SocketError)
+      end
+    end
+
+    describe 'using :AF_UNIX as the family and :IPV6 as the level' do
+      it 'raises SocketError' do
+        lambda {
+          Socket::AncillaryData.new(:UNIX, :IPV6, :NEXTHOP, '')
+        }.should raise_error(SocketError)
+      end
+    end
+
+    describe 'using :AF_UNIX as the family and :TCP as the level' do
+      it 'raises SocketError' do
+        lambda {
+          Socket::AncillaryData.new(:UNIX, :TCP, :CORK, '')
+        }.should raise_error(SocketError)
+      end
+    end
+
+    describe 'using :AF_UNIX as the family and :UDP as the level' do
+      it 'raises SocketError' do
+        lambda {
+          Socket::AncillaryData.new(:UNIX, :UDP, :CORK, '')
+        }.should raise_error(SocketError)
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/ancillarydata/int_spec.rb b/spec/ruby/library/socket/ancillarydata/int_spec.rb
new file mode 100644
index 0000000000..75608a28b8
--- /dev/null
+++ b/spec/ruby/library/socket/ancillarydata/int_spec.rb
@@ -0,0 +1,43 @@
+require_relative '../spec_helper'
+
+with_feature :ancillary_data do
+  describe 'Socket::AncillaryData.int' do
+    before do
+      @data = Socket::AncillaryData.int(:INET, :SOCKET, :RIGHTS, 4)
+    end
+
+    it 'returns a Socket::AncillaryData' do
+      @data.should be_an_instance_of(Socket::AncillaryData)
+    end
+
+    it 'sets the family to AF_INET' do
+      @data.family.should == Socket::AF_INET
+    end
+
+    it 'sets the level SOL_SOCKET' do
+      @data.level.should == Socket::SOL_SOCKET
+    end
+
+    it 'sets the type SCM_RIGHTS' do
+      @data.type.should == Socket::SCM_RIGHTS
+    end
+
+    it 'sets the data to a packed String' do
+      @data.data.should == [4].pack('I')
+    end
+  end
+
+  describe 'Socket::AncillaryData#int' do
+    it 'returns the data as a Fixnum' do
+      data = Socket::AncillaryData.int(:UNIX, :SOCKET, :RIGHTS, 4)
+
+      data.int.should == 4
+    end
+
+    it 'raises when the data is not a Fixnum' do
+      data = Socket::AncillaryData.new(:UNIX, :SOCKET, :RIGHTS, 'ugh')
+
+      lambda { data.int }.should raise_error(TypeError)
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/ancillarydata/ip_pktinfo_spec.rb b/spec/ruby/library/socket/ancillarydata/ip_pktinfo_spec.rb
new file mode 100644
index 0000000000..aaf5b80a23
--- /dev/null
+++ b/spec/ruby/library/socket/ancillarydata/ip_pktinfo_spec.rb
@@ -0,0 +1,145 @@
+require_relative '../spec_helper'
+
+with_feature :ancillary_data do
+  describe 'Socket::AncillaryData.ip_pktinfo' do
+    describe 'with a source address and index' do
+      before do
+        @data = Socket::AncillaryData.ip_pktinfo(Addrinfo.ip('127.0.0.1'), 4)
+      end
+
+      it 'returns a Socket::AncillaryData' do
+        @data.should be_an_instance_of(Socket::AncillaryData)
+      end
+
+      it 'sets the family to AF_INET' do
+        @data.family.should == Socket::AF_INET
+      end
+
+      it 'sets the level to IPPROTO_IP' do
+        @data.level.should == Socket::IPPROTO_IP
+      end
+
+      it 'sets the type to IP_PKTINFO' do
+        @data.type.should == Socket::IP_PKTINFO
+      end
+    end
+
+    describe 'with a source address, index, and destination address' do
+      before do
+        source = Addrinfo.ip('127.0.0.1')
+        dest   = Addrinfo.ip('127.0.0.5')
+        @data  = Socket::AncillaryData.ip_pktinfo(source, 4, dest)
+      end
+
+      it 'returns a Socket::AncillaryData' do
+        @data.should be_an_instance_of(Socket::AncillaryData)
+      end
+
+      it 'sets the family to AF_INET' do
+        @data.family.should == Socket::AF_INET
+      end
+
+      it 'sets the level to IPPROTO_IP' do
+        @data.level.should == Socket::IPPROTO_IP
+      end
+
+      it 'sets the type to IP_PKTINFO' do
+        @data.type.should == Socket::IP_PKTINFO
+      end
+    end
+  end
+
+  describe 'Socket::AncillaryData#ip_pktinfo' do
+    describe 'using an Addrinfo without a port number' do
+      before do
+        @source = Addrinfo.ip('127.0.0.1')
+        @dest   = Addrinfo.ip('127.0.0.5')
+        @data   = Socket::AncillaryData.ip_pktinfo(@source, 4, @dest)
+      end
+
+      it 'returns an Array' do
+        @data.ip_pktinfo.should be_an_instance_of(Array)
+      end
+
+      describe 'the returned Array' do
+        before do
+          @info = @data.ip_pktinfo
+        end
+
+        it 'stores an Addrinfo at index 0' do
+          @info[0].should be_an_instance_of(Addrinfo)
+        end
+
+        it 'stores the ifindex at index 1' do
+          @info[1].should be_an_instance_of(Fixnum)
+        end
+
+        it 'stores an Addrinfo at index 2' do
+          @info[2].should be_an_instance_of(Addrinfo)
+        end
+      end
+
+      describe 'the source Addrinfo' do
+        before do
+          @addr = @data.ip_pktinfo[0]
+        end
+
+        it 'uses the correct IP address' do
+          @addr.ip_address.should == '127.0.0.1'
+        end
+
+        it 'is not the same object as the input Addrinfo' do
+          @addr.should_not == @source
+        end
+      end
+
+      describe 'the ifindex' do
+        it 'is a Fixnum' do
+          @data.ip_pktinfo[1].should == 4
+        end
+      end
+
+      describe 'the destination Addrinfo' do
+        before do
+          @addr = @data.ip_pktinfo[2]
+        end
+
+        it 'uses the correct IP address' do
+          @addr.ip_address.should == '127.0.0.5'
+        end
+
+        it 'is not the same object as the input Addrinfo' do
+          @addr.should_not == @dest
+        end
+      end
+    end
+
+    describe 'using an Addrinfo with a port number' do
+      before do
+        @source = Addrinfo.tcp('127.0.0.1', 80)
+        @dest   = Addrinfo.tcp('127.0.0.5', 85)
+        @data   = Socket::AncillaryData.ip_pktinfo(@source, 4, @dest)
+      end
+
+      describe 'the source Addrinfo' do
+        before do
+          @addr = @data.ip_pktinfo[0]
+        end
+
+        it 'does not contain a port number' do
+          @addr.ip_port.should == 0
+        end
+      end
+
+      describe 'the destination Addrinfo' do
+        before do
+          @addr = @data.ip_pktinfo[2]
+        end
+
+        it 'does not contain a port number' do
+          @addr.ip_port.should == 0
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/ancillarydata/ipv6_pktinfo_addr_spec.rb b/spec/ruby/library/socket/ancillarydata/ipv6_pktinfo_addr_spec.rb
new file mode 100644
index 0000000000..f70fe27d6a
--- /dev/null
+++ b/spec/ruby/library/socket/ancillarydata/ipv6_pktinfo_addr_spec.rb
@@ -0,0 +1,11 @@
+require_relative '../spec_helper'
+
+with_feature :ancillary_data, :ipv6_pktinfo do
+  describe 'Socket::AncillaryData#ipv6_pktinfo_addr' do
+    it 'returns an Addrinfo' do
+      data = Socket::AncillaryData.ipv6_pktinfo(Addrinfo.ip('::1'), 4)
+
+      data.ipv6_pktinfo_addr.should be_an_instance_of(Addrinfo)
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/ancillarydata/ipv6_pktinfo_ifindex_spec.rb b/spec/ruby/library/socket/ancillarydata/ipv6_pktinfo_ifindex_spec.rb
new file mode 100644
index 0000000000..bda37eec98
--- /dev/null
+++ b/spec/ruby/library/socket/ancillarydata/ipv6_pktinfo_ifindex_spec.rb
@@ -0,0 +1,11 @@
+require_relative '../spec_helper'
+
+with_feature :ancillary_data, :ipv6_pktinfo do
+  describe 'Socket::AncillaryData#ipv6_pktinfo_ifindex' do
+    it 'returns an Addrinfo' do
+      data = Socket::AncillaryData.ipv6_pktinfo(Addrinfo.ip('::1'), 4)
+
+      data.ipv6_pktinfo_ifindex.should == 4
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/ancillarydata/ipv6_pktinfo_spec.rb b/spec/ruby/library/socket/ancillarydata/ipv6_pktinfo_spec.rb
new file mode 100644
index 0000000000..6315aba89c
--- /dev/null
+++ b/spec/ruby/library/socket/ancillarydata/ipv6_pktinfo_spec.rb
@@ -0,0 +1,89 @@
+require_relative '../spec_helper'
+
+with_feature :ancillary_data, :ipv6_pktinfo do
+  describe 'Socket::AncillaryData.ipv6_pktinfo' do
+    before do
+      @data = Socket::AncillaryData.ipv6_pktinfo(Addrinfo.ip('::1'), 4)
+    end
+
+    it 'returns a Socket::AncillaryData' do
+      @data.should be_an_instance_of(Socket::AncillaryData)
+    end
+
+    it 'sets the family to AF_INET' do
+      @data.family.should == Socket::AF_INET6
+    end
+
+    it 'sets the level to IPPROTO_IP' do
+      @data.level.should == Socket::IPPROTO_IPV6
+    end
+
+    it 'sets the type to IP_PKTINFO' do
+      @data.type.should == Socket::IPV6_PKTINFO
+    end
+  end
+
+  describe 'Socket::AncillaryData#ipv6_pktinfo' do
+    describe 'using an Addrinfo without a port number' do
+      before do
+        @source = Addrinfo.ip('::1')
+        @data   = Socket::AncillaryData.ipv6_pktinfo(@source, 4)
+      end
+
+      it 'returns an Array' do
+        @data.ipv6_pktinfo.should be_an_instance_of(Array)
+      end
+
+      describe 'the returned Array' do
+        before do
+          @info = @data.ipv6_pktinfo
+        end
+
+        it 'stores an Addrinfo at index 0' do
+          @info[0].should be_an_instance_of(Addrinfo)
+        end
+
+        it 'stores the ifindex at index 1' do
+          @info[1].should be_an_instance_of(Fixnum)
+        end
+      end
+
+      describe 'the source Addrinfo' do
+        before do
+          @addr = @data.ipv6_pktinfo[0]
+        end
+
+        it 'uses the correct IP address' do
+          @addr.ip_address.should == '::1'
+        end
+
+        it 'is not the same object as the input Addrinfo' do
+          @addr.should_not == @source
+        end
+      end
+
+      describe 'the ifindex' do
+        it 'is a Fixnum' do
+          @data.ipv6_pktinfo[1].should == 4
+        end
+      end
+    end
+
+    describe 'using an Addrinfo with a port number' do
+      before do
+        @source = Addrinfo.tcp('::1', 80)
+        @data   = Socket::AncillaryData.ipv6_pktinfo(@source, 4)
+      end
+
+      describe 'the source Addrinfo' do
+        before do
+          @addr = @data.ipv6_pktinfo[0]
+        end
+
+        it 'does not contain a port number' do
+          @addr.ip_port.should == 0
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/ancillarydata/level_spec.rb b/spec/ruby/library/socket/ancillarydata/level_spec.rb
new file mode 100644
index 0000000000..40b070a6d8
--- /dev/null
+++ b/spec/ruby/library/socket/ancillarydata/level_spec.rb
@@ -0,0 +1,9 @@
+require_relative '../spec_helper'
+
+with_feature :ancillary_data do
+  describe 'Socket::AncillaryData#level' do
+    it 'returns the level as a Fixnum' do
+      Socket::AncillaryData.new(:INET, :SOCKET, :RIGHTS, '').level.should == Socket::SOL_SOCKET
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/ancillarydata/type_spec.rb b/spec/ruby/library/socket/ancillarydata/type_spec.rb
new file mode 100644
index 0000000000..1a4b04ed57
--- /dev/null
+++ b/spec/ruby/library/socket/ancillarydata/type_spec.rb
@@ -0,0 +1,9 @@
+require_relative '../spec_helper'
+
+with_feature :ancillary_data do
+  describe 'Socket::AncillaryData#type' do
+    it 'returns the type as a Fixnum' do
+      Socket::AncillaryData.new(:INET, :SOCKET, :RIGHTS, '').type.should == Socket::SCM_RIGHTS
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/ancillarydata/unix_rights_spec.rb b/spec/ruby/library/socket/ancillarydata/unix_rights_spec.rb
new file mode 100644
index 0000000000..0bbef4c08d
--- /dev/null
+++ b/spec/ruby/library/socket/ancillarydata/unix_rights_spec.rb
@@ -0,0 +1,59 @@
+require_relative '../spec_helper'
+
+with_feature :ancillary_data do
+  describe 'Socket::AncillaryData.unix_rights' do
+    describe 'using a list of IO objects' do
+      before do
+        @data = Socket::AncillaryData.unix_rights(STDOUT, STDERR)
+      end
+
+      it 'sets the family to AF_UNIX' do
+        @data.family.should == Socket::AF_UNIX
+      end
+
+      it 'sets the level to SOL_SOCKET' do
+        @data.level.should == Socket::SOL_SOCKET
+      end
+
+      it 'sets the type to SCM_RIGHTS' do
+        @data.type.should == Socket::SCM_RIGHTS
+      end
+
+      it 'sets the data to a String containing the file descriptors' do
+        @data.data.unpack('I*').should == [STDOUT.fileno, STDERR.fileno]
+      end
+    end
+
+    describe 'using non IO objects' do
+      it 'raises TypeError' do
+        lambda { Socket::AncillaryData.unix_rights(10) }.should raise_error(TypeError)
+      end
+    end
+  end
+
+  describe 'Socket::AncillaryData#unix_rights' do
+    it 'returns the data as an Array of IO objects' do
+      data = Socket::AncillaryData.unix_rights(STDOUT, STDERR)
+
+      data.unix_rights.should == [STDOUT, STDERR]
+    end
+
+    it 'returns nil when the data is not a list of file descriptors' do
+      data = Socket::AncillaryData.new(:UNIX, :SOCKET, :RIGHTS, '')
+
+      data.unix_rights.should be_nil
+    end
+
+    it 'raises TypeError when the level is not SOL_SOCKET' do
+      data = Socket::AncillaryData.new(:INET, :IP, :RECVTTL, '')
+
+      lambda { data.unix_rights }.should raise_error(TypeError)
+    end
+
+    it 'raises TypeError when the type is not SCM_RIGHTS' do
+      data = Socket::AncillaryData.new(:INET, :SOCKET, :TIMESTAMP, '')
+
+      lambda { data.unix_rights }.should raise_error(TypeError)
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/basicsocket/close_read_spec.rb b/spec/ruby/library/socket/basicsocket/close_read_spec.rb
index 13894bc0c5..c989fcaf72 100644
--- a/spec/ruby/library/socket/basicsocket/close_read_spec.rb
+++ b/spec/ruby/library/socket/basicsocket/close_read_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "Socket::BasicSocket#close_read" do
@@ -15,13 +15,13 @@ describe "Socket::BasicSocket#close_read" do
     lambda { @server.read }.should raise_error(IOError)
   end
 
-  it "it works on sockets with closed ends" do
+  it 'does not raise when called on a socket already closed for reading' do
+    @server.close_read
     @server.close_read
-    lambda { @server.close_read }.should_not raise_error(Exception)
     lambda { @server.read }.should raise_error(IOError)
   end
 
-  it "does not close the socket" do
+  it 'does not fully close the socket' do
     @server.close_read
     @server.closed?.should be_false
   end
@@ -32,7 +32,7 @@ describe "Socket::BasicSocket#close_read" do
     @server.closed?.should be_true
   end
 
-  it "raises IOError on closed socket" do
+  it 'raises IOError when called on a fully closed socket' do
     @server.close
     lambda { @server.close_read }.should raise_error(IOError)
   end
diff --git a/spec/ruby/library/socket/basicsocket/close_write_spec.rb b/spec/ruby/library/socket/basicsocket/close_write_spec.rb
index 194df1d535..f37e0e5074 100644
--- a/spec/ruby/library/socket/basicsocket/close_write_spec.rb
+++ b/spec/ruby/library/socket/basicsocket/close_write_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "Socket::BasicSocket#close_write" do
@@ -15,13 +15,13 @@ describe "Socket::BasicSocket#close_write" do
     lambda { @server.write("foo") }.should raise_error(IOError)
   end
 
-  it "works on sockets with closed write ends" do
+  it 'does not raise when called on a socket already closed for writing' do
+    @server.close_write
     @server.close_write
-    lambda { @server.close_write }.should_not raise_error(Exception)
     lambda { @server.write("foo") }.should raise_error(IOError)
   end
 
-  it "does not close the socket" do
+  it 'does not fully close the socket' do
     @server.close_write
     @server.closed?.should be_false
   end
@@ -37,7 +37,7 @@ describe "Socket::BasicSocket#close_write" do
     @server.closed?.should be_true
   end
 
-  it "raises IOError on closed socket" do
+  it 'raises IOError when called on a fully closed socket' do
     @server.close
     lambda { @server.close_write }.should raise_error(IOError)
   end
diff --git a/spec/ruby/library/socket/basicsocket/connect_address_spec.rb b/spec/ruby/library/socket/basicsocket/connect_address_spec.rb
new file mode 100644
index 0000000000..cb05d3bfe1
--- /dev/null
+++ b/spec/ruby/library/socket/basicsocket/connect_address_spec.rb
@@ -0,0 +1,150 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+describe 'Socket#connect_address' do
+  describe 'using an unbound socket' do
+    after do
+      @sock.close
+    end
+
+    it 'raises SocketError' do
+      @sock = Socket.new(:INET, :STREAM)
+
+      lambda { @sock.connect_address }.should raise_error(SocketError)
+    end
+  end
+
+  describe 'using a socket bound to 0.0.0.0' do
+    before do
+      @sock = Socket.new(:INET, :STREAM)
+      @sock.bind(Socket.sockaddr_in(0, '0.0.0.0'))
+    end
+
+    after do
+      @sock.close
+    end
+
+    it 'returns an Addrinfo' do
+      @sock.connect_address.should be_an_instance_of(Addrinfo)
+    end
+
+    it 'uses 127.0.0.1 as the IP address' do
+      @sock.connect_address.ip_address.should == '127.0.0.1'
+    end
+
+    it 'uses the correct port number' do
+      @sock.connect_address.ip_port.should > 0
+    end
+
+    it 'uses AF_INET as the address family' do
+      @sock.connect_address.afamily.should == Socket::AF_INET
+    end
+
+    it 'uses PF_INET as the address family' do
+      @sock.connect_address.pfamily.should == Socket::PF_INET
+    end
+
+    it 'uses SOCK_STREAM as the socket type' do
+      @sock.connect_address.socktype.should == Socket::SOCK_STREAM
+    end
+
+    it 'uses 0 as the protocol' do
+      @sock.connect_address.protocol.should == 0
+    end
+  end
+
+  describe 'using a socket bound to ::' do
+    before do
+      @sock = Socket.new(:INET6, :STREAM)
+      @sock.bind(Socket.sockaddr_in(0, '::'))
+    end
+
+    after do
+      @sock.close
+    end
+
+    it 'returns an Addrinfo' do
+      @sock.connect_address.should be_an_instance_of(Addrinfo)
+    end
+
+    it 'uses ::1 as the IP address' do
+      @sock.connect_address.ip_address.should == '::1'
+    end
+
+    it 'uses the correct port number' do
+      @sock.connect_address.ip_port.should > 0
+    end
+
+    it 'uses AF_INET6 as the address family' do
+      @sock.connect_address.afamily.should == Socket::AF_INET6
+    end
+
+    it 'uses PF_INET6 as the address family' do
+      @sock.connect_address.pfamily.should == Socket::PF_INET6
+    end
+
+    it 'uses SOCK_STREAM as the socket type' do
+      @sock.connect_address.socktype.should == Socket::SOCK_STREAM
+    end
+
+    it 'uses 0 as the protocol' do
+      @sock.connect_address.protocol.should == 0
+    end
+  end
+
+  with_feature :unix_socket do
+    describe 'using an unbound UNIX socket' do
+      before do
+        @path = SocketSpecs.socket_path
+        @server = UNIXServer.new(@path)
+        @client = UNIXSocket.new(@path)
+      end
+
+      after do
+        @client.close
+        @server.close
+        rm_r(@path)
+      end
+
+      it 'raises SocketError' do
+        lambda { @client.connect_address }.should raise_error(SocketError)
+      end
+    end
+
+    describe 'using a bound UNIX socket' do
+      before do
+        @path = SocketSpecs.socket_path
+        @sock = UNIXServer.new(@path)
+      end
+
+      after do
+        @sock.close
+        rm_r(@path)
+      end
+
+      it 'returns an Addrinfo' do
+        @sock.connect_address.should be_an_instance_of(Addrinfo)
+      end
+
+      it 'uses the correct socket path' do
+        @sock.connect_address.unix_path.should == @path
+      end
+
+      it 'uses AF_UNIX as the address family' do
+        @sock.connect_address.afamily.should == Socket::AF_UNIX
+      end
+
+      it 'uses PF_UNIX as the protocol family' do
+        @sock.connect_address.pfamily.should == Socket::PF_UNIX
+      end
+
+      it 'uses SOCK_STREAM as the socket type' do
+        @sock.connect_address.socktype.should == Socket::SOCK_STREAM
+      end
+
+      it 'uses 0 as the protocol' do
+        @sock.connect_address.protocol.should == 0
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/basicsocket/do_not_reverse_lookup_spec.rb b/spec/ruby/library/socket/basicsocket/do_not_reverse_lookup_spec.rb
index 479a1fdac8..85a66275f8 100644
--- a/spec/ruby/library/socket/basicsocket/do_not_reverse_lookup_spec.rb
+++ b/spec/ruby/library/socket/basicsocket/do_not_reverse_lookup_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "BasicSocket.do_not_reverse_lookup" do
diff --git a/spec/ruby/library/socket/basicsocket/for_fd_spec.rb b/spec/ruby/library/socket/basicsocket/for_fd_spec.rb
index affe8c2428..9c9e6a8b55 100644
--- a/spec/ruby/library/socket/basicsocket/for_fd_spec.rb
+++ b/spec/ruby/library/socket/basicsocket/for_fd_spec.rb
@@ -1,14 +1,14 @@
-
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
-describe "BasicSocket#for_fd" do
+describe "BasicSocket.for_fd" do
   before :each do
     @server = TCPServer.new(0)
     @s2 = nil
   end
 
   after :each do
+    @socket1.close if @socket1
     @server.close if @server
   end
 
@@ -18,4 +18,21 @@ describe "BasicSocket#for_fd" do
     @s2.should be_kind_of(TCPServer)
     @s2.fileno.should == @server.fileno
   end
+
+  it 'returns a new socket for a file descriptor' do
+    @socket1 = Socket.new(:INET, :DGRAM)
+    socket2 = Socket.for_fd(@socket1.fileno)
+    socket2.autoclose = false
+
+    socket2.should be_an_instance_of(Socket)
+    socket2.fileno.should == @socket1.fileno
+  end
+
+  it 'sets the socket into binary mode' do
+    @socket1 = Socket.new(:INET, :DGRAM)
+    socket2 = Socket.for_fd(@socket1.fileno)
+    socket2.autoclose = false
+
+    socket2.binmode?.should be_true
+  end
 end
diff --git a/spec/ruby/library/socket/basicsocket/getpeereid_spec.rb b/spec/ruby/library/socket/basicsocket/getpeereid_spec.rb
new file mode 100644
index 0000000000..9eeb6d0e0b
--- /dev/null
+++ b/spec/ruby/library/socket/basicsocket/getpeereid_spec.rb
@@ -0,0 +1,36 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+describe 'BasicSocket#getpeereid' do
+  with_feature :unix_socket do
+    describe 'using a UNIXSocket' do
+      before do
+        @path = SocketSpecs.socket_path
+        @server = UNIXServer.new(@path)
+        @client = UNIXSocket.new(@path)
+      end
+
+      after do
+        @client.close
+        @server.close
+
+        rm_r(@path)
+      end
+
+      it 'returns an Array with the user and group ID' do
+        @client.getpeereid.should == [Process.euid, Process.egid]
+      end
+    end
+  end
+
+  describe 'using an IPSocket' do
+    after do
+      @sock.close
+    end
+
+    it 'raises NoMethodError' do
+      @sock = TCPServer.new('127.0.0.1', 0)
+      lambda { @sock.getpeereid }.should raise_error(NoMethodError)
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/basicsocket/getpeername_spec.rb b/spec/ruby/library/socket/basicsocket/getpeername_spec.rb
index c2636f764e..23c73056cd 100644
--- a/spec/ruby/library/socket/basicsocket/getpeername_spec.rb
+++ b/spec/ruby/library/socket/basicsocket/getpeername_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "Socket::BasicSocket#getpeername" do
@@ -19,8 +19,7 @@ describe "Socket::BasicSocket#getpeername" do
     @client.getpeername.should == server_sockaddr
   end
 
-  # Catch general exceptions to prevent NotImplementedError
-  it "raises an error if socket's not connected" do
-    lambda { @server.getpeername }.should raise_error(Exception)
+  it 'raises Errno::ENOTCONN for a disconnected socket' do
+    lambda { @server.getpeername }.should raise_error(Errno::ENOTCONN)
   end
 end
diff --git a/spec/ruby/library/socket/basicsocket/getsockname_spec.rb b/spec/ruby/library/socket/basicsocket/getsockname_spec.rb
index 581eb68599..a2c5980a9e 100644
--- a/spec/ruby/library/socket/basicsocket/getsockname_spec.rb
+++ b/spec/ruby/library/socket/basicsocket/getsockname_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "Socket::BasicSocket#getsockname" do
@@ -20,7 +20,7 @@ describe "Socket::BasicSocket#getsockname" do
     sockaddr[0].should == @socket.addr[1]
   end
 
-  it "returns empty sockaddr for unbinded sockets" do
+  it 'returns a default socket address for a disconnected socket' do
     @socket = Socket.new(Socket::AF_INET, Socket::SOCK_STREAM, 0)
     sockaddr = Socket.unpack_sockaddr_in(@socket.getsockname)
     sockaddr.should == [0, "0.0.0.0"]
diff --git a/spec/ruby/library/socket/basicsocket/getsockopt_spec.rb b/spec/ruby/library/socket/basicsocket/getsockopt_spec.rb
index 7040aac5e9..926d7505e8 100644
--- a/spec/ruby/library/socket/basicsocket/getsockopt_spec.rb
+++ b/spec/ruby/library/socket/basicsocket/getsockopt_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "BasicSocket#getsockopt" do
@@ -43,4 +43,146 @@ describe "BasicSocket#getsockopt" do
   it "raises a SystemCallError with an invalid socket option" do
     lambda { @sock.getsockopt Socket::SOL_SOCKET, -1 }.should raise_error(Errno::ENOPROTOOPT)
   end
+
+  it 'returns a Socket::Option using a constant' do
+    opt = @sock.getsockopt(Socket::SOL_SOCKET, Socket::SO_TYPE)
+
+    opt.should be_an_instance_of(Socket::Option)
+  end
+
+  it 'returns a Socket::Option for a boolean option' do
+    opt = @sock.getsockopt(Socket::SOL_SOCKET, Socket::SO_REUSEADDR)
+
+    opt.bool.should == false
+  end
+
+  it 'returns a Socket::Option for a numeric option' do
+    opt = @sock.getsockopt(Socket::IPPROTO_IP, Socket::IP_TTL)
+
+    opt.int.should be_an_instance_of(Fixnum)
+  end
+
+  it 'returns a Socket::Option for a struct option' do
+    opt = @sock.getsockopt(Socket::SOL_SOCKET, Socket::SO_LINGER)
+
+    opt.linger.should == [false, 0]
+  end
+
+  it 'raises Errno::ENOPROTOOPT when requesting an invalid option' do
+    lambda { @sock.getsockopt(Socket::SOL_SOCKET, -1) }.should raise_error(Errno::ENOPROTOOPT)
+  end
+
+  describe 'using Symbols as arguments' do
+    it 'returns a Socket::Option for arguments :SOCKET and :TYPE' do
+      opt = @sock.getsockopt(:SOCKET, :TYPE)
+
+      opt.level.should   == Socket::SOL_SOCKET
+      opt.optname.should == Socket::SO_TYPE
+    end
+
+    it 'returns a Socket::Option for arguments :IP and :TTL' do
+      opt = @sock.getsockopt(:IP, :TTL)
+
+      opt.level.should   == Socket::IPPROTO_IP
+      opt.optname.should == Socket::IP_TTL
+    end
+
+    it 'returns a Socket::Option for arguments :SOCKET and :REUSEADDR' do
+      opt = @sock.getsockopt(:SOCKET, :REUSEADDR)
+
+      opt.level.should   == Socket::SOL_SOCKET
+      opt.optname.should == Socket::SO_REUSEADDR
+    end
+
+    it 'returns a Socket::Option for arguments :SOCKET and :LINGER' do
+      opt = @sock.getsockopt(:SOCKET, :LINGER)
+
+      opt.level.should   == Socket::SOL_SOCKET
+      opt.optname.should == Socket::SO_LINGER
+    end
+
+    with_feature :udp_cork do
+      it 'returns a Socket::Option for arguments :UDP and :CORK' do
+        sock = Socket.new(:INET, :DGRAM)
+        begin
+          opt  = sock.getsockopt(:UDP, :CORK)
+
+          opt.level.should   == Socket::IPPROTO_UDP
+          opt.optname.should == Socket::UDP_CORK
+        ensure
+          sock.close
+        end
+      end
+    end
+  end
+
+  describe 'using Strings as arguments' do
+    it 'returns a Socket::Option for arguments "SOCKET" and "TYPE"' do
+      opt = @sock.getsockopt("SOCKET", "TYPE")
+
+      opt.level.should   == Socket::SOL_SOCKET
+      opt.optname.should == Socket::SO_TYPE
+    end
+
+    it 'returns a Socket::Option for arguments "IP" and "TTL"' do
+      opt = @sock.getsockopt("IP", "TTL")
+
+      opt.level.should   == Socket::IPPROTO_IP
+      opt.optname.should == Socket::IP_TTL
+    end
+
+    it 'returns a Socket::Option for arguments "SOCKET" and "REUSEADDR"' do
+      opt = @sock.getsockopt("SOCKET", "REUSEADDR")
+
+      opt.level.should   == Socket::SOL_SOCKET
+      opt.optname.should == Socket::SO_REUSEADDR
+    end
+
+    it 'returns a Socket::Option for arguments "SOCKET" and "LINGER"' do
+      opt = @sock.getsockopt("SOCKET", "LINGER")
+
+      opt.level.should   == Socket::SOL_SOCKET
+      opt.optname.should == Socket::SO_LINGER
+    end
+
+    with_feature :udp_cork do
+      it 'returns a Socket::Option for arguments "UDP" and "CORK"' do
+        sock = Socket.new("INET", "DGRAM")
+        begin
+          opt  = sock.getsockopt("UDP", "CORK")
+
+          opt.level.should   == Socket::IPPROTO_UDP
+          opt.optname.should == Socket::UDP_CORK
+        ensure
+          sock.close
+        end
+      end
+    end
+  end
+
+  describe 'using a String based option' do
+    it 'allows unpacking of a boolean option' do
+      opt = @sock.getsockopt(Socket::SOL_SOCKET, Socket::SO_REUSEADDR).to_s
+
+      opt.unpack('i').should == [0]
+    end
+
+    it 'allows unpacking of a numeric option' do
+      opt   = @sock.getsockopt(Socket::IPPROTO_IP, Socket::IP_TTL).to_s
+      array = opt.unpack('i')
+
+      array[0].should be_an_instance_of(Fixnum)
+      array[0].should > 0
+    end
+
+    it 'allows unpacking of a struct option' do
+      opt = @sock.getsockopt(Socket::SOL_SOCKET, Socket::SO_LINGER).to_s
+
+      if opt.bytesize == 8
+        opt.unpack('ii').should == [0, 0]
+      else
+        opt.unpack('i').should == [0]
+      end
+    end
+  end
 end
diff --git a/spec/ruby/library/socket/basicsocket/ioctl_spec.rb b/spec/ruby/library/socket/basicsocket/ioctl_spec.rb
index 6ce314b6fb..615d92bea8 100644
--- a/spec/ruby/library/socket/basicsocket/ioctl_spec.rb
+++ b/spec/ruby/library/socket/basicsocket/ioctl_spec.rb
@@ -1,5 +1,4 @@
-require_relative '../../../spec_helper'
-require 'socket'
+require_relative '../spec_helper'
 
 describe "Socket::BasicSocket#ioctl" do
   platform_is :linux do
diff --git a/spec/ruby/library/socket/basicsocket/recv_nonblock_spec.rb b/spec/ruby/library/socket/basicsocket/recv_nonblock_spec.rb
index 8fc0dce4f0..1b6027d26c 100644
--- a/spec/ruby/library/socket/basicsocket/recv_nonblock_spec.rb
+++ b/spec/ruby/library/socket/basicsocket/recv_nonblock_spec.rb
@@ -1,7 +1,65 @@
-require_relative '../../../spec_helper'
-require_relative '../shared/recv_nonblock'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "Socket::BasicSocket#recv_nonblock" do
-  it_behaves_like :socket_recv_nonblock, :recv_nonblock
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before :each do
+      @s1 = Socket.new(family, :DGRAM)
+      @s2 = Socket.new(family, :DGRAM)
+    end
+
+    after :each do
+      @s1.close unless @s1.closed?
+      @s2.close unless @s2.closed?
+    end
+
+    platform_is_not :windows do
+      describe 'using an unbound socket' do
+        it 'raises an exception extending IO::WaitReadable' do
+          lambda { @s1.recv_nonblock(1) }.should raise_error(IO::WaitReadable)
+        end
+      end
+    end
+
+    it "raises an exception extending IO::WaitReadable if there's no data available" do
+      @s1.bind(Socket.pack_sockaddr_in(0, ip_address))
+      lambda {
+        @s1.recv_nonblock(5)
+      }.should raise_error(IO::WaitReadable) { |e|
+        platform_is_not :windows do
+          e.should be_kind_of(Errno::EAGAIN)
+        end
+        platform_is :windows do
+          e.should be_kind_of(Errno::EWOULDBLOCK)
+        end
+      }
+    end
+
+    it "receives data after it's ready" do
+      @s1.bind(Socket.pack_sockaddr_in(0, ip_address))
+      @s2.send("aaa", 0, @s1.getsockname)
+      IO.select([@s1], nil, nil, 2)
+      @s1.recv_nonblock(5).should == "aaa"
+    end
+
+    it "allows an output buffer as third argument" do
+      @s1.bind(Socket.pack_sockaddr_in(0, ip_address))
+      @s2.send("data", 0, @s1.getsockname)
+      IO.select([@s1], nil, nil, 2)
+
+      buf = "foo"
+      @s1.recv_nonblock(5, 0, buf)
+      buf.should == "data"
+    end
+
+    it "does not block if there's no data available" do
+      @s1.bind(Socket.pack_sockaddr_in(0, ip_address))
+      @s2.send("a", 0, @s1.getsockname)
+      IO.select([@s1], nil, nil, 2)
+      @s1.recv_nonblock(1).should == "a"
+      lambda {
+        @s1.recv_nonblock(5)
+      }.should raise_error(IO::WaitReadable)
+    end
+  end
 end
diff --git a/spec/ruby/library/socket/basicsocket/recv_spec.rb b/spec/ruby/library/socket/basicsocket/recv_spec.rb
index 7677d4ff8c..a277dc2d97 100644
--- a/spec/ruby/library/socket/basicsocket/recv_spec.rb
+++ b/spec/ruby/library/socket/basicsocket/recv_spec.rb
@@ -1,5 +1,5 @@
 # -*- encoding: binary -*-
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "BasicSocket#recv" do
@@ -92,3 +92,68 @@ describe "BasicSocket#recv" do
     socket.close
   end
 end
+
+describe 'BasicSocket#recv' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before do
+      @server = Socket.new(family, :DGRAM)
+      @client = Socket.new(family, :DGRAM)
+    end
+
+    after do
+      @client.close
+      @server.close
+    end
+
+    describe 'using an unbound socket' do
+      it 'blocks the caller' do
+        lambda { @server.recv(4) }.should block_caller
+      end
+    end
+
+    describe 'using a bound socket' do
+      before do
+        @server.bind(Socket.sockaddr_in(0, ip_address))
+      end
+
+      describe 'without any data available' do
+        it 'blocks the caller' do
+          lambda { @server.recv(4) }.should block_caller
+        end
+      end
+
+      describe 'with data available' do
+        before do
+          @client.connect(@server.getsockname)
+        end
+
+        it 'reads the given amount of bytes' do
+          @client.write('hello')
+
+          @server.recv(2).should == 'he'
+        end
+
+        it 'reads the given amount of bytes when it exceeds the data size' do
+          @client.write('he')
+
+          @server.recv(6).should == 'he'
+        end
+
+        it 'blocks the caller when called twice without new data being available' do
+          @client.write('hello')
+
+          @server.recv(2).should == 'he'
+
+          lambda { @server.recv(4) }.should block_caller
+        end
+
+        it 'takes a peek at the data when using the MSG_PEEK flag' do
+          @client.write('hello')
+
+          @server.recv(2, Socket::MSG_PEEK).should == 'he'
+          @server.recv(2).should == 'he'
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/basicsocket/recvmsg_nonblock_spec.rb b/spec/ruby/library/socket/basicsocket/recvmsg_nonblock_spec.rb
new file mode 100644
index 0000000000..698b9e7ba5
--- /dev/null
+++ b/spec/ruby/library/socket/basicsocket/recvmsg_nonblock_spec.rb
@@ -0,0 +1,204 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+describe 'BasicSocket#recvmsg_nonblock' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    describe 'using a disconnected socket' do
+      before do
+        @client = Socket.new(family, :DGRAM)
+        @server = Socket.new(family, :DGRAM)
+      end
+
+      after do
+        @client.close
+        @server.close
+      end
+
+      platform_is_not :windows do
+        describe 'using an unbound socket' do
+          it 'raises an exception extending IO::WaitReadable' do
+            lambda { @server.recvmsg_nonblock }.should raise_error(IO::WaitReadable)
+          end
+        end
+      end
+
+      describe 'using a bound socket' do
+        before do
+          @server.bind(Socket.sockaddr_in(0, ip_address))
+        end
+
+        describe 'without any data available' do
+          it 'raises an exception extending IO::WaitReadable' do
+            lambda { @server.recvmsg_nonblock }.should raise_error(IO::WaitReadable)
+          end
+        end
+
+        describe 'with data available' do
+          before do
+            @client.connect(@server.getsockname)
+
+            @client.write('hello')
+
+            IO.select([@server], nil, nil, 5)
+          end
+
+          it 'returns an Array containing the data, an Addrinfo and the flags' do
+            @server.recvmsg_nonblock.should be_an_instance_of(Array)
+          end
+
+          describe 'without a maximum message length' do
+            it 'reads all the available data' do
+              @server.recvmsg_nonblock[0].should == 'hello'
+            end
+          end
+
+          describe 'with a maximum message length' do
+            platform_is_not :windows do
+              it 'reads up to the maximum amount of bytes' do
+                @server.recvmsg_nonblock(2)[0].should == 'he'
+              end
+            end
+          end
+
+          describe 'the returned Array' do
+            before do
+              @array = @server.recvmsg_nonblock
+            end
+
+            it 'stores the message at index 0' do
+              @array[0].should == 'hello'
+            end
+
+            it 'stores an Addrinfo at index 1' do
+              @array[1].should be_an_instance_of(Addrinfo)
+            end
+
+            platform_is_not :windows do
+              it 'stores the flags at index 2' do
+                @array[2].should be_an_instance_of(Fixnum)
+              end
+            end
+
+            describe 'the returned Addrinfo' do
+              before do
+                @addr = @array[1]
+              end
+
+              it 'uses the IP address of the client' do
+                @addr.ip_address.should == @client.local_address.ip_address
+              end
+
+              it 'uses the correct address family' do
+                @addr.afamily.should == family
+              end
+
+              it 'uses the correct protocol family' do
+                @addr.pfamily.should == family
+              end
+
+              it 'uses the correct socket type' do
+                @addr.socktype.should == Socket::SOCK_DGRAM
+              end
+
+              it 'uses the port number of the client' do
+                @addr.ip_port.should == @client.local_address.ip_port
+              end
+            end
+          end
+        end
+      end
+    end
+
+    platform_is_not :windows do
+      describe 'using a connected socket' do
+        before do
+          @client = Socket.new(family, :STREAM)
+          @server = Socket.new(family, :STREAM)
+
+          @server.bind(Socket.sockaddr_in(0, ip_address))
+          @server.listen(1)
+
+          @client.connect(@server.getsockname)
+        end
+
+        after do
+          @client.close
+          @server.close
+        end
+
+        describe 'without any data available' do
+          it 'raises IO::WaitReadable' do
+            lambda {
+              socket, _ = @server.accept
+              begin
+                socket.recvmsg_nonblock
+              ensure
+                socket.close
+              end
+            }.should raise_error(IO::WaitReadable)
+          end
+        end
+
+        describe 'with data available' do
+          before do
+            @client.write('hello')
+
+            @socket, _ = @server.accept
+          end
+
+          after do
+            @socket.close
+          end
+
+          it 'returns an Array containing the data, an Addrinfo and the flags' do
+            @socket.recvmsg_nonblock.should be_an_instance_of(Array)
+          end
+
+          describe 'the returned Array' do
+            before do
+              @array = @socket.recvmsg_nonblock
+            end
+
+            it 'stores the message at index 0' do
+              @array[0].should == 'hello'
+            end
+
+            it 'stores an Addrinfo at index 1' do
+              @array[1].should be_an_instance_of(Addrinfo)
+            end
+
+            it 'stores the flags at index 2' do
+              @array[2].should be_an_instance_of(Fixnum)
+            end
+
+            describe 'the returned Addrinfo' do
+              before do
+                @addr = @array[1]
+              end
+
+              it 'raises when receiving the ip_address message' do
+                lambda { @addr.ip_address }.should raise_error(SocketError)
+              end
+
+              it 'uses the correct address family' do
+                @addr.afamily.should == Socket::AF_UNSPEC
+              end
+
+              it 'uses 0 for the protocol family' do
+                @addr.pfamily.should == 0
+              end
+
+              it 'uses the correct socket type' do
+                @addr.socktype.should == Socket::SOCK_STREAM
+              end
+
+              it 'raises when receiving the ip_port message' do
+                lambda { @addr.ip_port }.should raise_error(SocketError)
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/basicsocket/recvmsg_spec.rb b/spec/ruby/library/socket/basicsocket/recvmsg_spec.rb
new file mode 100644
index 0000000000..d7de83d72b
--- /dev/null
+++ b/spec/ruby/library/socket/basicsocket/recvmsg_spec.rb
@@ -0,0 +1,197 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+describe 'BasicSocket#recvmsg' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    describe 'using a disconnected socket' do
+      before do
+        @client = Socket.new(family, :DGRAM)
+        @server = Socket.new(family, :DGRAM)
+      end
+
+      after do
+        @client.close
+        @server.close
+      end
+
+      platform_is_not :windows do
+        describe 'using an unbound socket' do
+          it 'blocks the caller' do
+            lambda { @server.recvmsg }.should block_caller
+          end
+        end
+      end
+
+      describe 'using a bound socket' do
+        before do
+          @server.bind(Socket.sockaddr_in(0, ip_address))
+        end
+
+        describe 'without any data available' do
+          it 'blocks the caller' do
+            lambda { @server.recvmsg }.should block_caller
+          end
+        end
+
+        describe 'with data available' do
+          before do
+            @client.connect(@server.getsockname)
+
+            @client.write('hello')
+          end
+
+          it 'returns an Array containing the data, an Addrinfo and the flags' do
+            @server.recvmsg.should be_an_instance_of(Array)
+          end
+
+          describe 'without a maximum message length' do
+            it 'reads all the available data' do
+              @server.recvmsg[0].should == 'hello'
+            end
+          end
+
+          describe 'with a maximum message length' do
+            it 'reads up to the maximum amount of bytes' do
+              @server.recvmsg(2)[0].should == 'he'
+            end
+          end
+
+          describe 'the returned Array' do
+            before do
+              @array = @server.recvmsg
+            end
+
+            it 'stores the message at index 0' do
+              @array[0].should == 'hello'
+            end
+
+            it 'stores an Addrinfo at index 1' do
+              @array[1].should be_an_instance_of(Addrinfo)
+            end
+
+            platform_is_not :windows do
+              it 'stores the flags at index 2' do
+                @array[2].should be_an_instance_of(Fixnum)
+              end
+            end
+
+            describe 'the returned Addrinfo' do
+              before do
+                @addr = @array[1]
+              end
+
+              it 'uses the IP address of the client' do
+                @addr.ip_address.should == @client.local_address.ip_address
+              end
+
+              it 'uses the correct address family' do
+                @addr.afamily.should == family
+              end
+
+              it 'uses the correct protocol family' do
+                @addr.pfamily.should == family
+              end
+
+              it 'uses the correct socket type' do
+                @addr.socktype.should == Socket::SOCK_DGRAM
+              end
+
+              it 'uses the port number of the client' do
+                @addr.ip_port.should == @client.local_address.ip_port
+              end
+            end
+          end
+        end
+      end
+    end
+
+    platform_is_not :windows do
+      describe 'using a connected socket' do
+        before do
+          @client = Socket.new(family, :STREAM)
+          @server = Socket.new(family, :STREAM)
+
+          @server.bind(Socket.sockaddr_in(0, ip_address))
+          @server.listen(1)
+
+          @client.connect(@server.getsockname)
+        end
+
+        after do
+          @client.close
+          @server.close
+        end
+
+        describe 'without any data available' do
+          it 'blocks the caller' do
+            socket, _ = @server.accept
+            begin
+              lambda { socket.recvmsg }.should block_caller
+            ensure
+              socket.close
+            end
+          end
+        end
+
+        describe 'with data available' do
+          before do
+            @client.write('hello')
+            @socket, _ = @server.accept
+          end
+
+          after do
+            @socket.close
+          end
+
+          it 'returns an Array containing the data, an Addrinfo and the flags' do
+            @socket.recvmsg.should be_an_instance_of(Array)
+          end
+
+          describe 'the returned Array' do
+            before do
+              @array = @socket.recvmsg
+            end
+
+            it 'stores the message at index 0' do
+              @array[0].should == 'hello'
+            end
+
+            it 'stores an Addrinfo at index 1' do
+              @array[1].should be_an_instance_of(Addrinfo)
+            end
+
+            it 'stores the flags at index 2' do
+              @array[2].should be_an_instance_of(Fixnum)
+            end
+
+            describe 'the returned Addrinfo' do
+              before do
+                @addr = @array[1]
+              end
+
+              it 'raises when receiving the ip_address message' do
+                lambda { @addr.ip_address }.should raise_error(SocketError)
+              end
+
+              it 'uses the correct address family' do
+                @addr.afamily.should == Socket::AF_UNSPEC
+              end
+
+              it 'returns 0 for the protocol family' do
+                @addr.pfamily.should == 0
+              end
+
+              it 'uses the correct socket type' do
+                @addr.socktype.should == Socket::SOCK_STREAM
+              end
+
+              it 'raises when receiving the ip_port message' do
+                lambda { @addr.ip_port }.should raise_error(SocketError)
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/basicsocket/send_spec.rb b/spec/ruby/library/socket/basicsocket/send_spec.rb
index e2e0ce592e..c8d2af8f7a 100644
--- a/spec/ruby/library/socket/basicsocket/send_spec.rb
+++ b/spec/ruby/library/socket/basicsocket/send_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "BasicSocket#send" do
@@ -83,3 +83,132 @@ describe "BasicSocket#send" do
      data.should == 'hello'
   end
 end
+
+describe 'BasicSocket#send' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    describe 'using a disconnected socket' do
+      before do
+        @client = Socket.new(family, :DGRAM)
+        @server = Socket.new(family, :DGRAM)
+
+        @server.bind(Socket.sockaddr_in(0, ip_address))
+      end
+
+      after do
+        @client.close
+        @server.close
+      end
+
+      describe 'without a destination address' do
+        it "raises #{SocketSpecs.dest_addr_req_error}" do
+          lambda { @client.send('hello', 0) }.should raise_error(SocketSpecs.dest_addr_req_error)
+        end
+      end
+
+      describe 'with a destination address as a String' do
+        it 'returns the amount of sent bytes' do
+          @client.send('hello', 0, @server.getsockname).should == 5
+        end
+
+        it 'does not persist the connection after writing to the socket' do
+          @client.send('hello', 0, @server.getsockname)
+
+          lambda { @client.send('hello', 0) }.should raise_error(SocketSpecs.dest_addr_req_error)
+        end
+      end
+
+      describe 'with a destination address as an Addrinfo' do
+        it 'returns the amount of sent bytes' do
+          @client.send('hello', 0, @server.connect_address).should == 5
+        end
+      end
+    end
+
+    describe 'using a connected UDP socket' do
+      before do
+        @client = Socket.new(family, :DGRAM)
+        @server = Socket.new(family, :DGRAM)
+
+        @server.bind(Socket.sockaddr_in(0, ip_address))
+      end
+
+      after do
+        @client.close
+        @server.close
+      end
+
+      describe 'without a destination address argument' do
+        before do
+          @client.connect(@server.getsockname)
+        end
+
+        it 'returns the amount of bytes written' do
+          @client.send('hello', 0).should == 5
+        end
+      end
+
+      describe 'with a destination address argument' do
+        before do
+          @alt_server = Socket.new(family, :DGRAM)
+
+          @alt_server.bind(Socket.sockaddr_in(0, ip_address))
+        end
+
+        after do
+          @alt_server.close
+        end
+
+        it 'sends the message to the given address instead' do
+          @client.send('hello', 0, @alt_server.getsockname).should == 5
+
+          lambda { @server.recv(5) }.should block_caller
+
+          @alt_server.recv(5).should == 'hello'
+        end
+
+        it 'does not persist the alternative connection after writing to the socket' do
+          @client.send('hello', 0, @alt_server.getsockname)
+
+          @client.connect(@server.getsockname)
+          @client.send('world', 0)
+
+          @server.recv(5).should == 'world'
+        end
+      end
+    end
+
+    platform_is_not :windows do
+      describe 'using a connected TCP socket' do
+        before do
+          @client = Socket.new(family, :STREAM)
+          @server = Socket.new(family, :STREAM)
+
+          @server.bind(Socket.sockaddr_in(0, ip_address))
+          @server.listen(1)
+
+          @client.connect(@server.getsockname)
+        end
+
+        after do
+          @client.close
+          @server.close
+        end
+
+        describe 'using the MSG_OOB flag' do
+          it 'sends an out-of-band message' do
+            @server.setsockopt(:SOCKET, :OOBINLINE, true)
+
+            @client.send('a', Socket::MSG_OOB).should == 1
+
+            socket, _ = @server.accept
+            begin
+              socket.recv(1, Socket::MSG_OOB).should == 'a'
+            ensure
+              socket.close
+            end
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/basicsocket/sendmsg_nonblock_spec.rb b/spec/ruby/library/socket/basicsocket/sendmsg_nonblock_spec.rb
new file mode 100644
index 0000000000..de5e2aa749
--- /dev/null
+++ b/spec/ruby/library/socket/basicsocket/sendmsg_nonblock_spec.rb
@@ -0,0 +1,104 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+describe 'BasicSocket#sendmsg_nonblock' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    describe 'using a disconnected socket' do
+      before do
+        @client = Socket.new(family, :DGRAM)
+        @server = Socket.new(family, :DGRAM)
+
+        @server.bind(Socket.sockaddr_in(0, ip_address))
+      end
+
+      after do
+        @client.close
+        @server.close
+      end
+
+      describe 'without a destination address' do
+        it "raises #{SocketSpecs.dest_addr_req_error}" do
+          lambda { @client.sendmsg_nonblock('hello') }.should raise_error(SocketSpecs.dest_addr_req_error)
+        end
+      end
+
+      describe 'with a destination address as a String' do
+        it 'returns the amount of sent bytes' do
+          @client.sendmsg_nonblock('hello', 0, @server.getsockname).should == 5
+        end
+      end
+
+      describe 'with a destination address as an Addrinfo' do
+        it 'returns the amount of sent bytes' do
+          @client.sendmsg_nonblock('hello', 0, @server.connect_address).should == 5
+        end
+      end
+    end
+
+    describe 'using a connected UDP socket' do
+      before do
+        @client = Socket.new(family, :DGRAM)
+        @server = Socket.new(family, :DGRAM)
+
+        @server.bind(Socket.sockaddr_in(0, ip_address))
+      end
+
+      after do
+        @client.close
+        @server.close
+      end
+
+      describe 'without a destination address argument' do
+        before do
+          @client.connect(@server.getsockname)
+        end
+
+        it 'returns the amount of bytes written' do
+          @client.sendmsg_nonblock('hello').should == 5
+        end
+      end
+
+      describe 'with a destination address argument' do
+        before do
+          @alt_server = Socket.new(family, :DGRAM)
+          @alt_server.bind(Socket.sockaddr_in(0, ip_address))
+        end
+
+        after do
+          @alt_server.close
+        end
+
+        it 'sends the message to the given address instead' do
+          @client.sendmsg_nonblock('hello', 0, @alt_server.getsockname).should == 5
+          lambda { @server.recv(5) }.should block_caller
+          @alt_server.recv(5).should == 'hello'
+        end
+      end
+    end
+
+    platform_is_not :windows do
+      describe 'using a connected TCP socket' do
+        before do
+          @client = Socket.new(family, :STREAM)
+          @server = Socket.new(family, :STREAM)
+
+          @server.bind(Socket.sockaddr_in(0, ip_address))
+          @server.listen(1)
+
+          @client.connect(@server.getsockname)
+        end
+
+        after do
+          @client.close
+          @server.close
+        end
+
+        it 'raises IO::WaitWritable when the underlying buffer is full' do
+          lambda {
+            10.times { @client.sendmsg_nonblock('hello' * 1_000_000) }
+          }.should raise_error(IO::WaitWritable)
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/basicsocket/sendmsg_spec.rb b/spec/ruby/library/socket/basicsocket/sendmsg_spec.rb
new file mode 100644
index 0000000000..f2c11f443a
--- /dev/null
+++ b/spec/ruby/library/socket/basicsocket/sendmsg_spec.rb
@@ -0,0 +1,111 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+describe 'BasicSocket#sendmsg' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    describe 'using a disconnected socket' do
+      before do
+        @client = Socket.new(family, :DGRAM)
+        @server = Socket.new(family, :DGRAM)
+
+        @server.bind(Socket.sockaddr_in(0, ip_address))
+      end
+
+      after do
+        @client.close
+        @server.close
+      end
+
+      platform_is_not :windows do
+        describe 'without a destination address' do
+          it "raises #{SocketSpecs.dest_addr_req_error}" do
+            lambda { @client.sendmsg('hello') }.should raise_error(SocketSpecs.dest_addr_req_error)
+          end
+        end
+      end
+
+      describe 'with a destination address as a String' do
+        it 'returns the amount of sent bytes' do
+          @client.sendmsg('hello', 0, @server.getsockname).should == 5
+        end
+      end
+
+      describe 'with a destination address as an Addrinfo' do
+        it 'returns the amount of sent bytes' do
+          @client.sendmsg('hello', 0, @server.connect_address).should == 5
+        end
+      end
+    end
+
+    describe 'using a connected UDP socket' do
+      before do
+        @client = Socket.new(family, :DGRAM)
+        @server = Socket.new(family, :DGRAM)
+
+        @server.bind(Socket.sockaddr_in(0, ip_address))
+      end
+
+      after do
+        @client.close
+        @server.close
+      end
+
+      describe 'without a destination address argument' do
+        before do
+          @client.connect(@server.getsockname)
+        end
+
+        it 'returns the amount of bytes written' do
+          @client.sendmsg('hello').should == 5
+        end
+      end
+
+      describe 'with a destination address argument' do
+        before do
+          @alt_server = Socket.new(family, :DGRAM)
+
+          @alt_server.bind(Socket.sockaddr_in(0, ip_address))
+        end
+
+        after do
+          @alt_server.close
+        end
+
+        it 'sends the message to the given address instead' do
+          @client.sendmsg('hello', 0, @alt_server.getsockname).should == 5
+
+          lambda { @server.recv(5) }.should block_caller
+
+          @alt_server.recv(5).should == 'hello'
+        end
+      end
+    end
+
+    platform_is_not :windows do # spurious
+      describe 'using a connected TCP socket' do
+        before do
+          @client = Socket.new(family, :STREAM)
+          @server = Socket.new(family, :STREAM)
+
+          @server.bind(Socket.sockaddr_in(0, ip_address))
+          @server.listen(1)
+
+          @client.connect(@server.getsockname)
+        end
+
+        after do
+          @client.close
+          @server.close
+        end
+
+        it 'blocks when the underlying buffer is full' do
+          # Buffer sizes may differ per platform, so sadly this is the only
+          # reliable way of testing blocking behaviour.
+          lambda do
+            10.times { @client.sendmsg('hello' * 1_000_000) }
+          end.should block_caller
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/basicsocket/setsockopt_spec.rb b/spec/ruby/library/socket/basicsocket/setsockopt_spec.rb
index 7d2a303699..cafcfc202a 100644
--- a/spec/ruby/library/socket/basicsocket/setsockopt_spec.rb
+++ b/spec/ruby/library/socket/basicsocket/setsockopt_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "BasicSocket#setsockopt" do
@@ -211,3 +211,124 @@ describe "BasicSocket#setsockopt" do
     end
   end
 end
+
+describe 'BasicSocket#setsockopt' do
+  describe 'using a STREAM socket' do
+    before do
+      @socket = Socket.new(:INET, :STREAM)
+    end
+
+    after do
+      @socket.close
+    end
+
+    describe 'using separate arguments with Symbols' do
+      it 'raises TypeError when the first argument is nil' do
+        lambda { @socket.setsockopt(nil, :REUSEADDR, true) }.should raise_error(TypeError)
+      end
+
+      it 'sets a boolean option' do
+        @socket.setsockopt(:SOCKET, :REUSEADDR, true).should == 0
+        @socket.getsockopt(:SOCKET, :REUSEADDR).bool.should == true
+      end
+
+      it 'sets an integer option' do
+        @socket.setsockopt(:IP, :TTL, 255).should == 0
+        @socket.getsockopt(:IP, :TTL).int.should == 255
+      end
+
+      it 'sets an IPv6 boolean option' do
+        socket = Socket.new(:INET6, :STREAM)
+        begin
+          socket.setsockopt(:IPV6, :V6ONLY, true).should == 0
+          socket.getsockopt(:IPV6, :V6ONLY).bool.should == true
+        ensure
+          socket.close
+        end
+      end
+
+      platform_is_not :windows do
+        it 'raises Errno::EINVAL when setting an invalid option value' do
+          lambda { @socket.setsockopt(:SOCKET, :OOBINLINE, 'bla') }.should raise_error(Errno::EINVAL)
+        end
+      end
+    end
+
+    describe 'using separate arguments with Symbols' do
+      it 'sets a boolean option' do
+        @socket.setsockopt('SOCKET', 'REUSEADDR', true).should == 0
+        @socket.getsockopt(:SOCKET, :REUSEADDR).bool.should == true
+      end
+
+      it 'sets an integer option' do
+        @socket.setsockopt('IP', 'TTL', 255).should == 0
+        @socket.getsockopt(:IP, :TTL).int.should == 255
+      end
+    end
+
+    describe 'using separate arguments with constants' do
+      it 'sets a boolean option' do
+        @socket.setsockopt(Socket::SOL_SOCKET, Socket::SO_REUSEADDR, true).should == 0
+        @socket.getsockopt(:SOCKET, :REUSEADDR).bool.should == true
+      end
+
+      it 'sets an integer option' do
+        @socket.setsockopt(Socket::IPPROTO_IP, Socket::IP_TTL, 255).should == 0
+        @socket.getsockopt(:IP, :TTL).int.should == 255
+      end
+    end
+
+    describe 'using separate arguments with custom objects' do
+      it 'sets a boolean option' do
+        level = mock(:level)
+        name  = mock(:name)
+
+        level.stub!(:to_str).and_return('SOCKET')
+        name.stub!(:to_str).and_return('REUSEADDR')
+
+        @socket.setsockopt(level, name, true).should == 0
+      end
+    end
+
+    describe 'using a Socket::Option as the first argument' do
+      it 'sets a boolean option' do
+        @socket.setsockopt(Socket::Option.bool(:INET, :SOCKET, :REUSEADDR, true)).should == 0
+        @socket.getsockopt(:SOCKET, :REUSEADDR).bool.should == true
+      end
+
+      it 'sets an integer option' do
+        @socket.setsockopt(Socket::Option.int(:INET, :IP, :TTL, 255)).should == 0
+        @socket.getsockopt(:IP, :TTL).int.should == 255
+      end
+
+      it 'raises ArgumentError when passing 2 arguments' do
+        option = Socket::Option.bool(:INET, :SOCKET, :REUSEADDR, true)
+        lambda { @socket.setsockopt(option, :REUSEADDR) }.should raise_error(ArgumentError)
+      end
+
+      it 'raises TypeError when passing 3 arguments' do
+        option = Socket::Option.bool(:INET, :SOCKET, :REUSEADDR, true)
+        lambda { @socket.setsockopt(option, :REUSEADDR, true) }.should raise_error(TypeError)
+      end
+    end
+  end
+
+  with_feature :unix_socket do
+    describe 'using a UNIX socket' do
+      before do
+        @path = SocketSpecs.socket_path
+        @server = UNIXServer.new(@path)
+      end
+
+      after do
+        @server.close
+        rm_r @path
+      end
+
+      it 'sets a boolean option' do
+        @server.setsockopt(:SOCKET, :REUSEADDR, true)
+        @server.getsockopt(:SOCKET, :REUSEADDR).bool.should == true
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/basicsocket/shutdown_spec.rb b/spec/ruby/library/socket/basicsocket/shutdown_spec.rb
index 67b15908e5..40e2d77570 100644
--- a/spec/ruby/library/socket/basicsocket/shutdown_spec.rb
+++ b/spec/ruby/library/socket/basicsocket/shutdown_spec.rb
@@ -1,6 +1,155 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
-describe "Socket::BasicSocket#shutdown" do
+platform_is_not :windows do # hangs
+  describe "Socket::BasicSocket#shutdown" do
+    SocketSpecs.each_ip_protocol do |family, ip_address|
+      before do
+        @server = Socket.new(family, :STREAM)
+        @client = Socket.new(family, :STREAM)
 
+        @server.bind(Socket.sockaddr_in(0, ip_address))
+        @server.listen(1)
+
+        @client.connect(@server.getsockname)
+      end
+
+      after do
+        @client.close
+        @server.close
+      end
+
+      describe 'using a Fixnum' do
+        it 'shuts down a socket for reading' do
+          @client.shutdown(Socket::SHUT_RD)
+
+          @client.recv(1).should be_empty
+        end
+
+        it 'shuts down a socket for writing' do
+          @client.shutdown(Socket::SHUT_WR)
+
+          lambda { @client.write('hello') }.should raise_error(Errno::EPIPE)
+        end
+
+        it 'shuts down a socket for reading and writing' do
+          @client.shutdown(Socket::SHUT_RDWR)
+
+          @client.recv(1).should be_empty
+
+          lambda { @client.write('hello') }.should raise_error(Errno::EPIPE)
+        end
+
+        it 'raises ArgumentError when using an invalid option' do
+          lambda { @server.shutdown(666) }.should raise_error(ArgumentError)
+        end
+      end
+
+      describe 'using a Symbol' do
+        it 'shuts down a socket for reading using :RD' do
+          @client.shutdown(:RD)
+
+          @client.recv(1).should be_empty
+        end
+
+        it 'shuts down a socket for reading using :SHUT_RD' do
+          @client.shutdown(:SHUT_RD)
+
+          @client.recv(1).should be_empty
+        end
+
+        it 'shuts down a socket for writing using :WR' do
+          @client.shutdown(:WR)
+
+          lambda { @client.write('hello') }.should raise_error(Errno::EPIPE)
+        end
+
+        it 'shuts down a socket for writing using :SHUT_WR' do
+          @client.shutdown(:SHUT_WR)
+
+          lambda { @client.write('hello') }.should raise_error(Errno::EPIPE)
+        end
+
+        it 'shuts down a socket for reading and writing' do
+          @client.shutdown(:RDWR)
+
+          @client.recv(1).should be_empty
+
+          lambda { @client.write('hello') }.should raise_error(Errno::EPIPE)
+        end
+
+        it 'raises ArgumentError when using an invalid option' do
+          lambda { @server.shutdown(:Nope) }.should raise_error(SocketError)
+        end
+      end
+
+      describe 'using a String' do
+        it 'shuts down a socket for reading using "RD"' do
+          @client.shutdown('RD')
+
+          @client.recv(1).should be_empty
+        end
+
+        it 'shuts down a socket for reading using "SHUT_RD"' do
+          @client.shutdown('SHUT_RD')
+
+          @client.recv(1).should be_empty
+        end
+
+        it 'shuts down a socket for writing using "WR"' do
+          @client.shutdown('WR')
+
+          lambda { @client.write('hello') }.should raise_error(Errno::EPIPE)
+        end
+
+        it 'shuts down a socket for writing using "SHUT_WR"' do
+          @client.shutdown('SHUT_WR')
+
+          lambda { @client.write('hello') }.should raise_error(Errno::EPIPE)
+        end
+
+        it 'raises ArgumentError when using an invalid option' do
+          lambda { @server.shutdown('Nope') }.should raise_error(SocketError)
+        end
+      end
+
+      describe 'using an object that responds to #to_str' do
+        before do
+          @dummy = mock(:dummy)
+        end
+
+        it 'shuts down a socket for reading using "RD"' do
+          @dummy.stub!(:to_str).and_return('RD')
+
+          @client.shutdown(@dummy)
+
+          @client.recv(1).should be_empty
+        end
+
+        it 'shuts down a socket for reading using "SHUT_RD"' do
+          @dummy.stub!(:to_str).and_return('SHUT_RD')
+
+          @client.shutdown(@dummy)
+
+          @client.recv(1).should be_empty
+        end
+
+        it 'shuts down a socket for reading and writing' do
+          @dummy.stub!(:to_str).and_return('RDWR')
+
+          @client.shutdown(@dummy)
+
+          @client.recv(1).should be_empty
+
+          lambda { @client.write('hello') }.should raise_error(Errno::EPIPE)
+        end
+      end
+
+      describe 'using an object that does not respond to #to_str' do
+        it 'raises TypeError' do
+          lambda { @server.shutdown(mock(:dummy)) }.should raise_error(TypeError)
+        end
+      end
+    end
+  end
 end
diff --git a/spec/ruby/library/socket/constants/constants_spec.rb b/spec/ruby/library/socket/constants/constants_spec.rb
index 7e87aff2ee..2d44636abd 100644
--- a/spec/ruby/library/socket/constants/constants_spec.rb
+++ b/spec/ruby/library/socket/constants/constants_spec.rb
@@ -1,6 +1,5 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
-include Socket::Constants
 
 describe "Socket::Constants" do
   it "defines socket types" do
@@ -87,4 +86,17 @@ describe "Socket::Constants" do
       Socket::Constants.should have_constant(c)
     end
   end
+
+  platform_is_not :windows do
+    it 'defines SCM options' do
+      Socket::Constants.should have_constant('SCM_CREDENTIALS')
+    end
+
+    it 'defines error options' do
+      consts = ["EAI_ADDRFAMILY", "EAI_NODATA"]
+      consts.each do |c|
+        Socket::Constants.should have_constant(c)
+      end
+    end
+  end
 end
diff --git a/spec/ruby/library/socket/fixtures/classes.rb b/spec/ruby/library/socket/fixtures/classes.rb
index b8e5d2a38d..1098b04a5e 100644
--- a/spec/ruby/library/socket/fixtures/classes.rb
+++ b/spec/ruby/library/socket/fixtures/classes.rb
@@ -1,16 +1,16 @@
 require 'socket'
 
 module SocketSpecs
-  # helper to get the hostname associated to 127.0.0.1
-  def self.hostname
+  # helper to get the hostname associated to 127.0.0.1 or the given ip
+  def self.hostname(ip = "127.0.0.1")
     # Calculate each time, without caching, since the result might
     # depend on things like do_not_reverse_lookup mode, which is
     # changing from test to test
-    Socket.getaddrinfo("127.0.0.1", nil)[0][2]
+    Socket.getaddrinfo(ip, nil)[0][2]
   end
 
-  def self.hostnamev6
-    Socket.getaddrinfo("::1", nil)[0][2]
+  def self.hostname_reverse_lookup(ip = "127.0.0.1")
+    Socket.getaddrinfo(ip, nil, 0, 0, 0, 0, true)[0][2]
   end
 
   def self.addr(which=:ipv4)
@@ -47,6 +47,61 @@ module SocketSpecs
     File.delete(path) if File.exist?(path)
   end
 
+  def self.ipv6_available?
+    @ipv6_available ||= begin
+      server = TCPServer.new('::1', 0)
+    rescue Errno::EADDRNOTAVAIL
+      :no
+    else
+      server.close
+      :yes
+    end
+    @ipv6_available == :yes
+  end
+
+  def self.each_ip_protocol
+    describe 'using IPv4' do
+      yield Socket::AF_INET, '127.0.0.1', 'AF_INET'
+    end
+
+    guard -> { SocketSpecs.ipv6_available? } do
+      describe 'using IPv6' do
+        yield Socket::AF_INET6, '::1', 'AF_INET6'
+      end
+    end
+  end
+
+  def self.loop_with_timeout(timeout = 5)
+    require 'timeout'
+    time = Time.now
+
+    loop do
+      if Time.now - time >= timeout
+        raise TimeoutError, "Did not succeed within #{timeout} seconds"
+      end
+
+      sleep 0.01 # necessary on OSX; don't know why
+      yield
+    end
+  end
+
+  def self.wait_until_success(timeout = 5)
+    loop_with_timeout(timeout) do
+      begin
+        return yield
+      rescue
+      end
+    end
+  end
+
+  def self.dest_addr_req_error
+    error = Errno::EDESTADDRREQ
+    platform_is :windows do
+      error = Errno::ENOTCONN
+    end
+    error
+  end
+
   # TCPServer echo server accepting one connection
   class SpecTCPServer
     attr_reader :hostname, :port
diff --git a/spec/ruby/library/socket/ipsocket/addr_spec.rb b/spec/ruby/library/socket/ipsocket/addr_spec.rb
index 2e5ae51d15..07f4cb20c9 100644
--- a/spec/ruby/library/socket/ipsocket/addr_spec.rb
+++ b/spec/ruby/library/socket/ipsocket/addr_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "Socket::IPSocket#addr" do
@@ -40,3 +40,66 @@ describe "Socket::IPSocket#addr" do
     addrinfo[3].should == "127.0.0.1"
   end
 end
+
+describe 'Socket::IPSocket#addr' do
+  SocketSpecs.each_ip_protocol do |family, ip_address, family_name|
+    before do
+      @server = TCPServer.new(ip_address, 0)
+      @port = @server.connect_address.ip_port
+    end
+
+    after do
+      @server.close
+    end
+
+    describe 'without reverse lookups' do
+      before do
+        @hostname = Socket.getaddrinfo(ip_address, nil)[0][2]
+      end
+
+      it 'returns an Array containing address information' do
+        @server.addr.should == [family_name, @port, @hostname, ip_address]
+      end
+    end
+
+    describe 'with reverse lookups' do
+      before do
+        @hostname = Socket.getaddrinfo(ip_address, nil, nil, 0, 0, 0, true)[0][2]
+      end
+
+      describe 'using true as the argument' do
+        it 'returns an Array containing address information' do
+          @server.addr(true).should == [family_name, @port, @hostname, ip_address]
+        end
+      end
+
+      describe 'using :hostname as the argument' do
+        it 'returns an Array containing address information' do
+          @server.addr(:hostname).should == [family_name, @port, @hostname, ip_address]
+        end
+      end
+
+      describe 'using :cats as the argument' do
+        it 'raises ArgumentError' do
+          lambda { @server.addr(:cats) }.should raise_error(ArgumentError)
+        end
+      end
+    end
+
+    describe 'with do_not_reverse_lookup disabled on socket level' do
+      before do
+        @server.do_not_reverse_lookup = false
+
+        @hostname = Socket.getaddrinfo(ip_address, nil, nil, 0, 0, 0, true)[0][2]
+      end
+
+      after do
+        @server.do_not_reverse_lookup = true
+      end
+
+      it 'returns an Array containing address information' do
+        @server.addr.should == [family_name, @port, @hostname, ip_address]
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/ipsocket/getaddress_spec.rb b/spec/ruby/library/socket/ipsocket/getaddress_spec.rb
index 10161dbaea..2ee35af5b5 100644
--- a/spec/ruby/library/socket/ipsocket/getaddress_spec.rb
+++ b/spec/ruby/library/socket/ipsocket/getaddress_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "Socket::IPSocket#getaddress" do
@@ -11,6 +11,7 @@ describe "Socket::IPSocket#getaddress" do
   it "returns the IP address when passed an IP" do
     IPSocket.getaddress("127.0.0.1").should == "127.0.0.1"
     IPSocket.getaddress("0.0.0.0").should == "0.0.0.0"
+    IPSocket.getaddress('::1').should == '::1'
   end
 
   # There is no way to make this fail-proof on all machines, because
@@ -23,5 +24,4 @@ describe "Socket::IPSocket#getaddress" do
       }.should raise_error(SocketError)
     end
   end
-
 end
diff --git a/spec/ruby/library/socket/ipsocket/peeraddr_spec.rb b/spec/ruby/library/socket/ipsocket/peeraddr_spec.rb
index bfbe0b2c12..26aa61d1c4 100644
--- a/spec/ruby/library/socket/ipsocket/peeraddr_spec.rb
+++ b/spec/ruby/library/socket/ipsocket/peeraddr_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "Socket::IPSocket#peeraddr" do
@@ -49,3 +49,69 @@ describe "Socket::IPSocket#peeraddr" do
     addrinfo[3].should == "127.0.0.1"
   end
 end
+
+describe 'Socket::IPSocket#peeraddr' do
+  SocketSpecs.each_ip_protocol do |family, ip_address, family_name|
+    before do
+      @server = TCPServer.new(ip_address, 0)
+      @port   = @server.connect_address.ip_port
+      @client = TCPSocket.new(ip_address, @port)
+    end
+
+    after do
+      @client.close
+      @server.close
+    end
+
+    describe 'without reverse lookups' do
+      before do
+        @hostname = Socket.getaddrinfo(ip_address, nil)[0][2]
+      end
+
+      it 'returns an Array containing address information' do
+        @client.peeraddr.should == [family_name, @port, @hostname, ip_address]
+      end
+    end
+
+    describe 'with reverse lookups' do
+      before do
+        @hostname = Socket.getaddrinfo(ip_address, nil, nil, 0, 0, 0, true)[0][2]
+      end
+
+      describe 'using true as the argument' do
+        it 'returns an Array containing address information' do
+          @client.peeraddr(true).should == [family_name, @port, @hostname, ip_address]
+        end
+      end
+
+      describe 'using :hostname as the argument' do
+        it 'returns an Array containing address information' do
+          @client.peeraddr(:hostname).should == [family_name, @port, @hostname, ip_address]
+        end
+      end
+
+      describe 'using :cats as the argument' do
+        it 'raises ArgumentError' do
+          lambda { @client.peeraddr(:cats) }.should raise_error(ArgumentError)
+        end
+      end
+    end
+
+    describe 'with do_not_reverse_lookup disabled on socket level' do
+      before do
+        @client.do_not_reverse_lookup = false
+
+        @hostname = Socket.getaddrinfo(ip_address, nil, nil, 0, 0, 0, true)[0][2]
+        @port     = @client.local_address.ip_port
+      end
+
+      after do
+        @client.do_not_reverse_lookup = true
+      end
+
+      it 'returns an Array containing address information' do
+        @client.addr.should == [family_name, @port, @hostname, ip_address]
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/ipsocket/recvfrom_spec.rb b/spec/ruby/library/socket/ipsocket/recvfrom_spec.rb
index b8537fbe47..3bcb7b8f02 100644
--- a/spec/ruby/library/socket/ipsocket/recvfrom_spec.rb
+++ b/spec/ruby/library/socket/ipsocket/recvfrom_spec.rb
@@ -1,8 +1,7 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "Socket::IPSocket#recvfrom" do
-
   before :each do
     @server = TCPServer.new("127.0.0.1", 0)
     @port = @server.addr[1]
@@ -68,5 +67,57 @@ describe "Socket::IPSocket#recvfrom" do
     # This does not apply to every platform, dependant on recvfrom(2)
     # data.last.should == nil
   end
+end
+
+describe 'Socket::IPSocket#recvfrom' do
+  SocketSpecs.each_ip_protocol do |family, ip_address, family_name|
+    before do
+      @server = UDPSocket.new(family)
+      @client = UDPSocket.new(family)
+
+      @server.bind(ip_address, 0)
+      @client.connect(ip_address, @server.connect_address.ip_port)
+
+      @hostname = Socket.getaddrinfo(ip_address, nil)[0][2]
+    end
+
+    after do
+      @client.close
+      @server.close
+    end
+
+    it 'returns an Array containing up to N bytes and address information' do
+      @client.write('hello')
+
+      port = @client.local_address.ip_port
+      ret  = @server.recvfrom(2)
+
+      ret.should == ['he', [family_name, port, @hostname, ip_address]]
+    end
 
+    it 'allows specifying of flags when receiving data' do
+      @client.write('hello')
+
+      @server.recvfrom(2, Socket::MSG_PEEK)[0].should == 'he'
+
+      @server.recvfrom(2)[0].should == 'he'
+    end
+
+    describe 'using reverse lookups' do
+      before do
+        @server.do_not_reverse_lookup = false
+
+        @hostname = Socket.getaddrinfo(ip_address, nil, 0, 0, 0, 0, true)[0][2]
+      end
+
+      it 'includes the hostname in the address Array' do
+        @client.write('hello')
+
+        port = @client.local_address.ip_port
+        ret  = @server.recvfrom(2)
+
+        ret.should == ['he', [family_name, port, @hostname, ip_address]]
+      end
+    end
+  end
 end
diff --git a/spec/ruby/library/socket/option/bool_spec.rb b/spec/ruby/library/socket/option/bool_spec.rb
index 31be00fee3..c4f8a277ba 100644
--- a/spec/ruby/library/socket/option/bool_spec.rb
+++ b/spec/ruby/library/socket/option/bool_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "Socket::Option.bool" do
@@ -18,8 +18,10 @@ describe "Socket::Option#bool" do
     Socket::Option.bool(:INET, :SOCKET, :KEEPALIVE, false).bool.should == false
   end
 
-  it "raises TypeError if option has not good size" do
-    so = Socket::Option.new(:UNSPEC, :SOCKET, :SO_LINGER, [0, 0].pack('i*'))
-    lambda { so.bool }.should raise_error(TypeError)
+  platform_is_not :windows do
+    it 'raises TypeError when called on a non boolean option' do
+      opt = Socket::Option.linger(1, 4)
+      lambda { opt.bool }.should raise_error(TypeError)
+    end
   end
 end
diff --git a/spec/ruby/library/socket/option/initialize_spec.rb b/spec/ruby/library/socket/option/initialize_spec.rb
new file mode 100644
index 0000000000..986cfa8ad4
--- /dev/null
+++ b/spec/ruby/library/socket/option/initialize_spec.rb
@@ -0,0 +1,83 @@
+require_relative '../spec_helper'
+
+describe 'Socket::Option#initialize' do
+  before do
+    @bool = [0].pack('i')
+  end
+
+  describe 'using Fixnums' do
+    it 'returns a Socket::Option' do
+      opt = Socket::Option
+        .new(Socket::AF_INET, Socket::SOL_SOCKET, Socket::SO_KEEPALIVE, @bool)
+
+      opt.should be_an_instance_of(Socket::Option)
+
+      opt.family.should  == Socket::AF_INET
+      opt.level.should   == Socket::SOL_SOCKET
+      opt.optname.should == Socket::SO_KEEPALIVE
+      opt.data.should    == @bool
+    end
+  end
+
+  describe 'using Symbols' do
+    it 'returns a Socket::Option' do
+      opt = Socket::Option.new(:INET, :SOCKET, :KEEPALIVE, @bool)
+
+      opt.should be_an_instance_of(Socket::Option)
+
+      opt.family.should  == Socket::AF_INET
+      opt.level.should   == Socket::SOL_SOCKET
+      opt.optname.should == Socket::SO_KEEPALIVE
+      opt.data.should    == @bool
+    end
+
+    it 'raises when using an invalid address family' do
+      lambda {
+        Socket::Option.new(:INET2, :SOCKET, :KEEPALIVE, @bool)
+      }.should raise_error(SocketError)
+    end
+
+    it 'raises when using an invalid level' do
+      lambda {
+        Socket::Option.new(:INET, :CATS, :KEEPALIVE, @bool)
+      }.should raise_error(SocketError)
+    end
+
+    it 'raises when using an invalid option name' do
+      lambda {
+        Socket::Option.new(:INET, :SOCKET, :CATS, @bool)
+      }.should raise_error(SocketError)
+    end
+  end
+
+  describe 'using Strings' do
+    it 'returns a Socket::Option' do
+      opt = Socket::Option.new('INET', 'SOCKET', 'KEEPALIVE', @bool)
+
+      opt.should be_an_instance_of(Socket::Option)
+
+      opt.family.should  == Socket::AF_INET
+      opt.level.should   == Socket::SOL_SOCKET
+      opt.optname.should == Socket::SO_KEEPALIVE
+      opt.data.should    == @bool
+    end
+
+    it 'raises when using an invalid address family' do
+      lambda {
+        Socket::Option.new('INET2', 'SOCKET', 'KEEPALIVE', @bool)
+      }.should raise_error(SocketError)
+    end
+
+    it 'raises when using an invalid level' do
+      lambda {
+        Socket::Option.new('INET', 'CATS', 'KEEPALIVE', @bool)
+      }.should raise_error(SocketError)
+    end
+
+    it 'raises when using an invalid option name' do
+      lambda {
+        Socket::Option.new('INET', 'SOCKET', 'CATS', @bool)
+      }.should raise_error(SocketError)
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/option/inspect_spec.rb b/spec/ruby/library/socket/option/inspect_spec.rb
index 2a03421710..ebea940d2f 100644
--- a/spec/ruby/library/socket/option/inspect_spec.rb
+++ b/spec/ruby/library/socket/option/inspect_spec.rb
@@ -1,7 +1,6 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
-require 'socket'
 
 describe 'Socket::Option#inspect' do
   it 'correctly returns SO_LINGER value' do
diff --git a/spec/ruby/library/socket/option/int_spec.rb b/spec/ruby/library/socket/option/int_spec.rb
index b270374f62..5c67ec26d8 100644
--- a/spec/ruby/library/socket/option/int_spec.rb
+++ b/spec/ruby/library/socket/option/int_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "Socket::Option.int" do
@@ -10,6 +10,17 @@ describe "Socket::Option.int" do
     so.optname.should == Socket::Constants::SO_KEEPALIVE
     so.data.should == [5].pack('i')
   end
+
+  it 'returns a Socket::Option' do
+    opt = Socket::Option.int(:INET, :IP, :TTL, 4)
+
+    opt.should be_an_instance_of(Socket::Option)
+
+    opt.family.should  == Socket::AF_INET
+    opt.level.should   == Socket::IPPROTO_IP
+    opt.optname.should == Socket::IP_TTL
+    opt.data.should    == [4].pack('i')
+  end
 end
 
 describe "Socket::Option#int" do
@@ -19,10 +30,14 @@ describe "Socket::Option#int" do
 
     so = Socket::Option.int(:INET, :SOCKET, :KEEPALIVE, 32765)
     so.int.should == 32765
+
+    Socket::Option.int(:INET, :IP, :TTL, 4).int.should == 4
   end
 
-  it "raises TypeError if option has not good size" do
-    so = Socket::Option.new(:UNSPEC, :SOCKET, :SO_LINGER, [0, 0].pack('i*'))
-    lambda { so.int }.should raise_error(TypeError)
+  platform_is_not :windows do
+    it 'raises TypeError when called on a non integer option' do
+      opt = Socket::Option.linger(1, 4)
+      lambda { opt.int }.should raise_error(TypeError)
+    end
   end
 end
diff --git a/spec/ruby/library/socket/option/linger_spec.rb b/spec/ruby/library/socket/option/linger_spec.rb
index 2090c8a0e8..94467ebf71 100644
--- a/spec/ruby/library/socket/option/linger_spec.rb
+++ b/spec/ruby/library/socket/option/linger_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 option_pack = 'i*'
@@ -10,9 +10,11 @@ describe "Socket::Option.linger" do
   it "creates a new Socket::Option for SO_LINGER" do
     so = Socket::Option.linger(1, 10)
     so.should be_an_instance_of(Socket::Option)
+
     so.family.should == Socket::Constants::AF_UNSPEC
     so.level.should == Socket::Constants::SOL_SOCKET
     so.optname.should == Socket::Constants::SO_LINGER
+
     so.data.should == [1, 10].pack(option_pack)
   end
 
@@ -53,10 +55,22 @@ describe "Socket::Option#linger" do
     lambda { so.linger }.should raise_error(TypeError)
   end
 
+  it 'raises TypeError when called on a non SOL_SOCKET/SO_LINGER option' do
+    opt = Socket::Option.int(:INET, :IP, :TTL, 4)
+
+    lambda { opt.linger }.should raise_error(TypeError)
+  end
+
   platform_is_not :windows do
     it "raises TypeError if option has not good size" do
       so = Socket::Option.int(:AF_UNSPEC, :SOL_SOCKET, :LINGER, 1)
       lambda { so.linger }.should raise_error(TypeError)
     end
   end
+
+  it 'raises TypeError when called on a non linger option' do
+    opt = Socket::Option.new(:INET, :SOCKET, :LINGER, '')
+
+    lambda { opt.linger }.should raise_error(TypeError)
+  end
 end
diff --git a/spec/ruby/library/socket/option/new_spec.rb b/spec/ruby/library/socket/option/new_spec.rb
index b2c76fb24d..f3b7b31c91 100644
--- a/spec/ruby/library/socket/option/new_spec.rb
+++ b/spec/ruby/library/socket/option/new_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "Socket::Option.new" do
diff --git a/spec/ruby/library/socket/shared/pack_sockaddr.rb b/spec/ruby/library/socket/shared/pack_sockaddr.rb
index 4ffa02a8d8..714becc488 100644
--- a/spec/ruby/library/socket/shared/pack_sockaddr.rb
+++ b/spec/ruby/library/socket/shared/pack_sockaddr.rb
@@ -18,10 +18,28 @@ describe :socket_pack_sockaddr_in, shared: true do
     sockaddr_in = Socket.public_send(@method, nil, '127.0.0.1')
     Socket.unpack_sockaddr_in(sockaddr_in).should == [0, '127.0.0.1']
   end
+
+  describe 'using an IPv4 address' do
+    it 'returns a String of 16 bytes' do
+      str = Socket.public_send(@method, 80, '127.0.0.1')
+
+      str.should be_an_instance_of(String)
+      str.bytesize.should == 16
+    end
+  end
+
+  describe 'using an IPv6 address' do
+    it 'returns a String of 28 bytes' do
+      str = Socket.public_send(@method, 80, '::1')
+
+      str.should be_an_instance_of(String)
+      str.bytesize.should == 28
+    end
+  end
 end
 
 describe :socket_pack_sockaddr_un, shared: true do
-  platform_is_not :windows do
+  with_feature :unix_socket do
     it 'should be idempotent' do
       bytes = Socket.public_send(@method, '/tmp/foo').bytes
       bytes[2..9].should == [47, 116, 109, 112, 47, 102, 111, 111]
@@ -40,10 +58,28 @@ describe :socket_pack_sockaddr_un, shared: true do
     end
   end
 
+  platform_is :linux do
+    it 'returns a String of 110 bytes' do
+      str = Socket.public_send(@method, '/tmp/test.sock')
+
+      str.should be_an_instance_of(String)
+      str.bytesize.should == 110
+    end
+  end
+
+  platform_is :bsd do
+    it 'returns a String of 106 bytes' do
+      str = Socket.public_send(@method, '/tmp/test.sock')
+
+      str.should be_an_instance_of(String)
+      str.bytesize.should == 106
+    end
+  end
+
   platform_is_not :windows, :aix do
-    it "raises if path length exceeds max size" do
+    it "raises ArgumentError for paths that are too long" do
       # AIX doesn't raise error
-      long_path = Array.new(512, 0).join
+      long_path = 'a' * 110
       lambda { Socket.public_send(@method, long_path) }.should raise_error(ArgumentError)
     end
   end
diff --git a/spec/ruby/library/socket/shared/recv_nonblock.rb b/spec/ruby/library/socket/shared/recv_nonblock.rb
deleted file mode 100644
index 2b584d52a2..0000000000
--- a/spec/ruby/library/socket/shared/recv_nonblock.rb
+++ /dev/null
@@ -1,52 +0,0 @@
-describe :socket_recv_nonblock, shared: true do
-  before :each do
-    @s1 = Socket.new(Socket::AF_INET, Socket::SOCK_DGRAM, 0)
-    @s2 = Socket.new(Socket::AF_INET, Socket::SOCK_DGRAM, 0)
-  end
-
-  after :each do
-    @s1.close unless @s1.closed?
-    @s2.close unless @s2.closed?
-  end
-
-  it "raises an exception extending IO::WaitReadable if there's no data available" do
-    @s1.bind(Socket.pack_sockaddr_in(0, "127.0.0.1"))
-    lambda {
-      @s1.recv_nonblock(5)
-    }.should raise_error(IO::WaitReadable) { |e|
-      platform_is_not :windows do
-        e.should be_kind_of(Errno::EAGAIN)
-      end
-      platform_is :windows do
-        e.should be_kind_of(Errno::EWOULDBLOCK)
-      end
-    }
-  end
-
-  it "receives data after it's ready" do
-    @s1.bind(Socket.pack_sockaddr_in(0, "127.0.0.1"))
-    @s2.send("aaa", 0, @s1.getsockname)
-    IO.select([@s1], nil, nil, 2)
-    @s1.recv_nonblock(5).should == "aaa"
-  end
-
-  it "allows an output buffer as third argument" do
-    @s1.bind(Socket.pack_sockaddr_in(0, "127.0.0.1"))
-    @s2.send("data", 0, @s1.getsockname)
-    IO.select([@s1], nil, nil, 2)
-
-    buf = "foo"
-    @s1.recv_nonblock(5, 0, buf)
-    buf.should == "data"
-  end
-
-  it "does not block if there's no data available" do
-    @s1.bind(Socket.pack_sockaddr_in(0, "127.0.0.1"))
-    @s2.send("a", 0, @s1.getsockname)
-    IO.select([@s1], nil, nil, 2)
-    @s1.recv_nonblock(1).should == "a"
-    lambda {
-      @s1.recv_nonblock(5)
-    }.should raise_error(IO::WaitReadable)
-  end
-end
diff --git a/spec/ruby/library/socket/shared/socketpair.rb b/spec/ruby/library/socket/shared/socketpair.rb
index 03ee0e1a52..1e08deccc2 100644
--- a/spec/ruby/library/socket/shared/socketpair.rb
+++ b/spec/ruby/library/socket/shared/socketpair.rb
@@ -19,5 +19,120 @@ describe :socket_socketpair, shared: true do
         s2.close
       end
     end
+
+    describe 'using a Fixnum as the 1st and 2nd argument' do
+      it 'returns two Socket objects' do
+        s1, s2 = Socket.public_send(@method, Socket::AF_UNIX, Socket::SOCK_STREAM)
+
+        s1.should be_an_instance_of(Socket)
+        s2.should be_an_instance_of(Socket)
+        s1.close
+        s2.close
+      end
+    end
+
+    describe 'using a Symbol as the 1st and 2nd argument' do
+      it 'returns two Socket objects' do
+        s1, s2 = Socket.public_send(@method, :UNIX, :STREAM)
+
+        s1.should be_an_instance_of(Socket)
+        s2.should be_an_instance_of(Socket)
+        s1.close
+        s2.close
+      end
+
+      it 'raises SocketError for an unknown address family' do
+        lambda { Socket.public_send(@method, :CATS, :STREAM) }.should raise_error(SocketError)
+      end
+
+      it 'raises SocketError for an unknown socket type' do
+        lambda { Socket.public_send(@method, :UNIX, :CATS) }.should raise_error(SocketError)
+      end
+    end
+
+    describe 'using a String as the 1st and 2nd argument' do
+      it 'returns two Socket objects' do
+        s1, s2 = Socket.public_send(@method, 'UNIX', 'STREAM')
+
+        s1.should be_an_instance_of(Socket)
+        s2.should be_an_instance_of(Socket)
+        s1.close
+        s2.close
+      end
+
+      it 'raises SocketError for an unknown address family' do
+        lambda { Socket.public_send(@method, 'CATS', 'STREAM') }.should raise_error(SocketError)
+      end
+
+      it 'raises SocketError for an unknown socket type' do
+        lambda { Socket.public_send(@method, 'UNIX', 'CATS') }.should raise_error(SocketError)
+      end
+    end
+
+    describe 'using an object that responds to #to_str as the 1st and 2nd argument' do
+      it 'returns two Socket objects' do
+        family = mock(:family)
+        type   = mock(:type)
+
+        family.stub!(:to_str).and_return('UNIX')
+        type.stub!(:to_str).and_return('STREAM')
+
+        s1, s2 = Socket.public_send(@method, family, type)
+
+        s1.should be_an_instance_of(Socket)
+        s2.should be_an_instance_of(Socket)
+        s1.close
+        s2.close
+      end
+
+      it 'raises TypeError when #to_str does not return a String' do
+        family = mock(:family)
+        type   = mock(:type)
+
+        family.stub!(:to_str).and_return(Socket::AF_UNIX)
+        type.stub!(:to_str).and_return(Socket::SOCK_STREAM)
+
+        lambda { Socket.public_send(@method, family, type) }.should raise_error(TypeError)
+      end
+
+      it 'raises SocketError for an unknown address family' do
+        family = mock(:family)
+        type   = mock(:type)
+
+        family.stub!(:to_str).and_return('CATS')
+        type.stub!(:to_str).and_return('STREAM')
+
+        lambda { Socket.public_send(@method, family, type) }.should raise_error(SocketError)
+      end
+
+      it 'raises SocketError for an unknown socket type' do
+        family = mock(:family)
+        type   = mock(:type)
+
+        family.stub!(:to_str).and_return('UNIX')
+        type.stub!(:to_str).and_return('CATS')
+
+        lambda { Socket.public_send(@method, family, type) }.should raise_error(SocketError)
+      end
+    end
+
+    it 'accepts a custom protocol as a Fixnum as the 3rd argument' do
+      s1, s2 = Socket.public_send(@method, :UNIX, :STREAM, Socket::IPPROTO_IP)
+      s1.should be_an_instance_of(Socket)
+      s2.should be_an_instance_of(Socket)
+      s1.close
+      s2.close
+    end
+
+    it 'connects the returned Socket objects' do
+      s1, s2 = Socket.public_send(@method, :UNIX, :STREAM)
+      begin
+        s1.write('hello')
+        s2.recv(5).should == 'hello'
+      ensure
+        s1.close
+        s2.close
+      end
+    end
   end
 end
diff --git a/spec/ruby/library/socket/socket/accept_loop_spec.rb b/spec/ruby/library/socket/socket/accept_loop_spec.rb
new file mode 100644
index 0000000000..88bd1c556c
--- /dev/null
+++ b/spec/ruby/library/socket/socket/accept_loop_spec.rb
@@ -0,0 +1,80 @@
+require_relative '../spec_helper'
+
+describe 'Socket.accept_loop' do
+  before do
+    @server = Socket.new(:INET, :STREAM)
+    @client = Socket.new(:INET, :STREAM)
+
+    @server.bind(Socket.sockaddr_in(0, '127.0.0.1'))
+    @server.listen(1)
+  end
+
+  after do
+    @client.close
+    @server.close
+  end
+
+  describe 'using an Array of Sockets' do
+    describe 'without any available connections' do
+      it 'blocks the caller' do
+        lambda { Socket.accept_loop([@server]) }.should block_caller
+      end
+    end
+
+    describe 'with available connections' do
+      before do
+        @client.connect(@server.getsockname)
+      end
+
+      it 'yields a Socket and an Addrinfo' do
+        conn = nil
+        addr = nil
+
+        Socket.accept_loop([@server]) do |connection, address|
+          conn = connection
+          addr = address
+          break
+        end
+
+        begin
+          conn.should be_an_instance_of(Socket)
+          addr.should be_an_instance_of(Addrinfo)
+        ensure
+          conn.close
+        end
+      end
+    end
+  end
+
+  describe 'using separate Socket arguments' do
+    describe 'without any available connections' do
+      it 'blocks the caller' do
+        lambda { Socket.accept_loop(@server) }.should block_caller
+      end
+    end
+
+    describe 'with available connections' do
+      before do
+        @client.connect(@server.getsockname)
+      end
+
+      it 'yields a Socket and an Addrinfo' do
+        conn = nil
+        addr = nil
+
+        Socket.accept_loop(@server) do |connection, address|
+          conn = connection
+          addr = address
+          break
+        end
+
+        begin
+          conn.should be_an_instance_of(Socket)
+          addr.should be_an_instance_of(Addrinfo)
+        ensure
+          conn.close
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/accept_nonblock_spec.rb b/spec/ruby/library/socket/socket/accept_nonblock_spec.rb
index 44f3be9c0e..201d472f16 100644
--- a/spec/ruby/library/socket/socket/accept_nonblock_spec.rb
+++ b/spec/ruby/library/socket/socket/accept_nonblock_spec.rb
@@ -1,8 +1,6 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
-require 'socket'
-
 describe "Socket#accept_nonblock" do
   before :each do
     @hostname = "127.0.0.1"
@@ -33,3 +31,106 @@ describe "Socket#accept_nonblock" do
     @socket.accept_nonblock(exception: false).should == :wait_readable
   end
 end
+
+describe 'Socket#accept_nonblock' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before do
+      @server = Socket.new(family, :STREAM, 0)
+      @sockaddr = Socket.sockaddr_in(0, ip_address)
+    end
+
+    after do
+      @server.close unless @server.closed?
+    end
+
+    describe 'using an unbound socket' do
+      it 'raises Errno::EINVAL' do
+        lambda { @server.accept_nonblock }.should raise_error(Errno::EINVAL)
+      end
+    end
+
+    describe "using a bound socket that's not listening" do
+      before do
+        @server.bind(@sockaddr)
+      end
+
+      it 'raises Errno::EINVAL' do
+        lambda { @server.accept_nonblock }.should raise_error(Errno::EINVAL)
+      end
+    end
+
+    describe 'using a closed socket' do
+      it 'raises IOError' do
+        @server.close
+
+        lambda { @server.accept_nonblock }.should raise_error(IOError)
+      end
+    end
+
+    describe "using a bound socket that's listening" do
+      before do
+        @server.bind(@sockaddr)
+        @server.listen(1)
+      end
+
+      describe 'without a connected client' do
+        it 'raises IO::WaitReadable' do
+          lambda { @server.accept_nonblock }.should raise_error(IO::WaitReadable)
+        end
+      end
+
+      platform_is_not :windows do
+        describe 'with a connected client' do
+          before do
+            addr    = Socket.sockaddr_in(@server.local_address.ip_port, ip_address)
+            @client = Socket.new(family, :STREAM, 0)
+
+            @client.connect(addr)
+          end
+
+          after do
+            @socket.close if @socket
+            @client.close
+          end
+
+          it 'returns an Array containing a Socket and an Addrinfo' do
+            @socket, addrinfo = @server.accept_nonblock
+
+            @socket.should be_an_instance_of(Socket)
+            addrinfo.should be_an_instance_of(Addrinfo)
+          end
+
+          describe 'the returned Addrinfo' do
+            before do
+              @socket, @addr = @server.accept_nonblock
+            end
+
+            it 'uses AF_INET as the address family' do
+              @addr.afamily.should == family
+            end
+
+            it 'uses PF_INET as the protocol family' do
+              @addr.pfamily.should == family
+            end
+
+            it 'uses SOCK_STREAM as the socket type' do
+              @addr.socktype.should == Socket::SOCK_STREAM
+            end
+
+            it 'uses 0 as the protocol' do
+              @addr.protocol.should == 0
+            end
+
+            it 'uses the same IP address as the client Socket' do
+              @addr.ip_address.should == @client.local_address.ip_address
+            end
+
+            it 'uses the same port as the client Socket' do
+              @addr.ip_port.should == @client.local_address.ip_port
+            end
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/accept_spec.rb b/spec/ruby/library/socket/socket/accept_spec.rb
index 1658a2b81f..2c71d435ac 100644
--- a/spec/ruby/library/socket/socket/accept_spec.rb
+++ b/spec/ruby/library/socket/socket/accept_spec.rb
@@ -1,2 +1,122 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
+
+describe 'Socket#accept' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before do
+      @server   = Socket.new(family, :STREAM, 0)
+      @sockaddr = Socket.sockaddr_in(0, ip_address)
+    end
+
+    after do
+      @server.close unless @server.closed?
+    end
+
+    platform_is_not :windows do # hangs
+      describe 'using an unbound socket'  do
+        it 'raises Errno::EINVAL' do
+          lambda { @server.accept }.should raise_error(Errno::EINVAL)
+        end
+      end
+
+      describe "using a bound socket that's not listening" do
+        before do
+          @server.bind(@sockaddr)
+        end
+
+        it 'raises Errno::EINVAL' do
+          lambda { @server.accept }.should raise_error(Errno::EINVAL)
+        end
+      end
+    end
+
+    describe 'using a closed socket' do
+      it 'raises IOError' do
+        @server.close
+
+        lambda { @server.accept }.should raise_error(IOError)
+      end
+    end
+
+    describe "using a bound socket that's listening" do
+      before do
+        @server.bind(@sockaddr)
+        @server.listen(1)
+
+        server_ip    = @server.local_address.ip_port
+        @server_addr = Socket.sockaddr_in(server_ip, ip_address)
+      end
+
+      describe 'without a connected client' do
+        it 'blocks the caller until a connection is available' do
+          client = Socket.new(family, :STREAM, 0)
+          thread = Thread.new do
+            @server.accept
+          end
+
+          client.connect(@server_addr)
+
+          thread.join(5)
+          value = thread.value
+          begin
+            value.should be_an_instance_of(Array)
+          ensure
+            client.close
+            value[0].close
+          end
+        end
+      end
+
+      describe 'with a connected client' do
+        before do
+          addr    = Socket.sockaddr_in(@server.local_address.ip_port, ip_address)
+          @client = Socket.new(family, :STREAM, 0)
+
+          @client.connect(addr)
+        end
+
+        after do
+          @socket.close if @socket
+          @client.close
+        end
+
+        it 'returns an Array containing a Socket and an Addrinfo' do
+          @socket, addrinfo = @server.accept
+
+          @socket.should be_an_instance_of(Socket)
+          addrinfo.should be_an_instance_of(Addrinfo)
+        end
+
+        describe 'the returned Addrinfo' do
+          before do
+            @socket, @addr = @server.accept
+          end
+
+          it 'uses AF_INET as the address family' do
+            @addr.afamily.should == family
+          end
+
+          it 'uses PF_INET as the protocol family' do
+            @addr.pfamily.should == family
+          end
+
+          it 'uses SOCK_STREAM as the socket type' do
+            @addr.socktype.should == Socket::SOCK_STREAM
+          end
+
+          it 'uses 0 as the protocol' do
+            @addr.protocol.should == 0
+          end
+
+          it 'uses the same IP address as the client Socket' do
+            @addr.ip_address.should == @client.local_address.ip_address
+          end
+
+          it 'uses the same port as the client Socket' do
+            @addr.ip_port.should == @client.local_address.ip_port
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/bind_spec.rb b/spec/ruby/library/socket/socket/bind_spec.rb
index 09dbd624b5..338b19bbfc 100644
--- a/spec/ruby/library/socket/socket/bind_spec.rb
+++ b/spec/ruby/library/socket/socket/bind_spec.rb
@@ -1,11 +1,9 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
-include Socket::Constants
-
 describe "Socket#bind on SOCK_DGRAM socket" do
   before :each do
-    @sock = Socket.new(AF_INET, SOCK_DGRAM, 0)
+    @sock = Socket.new(Socket::AF_INET, Socket::SOCK_DGRAM, 0)
     @sockaddr = Socket.pack_sockaddr_in(0, "127.0.0.1")
   end
 
@@ -45,8 +43,8 @@ end
 
 describe "Socket#bind on SOCK_STREAM socket" do
   before :each do
-    @sock = Socket.new(AF_INET, SOCK_STREAM, 0)
-    @sock.setsockopt(SOL_SOCKET, SO_REUSEADDR, true)
+    @sock = Socket.new(Socket::AF_INET, Socket::SOCK_STREAM, 0)
+    @sock.setsockopt(Socket::SOL_SOCKET, Socket::SO_REUSEADDR, true)
     @sockaddr = Socket.pack_sockaddr_in(0, "127.0.0.1")
   end
 
@@ -83,3 +81,64 @@ describe "Socket#bind on SOCK_STREAM socket" do
     end
   end
 end
+
+describe 'Socket#bind' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    describe 'using a packed socket address' do
+      before do
+        @socket = Socket.new(family, :DGRAM)
+        @sockaddr = Socket.sockaddr_in(0, ip_address)
+      end
+
+      after do
+        @socket.close
+      end
+
+      it 'returns 0 when successfully bound' do
+        @socket.bind(@sockaddr).should == 0
+      end
+
+      it 'raises Errno::EINVAL when binding to an already bound port' do
+        @socket.bind(@sockaddr)
+
+        lambda { @socket.bind(@sockaddr) }.should raise_error(Errno::EINVAL)
+      end
+
+      it 'raises Errno::EADDRNOTAVAIL when the specified sockaddr is not available' do
+        ip = family == Socket::AF_INET ? '4.3.2.1' : '::2'
+        sockaddr1 = Socket.sockaddr_in(0, ip)
+
+        lambda { @socket.bind(sockaddr1) }.should raise_error(Errno::EADDRNOTAVAIL)
+      end
+
+      platform_is_not :windows do
+        it 'raises Errno::EACCES when the user is not allowed to bind to the port' do
+          sockaddr1 = Socket.pack_sockaddr_in(1, ip_address)
+
+          lambda { @socket.bind(sockaddr1); }.should raise_error(Errno::EACCES)
+        end
+      end
+    end
+
+    describe 'using an Addrinfo' do
+      before do
+        @addr   = Addrinfo.udp(ip_address, 0)
+        @socket = Socket.new(@addr.afamily, @addr.socktype)
+      end
+
+      after do
+        @socket.close
+      end
+
+      it 'binds to an Addrinfo' do
+        @socket.bind(@addr).should == 0
+        @socket.local_address.should be_an_instance_of(Addrinfo)
+      end
+
+      it 'uses a new Addrinfo for the local address' do
+        @socket.bind(@addr)
+        @socket.local_address.should_not == @addr
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/connect_nonblock_spec.rb b/spec/ruby/library/socket/socket/connect_nonblock_spec.rb
index caac24401c..21ef2b4a94 100644
--- a/spec/ruby/library/socket/socket/connect_nonblock_spec.rb
+++ b/spec/ruby/library/socket/socket/connect_nonblock_spec.rb
@@ -1,8 +1,6 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
-require 'socket'
-
 describe "Socket#connect_nonblock" do
   before :each do
     @hostname = "127.0.0.1"
@@ -69,3 +67,55 @@ describe "Socket#connect_nonblock" do
     end
   end
 end
+
+describe 'Socket#connect_nonblock' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    describe 'using a DGRAM socket' do
+      before do
+        @server   = Socket.new(family, :DGRAM)
+        @client   = Socket.new(family, :DGRAM)
+        @sockaddr = Socket.sockaddr_in(0, ip_address)
+
+        @server.bind(@sockaddr)
+      end
+
+      after do
+        @client.close
+        @server.close
+      end
+
+      it 'returns 0 when successfully connected using a String' do
+        @client.connect_nonblock(@server.getsockname).should == 0
+      end
+
+      it 'returns 0 when successfully connected using an Addrinfo' do
+        @client.connect_nonblock(@server.connect_address).should == 0
+      end
+
+      it 'raises TypeError when passed a Fixnum' do
+        lambda { @client.connect_nonblock(666) }.should raise_error(TypeError)
+      end
+    end
+
+    describe 'using a STREAM socket' do
+      before do
+        @server   = Socket.new(family, :STREAM)
+        @client   = Socket.new(family, :STREAM)
+        @sockaddr = Socket.sockaddr_in(0, ip_address)
+      end
+
+      after do
+        @client.close
+        @server.close
+      end
+
+      it 'raises IO:EINPROGRESSWaitWritable when the connection would block' do
+        @server.bind(@sockaddr)
+
+        lambda {
+          @client.connect_nonblock(@server.getsockname)
+        }.should raise_error(IO::EINPROGRESSWaitWritable)
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/connect_spec.rb b/spec/ruby/library/socket/socket/connect_spec.rb
index 1658a2b81f..1e2982bfde 100644
--- a/spec/ruby/library/socket/socket/connect_spec.rb
+++ b/spec/ruby/library/socket/socket/connect_spec.rb
@@ -1,2 +1,48 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
+
+describe 'Socket#connect' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before do
+      @server = Socket.new(family, :STREAM)
+      @client = Socket.new(family, :STREAM)
+
+      @server.bind(Socket.sockaddr_in(0, ip_address))
+    end
+
+    after do
+      @client.close
+      @server.close
+    end
+
+    it 'returns 0 when connected successfully using a String' do
+      @server.listen(1)
+
+      @client.connect(@server.getsockname).should == 0
+    end
+
+    it 'returns 0 when connected successfully using an Addrinfo' do
+      @server.listen(1)
+
+      @client.connect(@server.connect_address).should == 0
+    end
+
+    it 'raises Errno::EISCONN when already connected' do
+      @server.listen(1)
+
+      @client.connect(@server.getsockname).should == 0
+
+      lambda {
+        @client.connect(@server.getsockname)
+      }.should raise_error(Errno::EISCONN)
+    end
+
+    it 'raises Errno::ECONNREFUSED or Errno::ETIMEDOUT when the connection failed' do
+      begin
+        @client.connect(@server.getsockname)
+      rescue => e
+        [Errno::ECONNREFUSED, Errno::ETIMEDOUT].include?(e.class).should == true
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/for_fd_spec.rb b/spec/ruby/library/socket/socket/for_fd_spec.rb
index 6ea6d9cf83..e89228d436 100644
--- a/spec/ruby/library/socket/socket/for_fd_spec.rb
+++ b/spec/ruby/library/socket/socket/for_fd_spec.rb
@@ -1,6 +1,5 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
-require 'socket'
 
 describe "Socket.for_fd" do
   before :each do
diff --git a/spec/ruby/library/socket/socket/getaddrinfo_spec.rb b/spec/ruby/library/socket/socket/getaddrinfo_spec.rb
index 64183b38d0..bc6e9e8f9d 100644
--- a/spec/ruby/library/socket/socket/getaddrinfo_spec.rb
+++ b/spec/ruby/library/socket/socket/getaddrinfo_spec.rb
@@ -1,9 +1,7 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
-require 'socket'
-
-describe "Socket#getaddrinfo" do
+describe "Socket.getaddrinfo" do
   before :each do
     @do_not_reverse_lookup = BasicSocket.do_not_reverse_lookup
     BasicSocket.do_not_reverse_lookup = true
@@ -53,10 +51,10 @@ describe "Socket#getaddrinfo" do
       end
     end
 
-    # #getaddrinfo will return a INADDR_ANY address (0.0.0.0
-    # or "::") if it's a passive socket. In the case of non-passive
+    # #getaddrinfo will return a INADDR_ANY address (0.0.0.0 or "::")
+    # if it's a passive socket. In the case of non-passive
     # sockets (AI_PASSIVE not set) it should return the loopback
-    # address (127.0.0.1 or "::1".
+    # address (127.0.0.1 or "::1").
 
     it "accepts empty addresses for IPv4 passive sockets" do
       res = Socket.getaddrinfo(nil, "discard",
@@ -110,3 +108,270 @@ describe "Socket#getaddrinfo" do
     end
   end
 end
+
+describe 'Socket.getaddrinfo' do
+  describe 'without global reverse lookups' do
+    it 'returns an Array' do
+      Socket.getaddrinfo(nil, 'http').should be_an_instance_of(Array)
+    end
+
+    it 'accepts a Fixnum as the address family' do
+      array = Socket.getaddrinfo(nil, 'http', Socket::AF_INET)[0]
+
+      array[0].should == 'AF_INET'
+      array[1].should == 80
+      array[2].should == '127.0.0.1'
+      array[3].should == '127.0.0.1'
+      array[4].should == Socket::AF_INET
+      array[5].should be_an_instance_of(Fixnum)
+      array[6].should be_an_instance_of(Fixnum)
+    end
+
+    it 'accepts a Fixnum as the address family using IPv6' do
+      array = Socket.getaddrinfo(nil, 'http', Socket::AF_INET6)[0]
+
+      array[0].should == 'AF_INET6'
+      array[1].should == 80
+      array[2].should == '::1'
+      array[3].should == '::1'
+      array[4].should == Socket::AF_INET6
+      array[5].should be_an_instance_of(Fixnum)
+      array[6].should be_an_instance_of(Fixnum)
+    end
+
+    it 'accepts a Symbol as the address family' do
+      array = Socket.getaddrinfo(nil, 'http', :INET)[0]
+
+      array[0].should == 'AF_INET'
+      array[1].should == 80
+      array[2].should == '127.0.0.1'
+      array[3].should == '127.0.0.1'
+      array[4].should == Socket::AF_INET
+      array[5].should be_an_instance_of(Fixnum)
+      array[6].should be_an_instance_of(Fixnum)
+    end
+
+    it 'accepts a Symbol as the address family using IPv6' do
+      array = Socket.getaddrinfo(nil, 'http', :INET6)[0]
+
+      array[0].should == 'AF_INET6'
+      array[1].should == 80
+      array[2].should == '::1'
+      array[3].should == '::1'
+      array[4].should == Socket::AF_INET6
+      array[5].should be_an_instance_of(Fixnum)
+      array[6].should be_an_instance_of(Fixnum)
+    end
+
+    it 'accepts a String as the address family' do
+      array = Socket.getaddrinfo(nil, 'http', 'INET')[0]
+
+      array[0].should == 'AF_INET'
+      array[1].should == 80
+      array[2].should == '127.0.0.1'
+      array[3].should == '127.0.0.1'
+      array[4].should == Socket::AF_INET
+      array[5].should be_an_instance_of(Fixnum)
+      array[6].should be_an_instance_of(Fixnum)
+    end
+
+    it 'accepts a String as the address family using IPv6' do
+      array = Socket.getaddrinfo(nil, 'http', 'INET6')[0]
+
+      array[0].should == 'AF_INET6'
+      array[1].should == 80
+      array[2].should == '::1'
+      array[3].should == '::1'
+      array[4].should == Socket::AF_INET6
+      array[5].should be_an_instance_of(Fixnum)
+      array[6].should be_an_instance_of(Fixnum)
+    end
+
+    it 'accepts an object responding to #to_str as the host' do
+      dummy = mock(:dummy)
+
+      dummy.stub!(:to_str).and_return('127.0.0.1')
+
+      array = Socket.getaddrinfo(dummy, 'http')[0]
+
+      array[0].should == 'AF_INET'
+      array[1].should == 80
+      array[2].should == '127.0.0.1'
+      array[3].should == '127.0.0.1'
+      array[4].should == Socket::AF_INET
+      array[5].should be_an_instance_of(Fixnum)
+      array[6].should be_an_instance_of(Fixnum)
+    end
+
+    it 'accepts an object responding to #to_str as the address family' do
+      dummy = mock(:dummy)
+
+      dummy.stub!(:to_str).and_return('INET')
+
+      array = Socket.getaddrinfo(nil, 'http', dummy)[0]
+
+      array[0].should == 'AF_INET'
+      array[1].should == 80
+      array[2].should == '127.0.0.1'
+      array[3].should == '127.0.0.1'
+      array[4].should == Socket::AF_INET
+      array[5].should be_an_instance_of(Fixnum)
+      array[6].should be_an_instance_of(Fixnum)
+    end
+
+    ipproto_tcp = Socket::IPPROTO_TCP
+    platform_is :windows do
+      ipproto_tcp = 0
+    end
+
+    it 'accepts a Fixnum as the socket type' do
+      Socket.getaddrinfo(nil, 'http', :INET, Socket::SOCK_STREAM)[0].should == [
+        'AF_INET',
+        80,
+        '127.0.0.1',
+        '127.0.0.1',
+        Socket::AF_INET,
+        Socket::SOCK_STREAM,
+        ipproto_tcp
+      ]
+    end
+
+    it 'accepts a Symbol as the socket type' do
+      Socket.getaddrinfo(nil, 'http', :INET, :STREAM)[0].should == [
+        'AF_INET',
+        80,
+        '127.0.0.1',
+        '127.0.0.1',
+        Socket::AF_INET,
+        Socket::SOCK_STREAM,
+        ipproto_tcp
+      ]
+    end
+
+    it 'accepts a String as the socket type' do
+      Socket.getaddrinfo(nil, 'http', :INET, 'STREAM')[0].should == [
+        'AF_INET',
+        80,
+        '127.0.0.1',
+        '127.0.0.1',
+        Socket::AF_INET,
+        Socket::SOCK_STREAM,
+        ipproto_tcp
+      ]
+    end
+
+    it 'accepts an object responding to #to_str as the socket type' do
+      dummy = mock(:dummy)
+
+      dummy.stub!(:to_str).and_return('STREAM')
+
+      Socket.getaddrinfo(nil, 'http', :INET, dummy)[0].should == [
+        'AF_INET',
+        80,
+        '127.0.0.1',
+        '127.0.0.1',
+        Socket::AF_INET,
+        Socket::SOCK_STREAM,
+        ipproto_tcp
+      ]
+    end
+
+    platform_is_not :windows do
+      it 'accepts a Fixnum as the protocol family' do
+        addr = Socket.getaddrinfo(nil, 'http', :INET, :DGRAM, Socket::IPPROTO_UDP)
+
+        addr[0].should == [
+          'AF_INET',
+          80,
+          '127.0.0.1',
+          '127.0.0.1',
+          Socket::AF_INET,
+          Socket::SOCK_DGRAM,
+          Socket::IPPROTO_UDP
+        ]
+      end
+    end
+
+    it 'accepts a Fixnum as the flags' do
+      addr = Socket.getaddrinfo(nil, 'http', :INET, :STREAM,
+                                Socket::IPPROTO_TCP, Socket::AI_PASSIVE)
+
+      addr[0].should == [
+        'AF_INET',
+        80,
+        '0.0.0.0',
+        '0.0.0.0',
+        Socket::AF_INET,
+        Socket::SOCK_STREAM,
+        Socket::IPPROTO_TCP
+      ]
+    end
+
+    it 'performs a reverse lookup when the reverse_lookup argument is true' do
+      addr = Socket.getaddrinfo(nil, 'http', :INET, :STREAM,
+                                Socket::IPPROTO_TCP, 0, true)[0]
+
+      addr[0].should == 'AF_INET'
+      addr[1].should == 80
+
+      addr[2].should be_an_instance_of(String)
+      addr[2].should_not == addr[3]
+
+      addr[3].should == '127.0.0.1'
+    end
+
+    it 'performs a reverse lookup when the reverse_lookup argument is :hostname' do
+      addr = Socket.getaddrinfo(nil, 'http', :INET, :STREAM,
+                                Socket::IPPROTO_TCP, 0, :hostname)[0]
+
+      addr[0].should == 'AF_INET'
+      addr[1].should == 80
+
+      addr[2].should be_an_instance_of(String)
+      addr[2].should_not == addr[3]
+
+      addr[3].should == '127.0.0.1'
+    end
+
+    it 'performs a reverse lookup when the reverse_lookup argument is :numeric' do
+      addr = Socket.getaddrinfo(nil, 'http', :INET, :STREAM,
+                                Socket::IPPROTO_TCP, 0, :numeric)[0]
+
+      addr.should == [
+        'AF_INET',
+        80,
+        '127.0.0.1',
+        '127.0.0.1',
+        Socket::AF_INET,
+        Socket::SOCK_STREAM,
+        Socket::IPPROTO_TCP
+      ]
+    end
+  end
+
+  describe 'with global reverse lookups' do
+    before do
+      @do_not_reverse_lookup = BasicSocket.do_not_reverse_lookup
+      BasicSocket.do_not_reverse_lookup = false
+    end
+
+    after do
+      BasicSocket.do_not_reverse_lookup = @do_not_reverse_lookup
+    end
+
+    it 'returns an address honoring the global lookup option' do
+      addr = Socket.getaddrinfo(nil, 'http', :INET)[0]
+
+      addr[0].should == 'AF_INET'
+      addr[1].should == 80
+
+      # We don't have control over this value and there's no way to test this
+      # without relying on Socket.getaddrinfo()'s own behaviour (meaning this
+      # test would faily any way of the method was not implemented correctly).
+      addr[2].should be_an_instance_of(String)
+      addr[2].should_not == addr[3]
+
+      addr[3].should == '127.0.0.1'
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/gethostbyaddr_spec.rb b/spec/ruby/library/socket/socket/gethostbyaddr_spec.rb
index 1658a2b81f..cad6ed2dd0 100644
--- a/spec/ruby/library/socket/socket/gethostbyaddr_spec.rb
+++ b/spec/ruby/library/socket/socket/gethostbyaddr_spec.rb
@@ -1,2 +1,121 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
+require 'ipaddr'
+
+describe 'Socket.gethostbyaddr' do
+  describe 'using an IPv4 address' do
+    before do
+      @addr = IPAddr.new('127.0.0.1').hton
+    end
+
+    describe 'without an explicit address family' do
+      it 'returns an Array' do
+        Socket.gethostbyaddr(@addr).should be_an_instance_of(Array)
+      end
+
+      describe 'the returned Array' do
+        before do
+          @array = Socket.gethostbyaddr(@addr)
+        end
+
+        it 'includes the hostname as the first value' do
+          @array[0].should == SocketSpecs.hostname_reverse_lookup
+        end
+
+        it 'includes the aliases as the 2nd value' do
+          @array[1].should be_an_instance_of(Array)
+
+          @array[1].each do |val|
+            val.should be_an_instance_of(String)
+          end
+        end
+
+        it 'includes the address type as the 3rd value' do
+          @array[2].should == Socket::AF_INET
+        end
+
+        it 'includes all address strings as the remaining values' do
+          @array[3].should == @addr
+
+          @array[4..-1].each do |val|
+            val.should be_an_instance_of(String)
+          end
+        end
+      end
+    end
+
+    describe 'with an explicit address family' do
+      it 'returns an Array when using a Fixnum as the address family' do
+        Socket.gethostbyaddr(@addr, Socket::AF_INET).should be_an_instance_of(Array)
+      end
+
+      it 'returns an Array when using a Symbol as the address family' do
+        Socket.gethostbyaddr(@addr, :INET).should be_an_instance_of(Array)
+      end
+
+      it 'raises SocketError when the address is not supported by the family' do
+        lambda { Socket.gethostbyaddr(@addr, :INET6) }.should raise_error(SocketError)
+      end
+    end
+  end
+
+  guard -> { SocketSpecs.ipv6_available? } do
+    describe 'using an IPv6 address' do
+      before do
+        @addr = IPAddr.new('::1').hton
+      end
+
+      describe 'without an explicit address family' do
+        it 'returns an Array' do
+          Socket.gethostbyaddr(@addr).should be_an_instance_of(Array)
+        end
+
+        describe 'the returned Array' do
+          before do
+            @array = Socket.gethostbyaddr(@addr)
+          end
+
+          it 'includes the hostname as the first value' do
+            @array[0].should == SocketSpecs.hostname_reverse_lookup("::1")
+          end
+
+          it 'includes the aliases as the 2nd value' do
+            @array[1].should be_an_instance_of(Array)
+
+            @array[1].each do |val|
+              val.should be_an_instance_of(String)
+            end
+          end
+
+          it 'includes the address type as the 3rd value' do
+            @array[2].should == Socket::AF_INET6
+          end
+
+          it 'includes all address strings as the remaining values' do
+            @array[3].should be_an_instance_of(String)
+
+            @array[4..-1].each do |val|
+              val.should be_an_instance_of(String)
+            end
+          end
+        end
+      end
+
+      describe 'with an explicit address family' do
+        it 'returns an Array when using a Fixnum as the address family' do
+          Socket.gethostbyaddr(@addr, Socket::AF_INET6).should be_an_instance_of(Array)
+        end
+
+        it 'returns an Array when using a Symbol as the address family' do
+          Socket.gethostbyaddr(@addr, :INET6).should be_an_instance_of(Array)
+        end
+
+        platform_is_not :windows do
+          it 'raises SocketError when the address is not supported by the family' do
+            lambda { Socket.gethostbyaddr(@addr, :INET) }.should raise_error(SocketError)
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/gethostbyname_spec.rb b/spec/ruby/library/socket/socket/gethostbyname_spec.rb
index 23880bb42d..9367030e25 100644
--- a/spec/ruby/library/socket/socket/gethostbyname_spec.rb
+++ b/spec/ruby/library/socket/socket/gethostbyname_spec.rb
@@ -1,9 +1,7 @@
 # -*- encoding: binary -*-
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
-require 'socket'
-
 describe "Socket#gethostbyname" do
   it "returns broadcast address info for '<broadcast>'" do
     addr = Socket.gethostbyname('<broadcast>');
@@ -15,3 +13,123 @@ describe "Socket#gethostbyname" do
     addr.should == ["0.0.0.0", [], 2, "\000\000\000\000"]
   end
 end
+
+describe 'Socket.gethostbyname' do
+  it 'returns an Array' do
+    Socket.gethostbyname('127.0.0.1').should be_an_instance_of(Array)
+  end
+
+  describe 'the returned Array' do
+    before do
+      @array = Socket.gethostbyname('127.0.0.1')
+    end
+
+    it 'includes the hostname as the first value' do
+      @array[0].should == '127.0.0.1'
+    end
+
+    it 'includes the aliases as the 2nd value' do
+      @array[1].should be_an_instance_of(Array)
+
+      @array[1].each do |val|
+        val.should be_an_instance_of(String)
+      end
+    end
+
+    it 'includes the address type as the 3rd value' do
+      possible = [Socket::AF_INET, Socket::AF_INET6]
+
+      possible.include?(@array[2]).should == true
+    end
+
+    it 'includes the address strings as the remaining values' do
+      @array[3].should be_an_instance_of(String)
+
+      @array[4..-1].each do |val|
+        val.should be_an_instance_of(String)
+      end
+    end
+  end
+
+  describe 'using <broadcast> as the input address' do
+    describe 'the returned Array' do
+      before do
+        @addr = Socket.gethostbyname('<broadcast>')
+      end
+
+      it 'includes the broadcast address as the first value' do
+        @addr[0].should == '255.255.255.255'
+      end
+
+      it 'includes the address type as the 3rd value' do
+        @addr[2].should == Socket::AF_INET
+      end
+
+      it 'includes the address string as the 4th value' do
+        @addr[3].should == [255, 255, 255, 255].pack('C4')
+      end
+    end
+  end
+
+  describe 'using <any> as the input address' do
+    describe 'the returned Array' do
+      before do
+        @addr = Socket.gethostbyname('<any>')
+      end
+
+      it 'includes the wildcard address as the first value' do
+        @addr[0].should == '0.0.0.0'
+      end
+
+      it 'includes the address type as the 3rd value' do
+        @addr[2].should == Socket::AF_INET
+      end
+
+      it 'includes the address string as the 4th value' do
+        @addr[3].should == [0, 0, 0, 0].pack('C4')
+      end
+    end
+  end
+
+  describe 'using an IPv4 address' do
+    describe 'the returned Array' do
+      before do
+        @addr = Socket.gethostbyname('127.0.0.1')
+      end
+
+      it 'includes the IP address as the first value' do
+        @addr[0].should == '127.0.0.1'
+      end
+
+      it 'includes the address type as the 3rd value' do
+        @addr[2].should == Socket::AF_INET
+      end
+
+      it 'includes the address string as the 4th value' do
+        @addr[3].should == [127, 0, 0, 1].pack('C4')
+      end
+    end
+  end
+
+  guard -> { SocketSpecs.ipv6_available? } do
+    describe 'using an IPv6 address' do
+      describe 'the returned Array' do
+        before do
+          @addr = Socket.gethostbyname('::1')
+        end
+
+        it 'includes the IP address as the first value' do
+          @addr[0].should == '::1'
+        end
+
+        it 'includes the address type as the 3rd value' do
+          @addr[2].should == Socket::AF_INET6
+        end
+
+        it 'includes the address string as the 4th value' do
+          @addr[3].should == [0, 0, 0, 0, 0, 0, 0, 1].pack('n8')
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/gethostname_spec.rb b/spec/ruby/library/socket/socket/gethostname_spec.rb
index 7308d8294b..4b79747b27 100644
--- a/spec/ruby/library/socket/socket/gethostname_spec.rb
+++ b/spec/ruby/library/socket/socket/gethostname_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "Socket.gethostname" do
diff --git a/spec/ruby/library/socket/socket/getifaddrs_spec.rb b/spec/ruby/library/socket/socket/getifaddrs_spec.rb
new file mode 100644
index 0000000000..1a767c56ab
--- /dev/null
+++ b/spec/ruby/library/socket/socket/getifaddrs_spec.rb
@@ -0,0 +1,108 @@
+require_relative '../spec_helper'
+
+describe 'Socket.getifaddrs' do
+  before do
+    @ifaddrs = Socket.getifaddrs
+  end
+
+  it 'returns an Array' do
+    @ifaddrs.should be_an_instance_of(Array)
+  end
+
+  describe 'the returned Array' do
+    it 'should not be empty' do
+      @ifaddrs.should_not be_empty
+    end
+
+    it 'contains instances of Socket::Ifaddr' do
+      @ifaddrs.each do |ifaddr|
+        ifaddr.should be_an_instance_of(Socket::Ifaddr)
+      end
+    end
+  end
+
+  describe 'each returned Socket::Ifaddr' do
+    it 'has an interface index' do
+      @ifaddrs.each do |ifaddr|
+        ifaddr.ifindex.should be_an_instance_of(Fixnum)
+      end
+    end
+
+    it 'has an interface name' do
+      @ifaddrs.each do |ifaddr|
+        ifaddr.name.should be_an_instance_of(String)
+      end
+    end
+
+    it 'has a set of flags' do
+      @ifaddrs.each do |ifaddr|
+        ifaddr.flags.should be_an_instance_of(Fixnum)
+      end
+    end
+  end
+
+  describe 'the Socket::Ifaddr address' do
+    before do
+      @addrs = @ifaddrs.map(&:addr).compact
+    end
+
+    it 'is an Addrinfo' do
+      @addrs.each do |addr|
+        addr.should be_an_instance_of(Addrinfo)
+      end
+    end
+
+    it 'has an address family' do
+      @addrs.each do |addr|
+        addr.afamily.should be_an_instance_of(Fixnum)
+        addr.afamily.should_not == Socket::AF_UNSPEC
+      end
+    end
+  end
+
+    platform_is_not :windows do
+    describe 'the Socket::Ifaddr broadcast address' do
+      before do
+        @addrs = @ifaddrs.map(&:broadaddr).compact
+      end
+
+      it 'is an Addrinfo' do
+        @addrs.each do |addr|
+          addr.should be_an_instance_of(Addrinfo)
+        end
+      end
+
+      it 'has an address family' do
+        @addrs.each do |addr|
+          addr.afamily.should be_an_instance_of(Fixnum)
+          addr.afamily.should_not == Socket::AF_UNSPEC
+        end
+      end
+    end
+
+    describe 'the Socket::Ifaddr netmask address' do
+      before do
+        @addrs = @ifaddrs.map(&:netmask).compact
+      end
+
+      it 'is an Addrinfo' do
+        @addrs.each do |addr|
+          addr.should be_an_instance_of(Addrinfo)
+        end
+      end
+
+      it 'has an address family' do
+        @addrs.each do |addr|
+          addr.afamily.should be_an_instance_of(Fixnum)
+          addr.afamily.should_not == Socket::AF_UNSPEC
+        end
+      end
+
+      it 'has an IP address' do
+        @addrs.each do |addr|
+          addr.ip_address.should be_an_instance_of(String)
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/getnameinfo_spec.rb b/spec/ruby/library/socket/socket/getnameinfo_spec.rb
index da6d5a46e5..394a90cb47 100644
--- a/spec/ruby/library/socket/socket/getnameinfo_spec.rb
+++ b/spec/ruby/library/socket/socket/getnameinfo_spec.rb
@@ -1,8 +1,6 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
-require 'socket'
-
 describe "Socket.getnameinfo" do
   before :each do
     @reverse_lookup = BasicSocket.do_not_reverse_lookup
@@ -62,5 +60,95 @@ describe "Socket.getnameinfo" do
     name_info = Socket.getnameinfo ["AF_INET", 9, 'foo', '127.0.0.1']
     name_info[1].should == 'discard'
   end
+end
+
+describe 'Socket.getnameinfo' do
+  describe 'using a String as the first argument' do
+    before do
+      @addr = Socket.sockaddr_in(80, '127.0.0.1')
+    end
+
+    it 'raises SocketError when using an invalid String' do
+      lambda { Socket.getnameinfo('cats') }.should raise_error(SocketError)
+    end
+
+    describe 'without custom flags' do
+      it 'returns an Array containing the hostname and service name' do
+        Socket.getnameinfo(@addr).should == [SocketSpecs.hostname_reverse_lookup, 'http']
+      end
+    end
+
+    describe 'using NI_NUMERICHOST as the flag' do
+      it 'returns an Array containing the numeric hostname and service name' do
+        array = Socket.getnameinfo(@addr, Socket::NI_NUMERICHOST)
+
+        %w{127.0.0.1 ::1}.include?(array[0]).should == true
+
+        array[1].should == 'http'
+      end
+    end
+  end
+
+  SocketSpecs.each_ip_protocol do |family, ip_address, family_name|
+    before do
+      @hostname = SocketSpecs.hostname_reverse_lookup(ip_address)
+    end
 
+    describe 'using a 3 element Array as the first argument' do
+      before do
+        @addr = [family_name, 80, @hostname]
+      end
+
+      it 'raises ArgumentError when using an invalid Array' do
+        lambda { Socket.getnameinfo([family_name]) }.should raise_error(ArgumentError)
+      end
+
+      describe 'without custom flags' do
+        it 'returns an Array containing the hostname and service name' do
+          array = Socket.getnameinfo(@addr)
+          array.should be_an_instance_of(Array)
+          array[0].should include(@hostname)
+          array[1].should == 'http'
+        end
+      end
+
+      platform_is_not :windows do
+        describe 'using NI_NUMERICHOST as the flag' do
+          it 'returns an Array containing the numeric hostname and service name' do
+            Socket.getnameinfo(@addr, Socket::NI_NUMERICHOST).should == [ip_address, 'http']
+          end
+        end
+      end
+    end
+
+    describe 'using a 4 element Array as the first argument' do
+      before do
+        @addr = [family_name, 80, ip_address, ip_address]
+      end
+
+      describe 'without custom flags' do
+        it 'returns an Array containing the hostname and service name' do
+          array = Socket.getnameinfo(@addr)
+          array.should be_an_instance_of(Array)
+          array[0].should == @hostname
+          array[1].should == 'http'
+        end
+
+        it 'uses the 3rd value as the hostname if the 4th is not present' do
+          addr = [family_name, 80, ip_address, nil]
+
+          array = Socket.getnameinfo(addr)
+          array.should be_an_instance_of(Array)
+          array[0].should == @hostname
+          array[1].should == 'http'
+        end
+      end
+
+      describe 'using NI_NUMERICHOST as the flag' do
+        it 'returns an Array containing the numeric hostname and service name' do
+          Socket.getnameinfo(@addr, Socket::NI_NUMERICHOST).should == [ip_address, 'http']
+        end
+      end
+    end
+  end
 end
diff --git a/spec/ruby/library/socket/socket/getservbyname_spec.rb b/spec/ruby/library/socket/socket/getservbyname_spec.rb
index dd05de90b6..d80e948a1b 100644
--- a/spec/ruby/library/socket/socket/getservbyname_spec.rb
+++ b/spec/ruby/library/socket/socket/getservbyname_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "Socket#getservbyname" do
@@ -10,6 +10,14 @@ describe "Socket#getservbyname" do
     Socket.getservbyname('discard', 'tcp').should == 9
   end
 
+  it 'returns the port for service "http"' do
+    Socket.getservbyname('http').should == 80
+  end
+
+  it 'returns the port for service "http" with protocol "tcp"' do
+    Socket.getservbyname('http', 'tcp').should == 80
+  end
+
   it "returns the port for service 'domain' with protocol 'udp'" do
     Socket.getservbyname('domain', 'udp').should == 53
   end
diff --git a/spec/ruby/library/socket/socket/getservbyport_spec.rb b/spec/ruby/library/socket/socket/getservbyport_spec.rb
new file mode 100644
index 0000000000..9be2ac527e
--- /dev/null
+++ b/spec/ruby/library/socket/socket/getservbyport_spec.rb
@@ -0,0 +1,23 @@
+require_relative '../spec_helper'
+
+describe 'Socket.getservbyport' do
+  platform_is_not :windows do
+    it 'returns the service name as a String' do
+      Socket.getservbyport(514).should == 'shell'
+    end
+  end
+
+  platform_is :windows do
+    it 'returns the service name as a String' do
+      Socket.getservbyport(514).should == 'cmd'
+    end
+  end
+
+  it 'returns the service name when using a custom protocol name' do
+    Socket.getservbyport(514, 'udp').should == 'syslog'
+  end
+
+  it 'raises SocketError for an unknown port number' do
+    lambda { Socket.getservbyport(0) }.should raise_error(SocketError)
+  end
+end
diff --git a/spec/ruby/library/socket/socket/initialize_spec.rb b/spec/ruby/library/socket/socket/initialize_spec.rb
new file mode 100644
index 0000000000..375eabfbcb
--- /dev/null
+++ b/spec/ruby/library/socket/socket/initialize_spec.rb
@@ -0,0 +1,87 @@
+require_relative '../spec_helper'
+
+describe 'Socket#initialize' do
+  before do
+    @socket = nil
+  end
+
+  after do
+    @socket.close if @socket
+  end
+
+  describe 'using a Fixnum as the 1st and 2nd arguments' do
+    it 'returns a Socket' do
+      @socket = Socket.new(Socket::AF_INET, Socket::SOCK_STREAM)
+
+      @socket.should be_an_instance_of(Socket)
+    end
+  end
+
+  describe 'using Symbols as the 1st and 2nd arguments' do
+    it 'returns a Socket' do
+      @socket = Socket.new(:INET, :STREAM)
+
+      @socket.should be_an_instance_of(Socket)
+    end
+  end
+
+  describe 'using Strings as the 1st and 2nd arguments' do
+    it 'returns a Socket' do
+      @socket = Socket.new('INET', 'STREAM')
+
+      @socket.should be_an_instance_of(Socket)
+    end
+  end
+
+  describe 'using objects that respond to #to_str' do
+    it 'returns a Socket' do
+      family = mock(:family)
+      type   = mock(:type)
+
+      family.stub!(:to_str).and_return('AF_INET')
+      type.stub!(:to_str).and_return('STREAM')
+
+      @socket = Socket.new(family, type)
+
+      @socket.should be_an_instance_of(Socket)
+    end
+
+    it 'raises TypeError when the #to_str method does not return a String' do
+      family = mock(:family)
+      type   = mock(:type)
+
+      family.stub!(:to_str).and_return(Socket::AF_INET)
+      type.stub!(:to_str).and_return(Socket::SOCK_STREAM)
+
+      lambda { Socket.new(family, type) }.should raise_error(TypeError)
+    end
+  end
+
+  describe 'using a custom protocol' do
+    it 'returns a Socket when using a Fixnum' do
+      @socket = Socket.new(:INET, :STREAM, Socket::IPPROTO_TCP)
+
+      @socket.should be_an_instance_of(Socket)
+    end
+
+    it 'raises TypeError when using a Symbol' do
+      lambda { Socket.new(:INET, :STREAM, :TCP) }.should raise_error(TypeError)
+    end
+  end
+
+  it 'sets the do_not_reverse_lookup option' do
+    @socket = Socket.new(:INET, :STREAM)
+
+    @socket.do_not_reverse_lookup.should == Socket.do_not_reverse_lookup
+  end
+
+  it "sets basic IO accessors" do
+    @socket = Socket.new(:INET, :STREAM)
+    @socket.lineno.should == 0
+  end
+
+  it "sets the socket to binary mode" do
+    @socket = Socket.new(:INET, :STREAM)
+    @socket.binmode?.should be_true
+  end
+end
diff --git a/spec/ruby/library/socket/socket/ip_address_list_spec.rb b/spec/ruby/library/socket/socket/ip_address_list_spec.rb
new file mode 100644
index 0000000000..f97c2d7f85
--- /dev/null
+++ b/spec/ruby/library/socket/socket/ip_address_list_spec.rb
@@ -0,0 +1,50 @@
+require_relative '../spec_helper'
+
+describe 'Socket.ip_address_list' do
+  it 'returns an Array' do
+    Socket.ip_address_list.should be_an_instance_of(Array)
+  end
+
+  describe 'the returned Array' do
+    before do
+      @array = Socket.ip_address_list
+    end
+
+    it 'is not empty' do
+      @array.should_not be_empty
+    end
+
+    it 'contains Addrinfo objects' do
+      @array.each do |klass|
+        klass.should be_an_instance_of(Addrinfo)
+      end
+    end
+  end
+
+  describe 'each returned Addrinfo' do
+    before do
+      @array = Socket.ip_address_list
+    end
+
+    it 'has a non-empty IP address' do
+      @array.each do |addr|
+        addr.ip_address.should be_an_instance_of(String)
+        addr.ip_address.should_not be_empty
+      end
+    end
+
+    it 'has an address family' do
+      families = [Socket::AF_INET, Socket::AF_INET6]
+
+      @array.each do |addr|
+        families.include?(addr.afamily).should == true
+      end
+    end
+
+    it 'uses 0 as the port number' do
+      @array.each do |addr|
+        addr.ip_port.should == 0
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/ipv6only_bang_spec.rb b/spec/ruby/library/socket/socket/ipv6only_bang_spec.rb
new file mode 100644
index 0000000000..73f3ce1642
--- /dev/null
+++ b/spec/ruby/library/socket/socket/ipv6only_bang_spec.rb
@@ -0,0 +1,17 @@
+require_relative '../spec_helper'
+
+describe 'Socket#ipv6only!' do
+  before do
+    @socket = Socket.new(:INET6, :DGRAM)
+  end
+
+  after do
+    @socket.close
+  end
+
+  it 'enables IPv6 only mode' do
+    @socket.ipv6only!
+
+    @socket.getsockopt(:IPV6, :V6ONLY).bool.should == true
+  end
+end
diff --git a/spec/ruby/library/socket/socket/listen_spec.rb b/spec/ruby/library/socket/socket/listen_spec.rb
index 3ef503ec2e..326307f942 100644
--- a/spec/ruby/library/socket/socket/listen_spec.rb
+++ b/spec/ruby/library/socket/socket/listen_spec.rb
@@ -1,11 +1,9 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
-include Socket::Constants
-
 describe "Socket#listen" do
   before :each do
-    @socket = Socket.new(AF_INET, SOCK_STREAM, 0)
+    @socket = Socket.new(Socket::AF_INET, Socket::SOCK_STREAM, 0)
   end
 
   after :each do
@@ -20,3 +18,47 @@ describe "Socket#listen" do
     @socket.listen(1).should == 0
   end
 end
+
+describe 'Socket#listen' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    describe 'using a DGRAM socket' do
+      before do
+        @server = Socket.new(family, :DGRAM)
+        @client = Socket.new(family, :DGRAM)
+
+        @server.bind(Socket.sockaddr_in(0, ip_address))
+      end
+
+      after do
+        @client.close
+        @server.close
+      end
+
+      it 'raises Errno::EOPNOTSUPP' do
+        lambda { @server.listen(1) }.should raise_error(Errno::EOPNOTSUPP)
+      end
+    end
+
+    describe 'using a STREAM socket' do
+      before do
+        @server = Socket.new(family, :STREAM)
+        @client = Socket.new(family, :STREAM)
+
+        @server.bind(Socket.sockaddr_in(0, ip_address))
+      end
+
+      after do
+        @client.close
+        @server.close
+      end
+
+      it 'returns 0' do
+        @server.listen(1).should == 0
+      end
+
+      it "raises when the given argument can't be coerced to a Fixnum" do
+        lambda { @server.listen('cats') }.should raise_error(TypeError)
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/local_address_spec.rb b/spec/ruby/library/socket/socket/local_address_spec.rb
new file mode 100644
index 0000000000..3687f93a0c
--- /dev/null
+++ b/spec/ruby/library/socket/socket/local_address_spec.rb
@@ -0,0 +1,43 @@
+require_relative '../spec_helper'
+
+describe 'Socket#local_address' do
+  before do
+    @sock = Socket.new(Socket::AF_INET, Socket::SOCK_STREAM, Socket::IPPROTO_TCP)
+  end
+
+  after do
+    @sock.close
+  end
+
+  it 'returns an Addrinfo' do
+    @sock.local_address.should be_an_instance_of(Addrinfo)
+  end
+
+  describe 'the returned Addrinfo' do
+    it 'uses AF_INET as the address family' do
+      @sock.local_address.afamily.should == Socket::AF_INET
+    end
+
+    it 'uses PF_INET as the protocol family' do
+      @sock.local_address.pfamily.should == Socket::PF_INET
+    end
+
+    it 'uses SOCK_STREAM as the socket type' do
+      @sock.local_address.socktype.should == Socket::SOCK_STREAM
+    end
+
+    it 'uses 0.0.0.0 as the IP address' do
+      @sock.local_address.ip_address.should == '0.0.0.0'
+    end
+
+    platform_is_not :windows do
+      it 'uses 0 as the port' do
+        @sock.local_address.ip_port.should == 0
+      end
+    end
+
+    it 'uses 0 as the protocol' do
+      @sock.local_address.protocol.should == 0
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/new_spec.rb b/spec/ruby/library/socket/socket/new_spec.rb
index 1658a2b81f..b2ec607f6a 100644
--- a/spec/ruby/library/socket/socket/new_spec.rb
+++ b/spec/ruby/library/socket/socket/new_spec.rb
@@ -1,2 +1,2 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
diff --git a/spec/ruby/library/socket/socket/pack_sockaddr_in_spec.rb b/spec/ruby/library/socket/socket/pack_sockaddr_in_spec.rb
index a8f1f924d8..63d4724453 100644
--- a/spec/ruby/library/socket/socket/pack_sockaddr_in_spec.rb
+++ b/spec/ruby/library/socket/socket/pack_sockaddr_in_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 require_relative '../shared/pack_sockaddr'
 
diff --git a/spec/ruby/library/socket/socket/pack_sockaddr_un_spec.rb b/spec/ruby/library/socket/socket/pack_sockaddr_un_spec.rb
index 16a286cf6a..1ee0bc6157 100644
--- a/spec/ruby/library/socket/socket/pack_sockaddr_un_spec.rb
+++ b/spec/ruby/library/socket/socket/pack_sockaddr_un_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 require_relative '../shared/pack_sockaddr'
 
diff --git a/spec/ruby/library/socket/socket/pair_spec.rb b/spec/ruby/library/socket/socket/pair_spec.rb
index db11e5d92b..292eacd38d 100644
--- a/spec/ruby/library/socket/socket/pair_spec.rb
+++ b/spec/ruby/library/socket/socket/pair_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 require_relative '../shared/socketpair'
 
diff --git a/spec/ruby/library/socket/socket/recvfrom_nonblock_spec.rb b/spec/ruby/library/socket/socket/recvfrom_nonblock_spec.rb
index 1658a2b81f..76a07e3bfb 100644
--- a/spec/ruby/library/socket/socket/recvfrom_nonblock_spec.rb
+++ b/spec/ruby/library/socket/socket/recvfrom_nonblock_spec.rb
@@ -1,2 +1,110 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
+
+describe 'Socket#recvfrom_nonblock' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before do
+      @server = Socket.new(family, :DGRAM)
+      @client = Socket.new(family, :DGRAM)
+    end
+
+    after do
+      @client.close
+      @server.close
+    end
+
+    platform_is_not :windows do
+      describe 'using an unbound socket' do
+        it 'raises IO::WaitReadable' do
+          lambda { @server.recvfrom_nonblock(1) }.should raise_error(IO::WaitReadable)
+        end
+      end
+    end
+
+    describe 'using a bound socket' do
+      before do
+        @server.bind(Socket.sockaddr_in(0, ip_address))
+        @client.connect(@server.getsockname)
+      end
+
+      describe 'without any data available' do
+        it 'raises IO::WaitReadable' do
+          lambda { @server.recvfrom_nonblock(1) }.should raise_error(IO::WaitReadable)
+        end
+      end
+
+      describe 'with data available' do
+        before do
+          @client.write('hello')
+        end
+
+        platform_is_not :windows do
+          it 'returns an Array containing the data and an Addrinfo' do
+            ret = @server.recvfrom_nonblock(1)
+
+            ret.should be_an_instance_of(Array)
+            ret.length.should == 2
+          end
+        end
+
+        describe 'the returned data' do
+          it 'is the same as the sent data' do
+            5.times do
+              @client.write('hello')
+
+              msg, _ = @server.recvfrom_nonblock(5)
+
+              msg.should == 'hello'
+            end
+          end
+        end
+
+        platform_is_not :windows do
+          describe 'the returned Array' do
+            before do
+              @array = @server.recvfrom_nonblock(1)
+            end
+
+            it 'contains the data at index 0' do
+              @array[0].should == 'h'
+            end
+
+            it 'contains an Addrinfo at index 1' do
+              @array[1].should be_an_instance_of(Addrinfo)
+            end
+          end
+
+          describe 'the returned Addrinfo' do
+            before do
+              @addr = @server.recvfrom_nonblock(1)[1]
+            end
+
+            it 'uses AF_INET as the address family' do
+              @addr.afamily.should == family
+            end
+
+            it 'uses SOCK_DGRAM as the socket type' do
+              @addr.socktype.should == Socket::SOCK_DGRAM
+            end
+
+            it 'uses PF_INET as the protocol family' do
+              @addr.pfamily.should == family
+            end
+
+            it 'uses 0 as the protocol' do
+              @addr.protocol.should == 0
+            end
+
+            it 'uses the IP address of the client' do
+              @addr.ip_address.should == ip_address
+            end
+
+            it 'uses the port of the client' do
+              @addr.ip_port.should == @client.local_address.ip_port
+            end
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/recvfrom_spec.rb b/spec/ruby/library/socket/socket/recvfrom_spec.rb
index 1658a2b81f..7f0714511c 100644
--- a/spec/ruby/library/socket/socket/recvfrom_spec.rb
+++ b/spec/ruby/library/socket/socket/recvfrom_spec.rb
@@ -1,2 +1,92 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
+
+describe 'Socket#recvfrom' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before do
+      @server = Socket.new(family, :DGRAM)
+      @client = Socket.new(family, :DGRAM)
+    end
+
+    after do
+      @client.close
+      @server.close
+    end
+
+    describe 'using an unbound socket' do
+      it 'blocks the caller' do
+        lambda { @server.recvfrom(1) }.should block_caller
+      end
+    end
+
+    describe 'using a bound socket' do
+      before do
+        @server.bind(Socket.sockaddr_in(0, ip_address))
+        @client.connect(@server.getsockname)
+      end
+
+      describe 'without any data available' do
+        it 'blocks the caller' do
+          lambda { @server.recvfrom(1) }.should block_caller
+        end
+      end
+
+      describe 'with data available' do
+        before do
+          @client.write('hello')
+        end
+
+        it 'returns an Array containing the data and an Addrinfo' do
+          ret = @server.recvfrom(1)
+
+          ret.should be_an_instance_of(Array)
+          ret.length.should == 2
+        end
+
+        describe 'the returned Array' do
+          before do
+            @array = @server.recvfrom(1)
+          end
+
+          it 'contains the data at index 0' do
+            @array[0].should == 'h'
+          end
+
+          it 'contains an Addrinfo at index 1' do
+            @array[1].should be_an_instance_of(Addrinfo)
+          end
+        end
+
+        describe 'the returned Addrinfo' do
+          before do
+            @addr = @server.recvfrom(1)[1]
+          end
+
+          it 'uses AF_INET as the address family' do
+            @addr.afamily.should == family
+          end
+
+          it 'uses SOCK_DGRAM as the socket type' do
+            @addr.socktype.should == Socket::SOCK_DGRAM
+          end
+
+          it 'uses PF_INET as the protocol family' do
+            @addr.pfamily.should == family
+          end
+
+          it 'uses 0 as the protocol' do
+            @addr.protocol.should == 0
+          end
+
+          it 'uses the IP address of the client' do
+            @addr.ip_address.should == ip_address
+          end
+
+          it 'uses the port of the client' do
+            @addr.ip_port.should == @client.local_address.ip_port
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/remote_address_spec.rb b/spec/ruby/library/socket/socket/remote_address_spec.rb
new file mode 100644
index 0000000000..24d60d7f58
--- /dev/null
+++ b/spec/ruby/library/socket/socket/remote_address_spec.rb
@@ -0,0 +1,54 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+describe 'Socket#remote_address' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before do
+      @server = Socket.new(family, :STREAM)
+
+      @server.bind(Socket.sockaddr_in(0, ip_address))
+      @server.listen(1)
+
+      @host   = @server.local_address.ip_address
+      @port   = @server.local_address.ip_port
+      @client = Socket.new(family, :STREAM, Socket::IPPROTO_TCP)
+
+      @client.connect(Socket.sockaddr_in(@port, @host))
+    end
+
+    after do
+      @client.close
+      @server.close
+    end
+
+    it 'returns an Addrinfo' do
+      @client.remote_address.should be_an_instance_of(Addrinfo)
+    end
+
+    describe 'the returned Addrinfo' do
+      it 'uses AF_INET as the address family' do
+        @client.remote_address.afamily.should == family
+      end
+
+      it 'uses PF_INET as the protocol family' do
+        @client.remote_address.pfamily.should == family
+      end
+
+      it 'uses SOCK_STREAM as the socket type' do
+        @client.remote_address.socktype.should == Socket::SOCK_STREAM
+      end
+
+      it 'uses the correct IP address' do
+        @client.remote_address.ip_address.should == @host
+      end
+
+      it 'uses the correct port' do
+        @client.remote_address.ip_port.should == @port
+      end
+
+      it 'uses 0 as the protocol' do
+        @client.remote_address.protocol.should == 0
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/sockaddr_in_spec.rb b/spec/ruby/library/socket/socket/sockaddr_in_spec.rb
index 64645f179d..8ee956ac26 100644
--- a/spec/ruby/library/socket/socket/sockaddr_in_spec.rb
+++ b/spec/ruby/library/socket/socket/sockaddr_in_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 require_relative '../shared/pack_sockaddr'
 
diff --git a/spec/ruby/library/socket/socket/sockaddr_un_spec.rb b/spec/ruby/library/socket/socket/sockaddr_un_spec.rb
index b8f148ca13..8922ff4d6d 100644
--- a/spec/ruby/library/socket/socket/sockaddr_un_spec.rb
+++ b/spec/ruby/library/socket/socket/sockaddr_un_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 require_relative '../shared/pack_sockaddr'
 
diff --git a/spec/ruby/library/socket/socket/socket_spec.rb b/spec/ruby/library/socket/socket/socket_spec.rb
index ee003f84ec..5a3d6733e0 100644
--- a/spec/ruby/library/socket/socket/socket_spec.rb
+++ b/spec/ruby/library/socket/socket/socket_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "Socket" do
diff --git a/spec/ruby/library/socket/socket/socketpair_spec.rb b/spec/ruby/library/socket/socket/socketpair_spec.rb
index 495585e8dc..5b8311124e 100644
--- a/spec/ruby/library/socket/socket/socketpair_spec.rb
+++ b/spec/ruby/library/socket/socket/socketpair_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 require_relative '../shared/socketpair'
 
diff --git a/spec/ruby/library/socket/socket/sysaccept_spec.rb b/spec/ruby/library/socket/socket/sysaccept_spec.rb
index 1658a2b81f..17b1a8a2f0 100644
--- a/spec/ruby/library/socket/socket/sysaccept_spec.rb
+++ b/spec/ruby/library/socket/socket/sysaccept_spec.rb
@@ -1,2 +1,93 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
+
+describe 'Socket#sysaccept' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before do
+      @server   = Socket.new(family, :STREAM)
+      @sockaddr = Socket.sockaddr_in(0, ip_address)
+    end
+
+    after do
+      @server.close
+    end
+
+    platform_is_not :windows do # hangs
+      describe 'using an unbound socket'  do
+        it 'raises Errno::EINVAL' do
+          lambda { @server.sysaccept }.should raise_error(Errno::EINVAL)
+        end
+      end
+
+      describe "using a bound socket that's not listening" do
+        before do
+          @server.bind(@sockaddr)
+        end
+
+        it 'raises Errno::EINVAL' do
+          lambda { @server.sysaccept }.should raise_error(Errno::EINVAL)
+        end
+      end
+    end
+
+    describe "using a bound socket that's listening" do
+      before do
+        @server.bind(@sockaddr)
+        @server.listen(1)
+
+        server_ip    = @server.local_address.ip_port
+        @server_addr = Socket.sockaddr_in(server_ip, ip_address)
+      end
+
+      after do
+        Socket.for_fd(@fd).close if @fd
+      end
+
+      describe 'without a connected client' do
+        before do
+          @client = Socket.new(family, :STREAM)
+        end
+
+        after do
+          @client.close
+        end
+
+        it 'blocks the caller until a connection is available' do
+          thread = Thread.new do
+            @fd, _ = @server.sysaccept
+          end
+
+          @client.connect(@server_addr)
+
+          thread.join(5)
+
+          thread.value.should be_an_instance_of(Array)
+        end
+      end
+
+      describe 'with a connected client' do
+        before do
+          @client = Socket.new(family, :STREAM)
+          @client.connect(@server.getsockname)
+        end
+
+        after do
+          @client.close
+        end
+
+        it 'returns an Array containing a Fixnum and an Addrinfo' do
+          @fd, addrinfo = @server.sysaccept
+
+          @fd.should be_an_instance_of(Fixnum)
+          addrinfo.should be_an_instance_of(Addrinfo)
+        end
+
+        it 'returns a new file descriptor' do
+          @fd, _ = @server.sysaccept
+
+          @fd.should_not == @client.fileno
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/tcp_server_loop_spec.rb b/spec/ruby/library/socket/socket/tcp_server_loop_spec.rb
new file mode 100644
index 0000000000..617e3d445c
--- /dev/null
+++ b/spec/ruby/library/socket/socket/tcp_server_loop_spec.rb
@@ -0,0 +1,47 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+describe 'Socket.tcp_server_loop' do
+  describe 'when no connections are available' do
+    it 'blocks the caller' do
+      lambda { Socket.tcp_server_loop('127.0.0.1', 0) }.should block_caller
+    end
+  end
+
+  describe 'when a connection is available' do
+    before do
+      @client = Socket.new(:INET, :STREAM)
+      @port   = 9998
+    end
+
+    after do
+      @sock.close if @sock
+      @client.close
+    end
+
+    it 'yields a Socket and an Addrinfo' do
+      @sock, addr = nil
+
+      thread = Thread.new do
+        Socket.tcp_server_loop('127.0.0.1', @port) do |socket, addrinfo|
+          @sock = socket
+          addr = addrinfo
+
+          break
+        end
+      end
+
+      SocketSpecs.wait_until_success do
+        @client.connect(Socket.sockaddr_in(@port, '127.0.0.1'))
+      end
+
+      # At this point the connection has been set up but the thread may not yet
+      # have returned, thus we'll need to wait a little longer for it to
+      # complete.
+      thread.join(2)
+
+      @sock.should be_an_instance_of(Socket)
+      addr.should be_an_instance_of(Addrinfo)
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/tcp_server_sockets_spec.rb b/spec/ruby/library/socket/socket/tcp_server_sockets_spec.rb
new file mode 100644
index 0000000000..10c030a8ce
--- /dev/null
+++ b/spec/ruby/library/socket/socket/tcp_server_sockets_spec.rb
@@ -0,0 +1,39 @@
+require_relative '../spec_helper'
+
+describe 'Socket.tcp_server_sockets' do
+  describe 'without a block' do
+    before do
+      @sockets = nil
+    end
+
+    after do
+      @sockets.each(&:close)
+    end
+
+    it 'returns an Array of Socket objects' do
+      @sockets = Socket.tcp_server_sockets(0)
+
+      @sockets.should be_an_instance_of(Array)
+      @sockets[0].should be_an_instance_of(Socket)
+    end
+  end
+
+  describe 'with a block' do
+    it 'yields the sockets to the supplied block' do
+      Socket.tcp_server_sockets(0) do |sockets|
+        sockets.should be_an_instance_of(Array)
+        sockets[0].should be_an_instance_of(Socket)
+      end
+    end
+
+    it 'closes all sockets after the block returns' do
+      sockets = nil
+
+      Socket.tcp_server_sockets(0) { |socks| sockets = socks }
+
+      sockets.each do |socket|
+        socket.closed?.should == true
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/tcp_spec.rb b/spec/ruby/library/socket/socket/tcp_spec.rb
new file mode 100644
index 0000000000..29f166ffc5
--- /dev/null
+++ b/spec/ruby/library/socket/socket/tcp_spec.rb
@@ -0,0 +1,70 @@
+require_relative '../spec_helper'
+
+describe 'Socket.tcp' do
+  before do
+    @server = Socket.new(:INET, :STREAM)
+    @client = nil
+
+    @server.bind(Socket.sockaddr_in(0, '127.0.0.1'))
+    @server.listen(1)
+
+    @host = @server.connect_address.ip_address
+    @port = @server.connect_address.ip_port
+  end
+
+  after do
+    @client.close if @client && !@client.closed?
+    @client = nil
+
+    @server.close
+  end
+
+  it 'returns a Socket when no block is given' do
+    @client = Socket.tcp(@host, @port)
+
+    @client.should be_an_instance_of(Socket)
+  end
+
+  it 'yields the Socket when a block is given' do
+    Socket.tcp(@host, @port) do |socket|
+      socket.should be_an_instance_of(Socket)
+    end
+  end
+
+  it 'closes the Socket automatically when a block is given' do
+    Socket.tcp(@host, @port) do |socket|
+      @socket = socket
+    end
+
+    @socket.closed?.should == true
+  end
+
+  it 'binds to a local address and port when specified' do
+    @client = Socket.tcp(@host, @port, @host, 0)
+
+    @client.local_address.ip_address.should == @host
+
+    @client.local_address.ip_port.should > 0
+    @client.local_address.ip_port.should_not == @port
+  end
+
+  it 'raises ArgumentError when 6 arguments are provided' do
+    lambda {
+      Socket.tcp(@host, @port, @host, 0, {:connect_timeout => 1}, 10)
+    }.should raise_error(ArgumentError)
+  end
+
+  it 'connects to the server' do
+    @client = Socket.tcp(@host, @port)
+
+    @client.write('hello')
+
+    connection, _ = @server.accept
+
+    begin
+      connection.recv(5).should == 'hello'
+    ensure
+      connection.close
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/udp_server_loop_on_spec.rb b/spec/ruby/library/socket/socket/udp_server_loop_on_spec.rb
new file mode 100644
index 0000000000..1cb82d72be
--- /dev/null
+++ b/spec/ruby/library/socket/socket/udp_server_loop_on_spec.rb
@@ -0,0 +1,47 @@
+require_relative '../spec_helper'
+
+describe 'Socket.udp_server_loop_on' do
+  before do
+    @server = Socket.new(:INET, :DGRAM)
+
+    @server.bind(Socket.sockaddr_in(0, '127.0.0.1'))
+  end
+
+  after do
+    @server.close
+  end
+
+  describe 'when no connections are available' do
+    it 'blocks the caller' do
+      lambda { Socket.udp_server_loop_on([@server]) }.should block_caller
+    end
+  end
+
+  describe 'when a connection is available' do
+    before do
+      @client = Socket.new(:INET, :DGRAM)
+    end
+
+    after do
+      @client.close
+    end
+
+    it 'yields the message and a Socket::UDPSource' do
+      msg  = nil
+      src  = nil
+
+      @client.connect(@server.getsockname)
+      @client.write('hello')
+
+      Socket.udp_server_loop_on([@server]) do |message, source|
+        msg = message
+        src = source
+
+        break
+      end
+
+      msg.should == 'hello'
+      src.should be_an_instance_of(Socket::UDPSource)
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/udp_server_loop_spec.rb b/spec/ruby/library/socket/socket/udp_server_loop_spec.rb
new file mode 100644
index 0000000000..95f73a5c35
--- /dev/null
+++ b/spec/ruby/library/socket/socket/udp_server_loop_spec.rb
@@ -0,0 +1,47 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+describe 'Socket.udp_server_loop' do
+  describe 'when no connections are available' do
+    it 'blocks the caller' do
+      lambda { Socket.udp_server_loop('127.0.0.1', 0) }.should block_caller
+    end
+  end
+
+  describe 'when a connection is available' do
+    before do
+      @client = Socket.new(:INET, :DGRAM)
+      @port   = 9997
+    end
+
+    after do
+      @client.close
+    end
+
+    it 'yields the message and a Socket::UDPSource' do
+      msg, src = nil
+
+      Thread.new do
+        Socket.udp_server_loop('127.0.0.1', @port) do |message, source|
+          msg = message
+          src = source
+
+          break
+        end
+      end
+
+      # Because this will return even if the server is up and running (it's UDP
+      # after all) we'll have to write and wait until "msg" is set.
+      @client.connect(Socket.sockaddr_in(@port, '127.0.0.1'))
+
+      SocketSpecs.loop_with_timeout do
+        SocketSpecs.wait_until_success { @client.write('hello') }
+
+        break if msg
+      end
+
+      msg.should == 'hello'
+      src.should be_an_instance_of(Socket::UDPSource)
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/udp_server_recv_spec.rb b/spec/ruby/library/socket/socket/udp_server_recv_spec.rb
new file mode 100644
index 0000000000..05fef4bca8
--- /dev/null
+++ b/spec/ruby/library/socket/socket/udp_server_recv_spec.rb
@@ -0,0 +1,32 @@
+require_relative '../spec_helper'
+
+describe 'Socket.udp_server_recv' do
+  before do
+    @server = Socket.new(:INET, :DGRAM)
+    @client = Socket.new(:INET, :DGRAM)
+
+    @server.bind(Socket.sockaddr_in(0, '127.0.0.1'))
+    @client.connect(@server.getsockname)
+  end
+
+  after do
+    @client.close
+    @server.close
+  end
+
+  it 'yields the message and a Socket::UDPSource' do
+    msg = nil
+    src = nil
+
+    @client.write('hello')
+
+    Socket.udp_server_recv([@server]) do |message, source|
+      msg = message
+      src = source
+      break
+    end
+
+    msg.should == 'hello'
+    src.should be_an_instance_of(Socket::UDPSource)
+  end
+end
diff --git a/spec/ruby/library/socket/socket/udp_server_sockets_spec.rb b/spec/ruby/library/socket/socket/udp_server_sockets_spec.rb
new file mode 100644
index 0000000000..3aeb472dda
--- /dev/null
+++ b/spec/ruby/library/socket/socket/udp_server_sockets_spec.rb
@@ -0,0 +1,39 @@
+require_relative '../spec_helper'
+
+describe 'Socket.udp_server_sockets' do
+  describe 'without a block' do
+    before do
+      @sockets = nil
+    end
+
+    after do
+      @sockets.each(&:close)
+    end
+
+    it 'returns an Array of Socket objects' do
+      @sockets = Socket.udp_server_sockets(0)
+
+      @sockets.should be_an_instance_of(Array)
+      @sockets[0].should be_an_instance_of(Socket)
+    end
+  end
+
+  describe 'with a block' do
+    it 'yields the sockets to the supplied block' do
+      Socket.udp_server_sockets(0) do |sockets|
+        sockets.should be_an_instance_of(Array)
+        sockets[0].should be_an_instance_of(Socket)
+      end
+    end
+
+    it 'closes all sockets after the block returns' do
+      sockets = nil
+
+      Socket.udp_server_sockets(0) { |socks| sockets = socks }
+
+      sockets.each do |socket|
+        socket.closed?.should == true
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/unix_server_loop_spec.rb b/spec/ruby/library/socket/socket/unix_server_loop_spec.rb
new file mode 100644
index 0000000000..52c535cd45
--- /dev/null
+++ b/spec/ruby/library/socket/socket/unix_server_loop_spec.rb
@@ -0,0 +1,51 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+with_feature :unix_socket do
+  describe 'Socket.unix_server_loop' do
+    before do
+      @path = SocketSpecs.socket_path
+    end
+
+    after do
+      rm_r(@path) if File.file?(@path)
+    end
+
+    describe 'when no connections are available' do
+      it 'blocks the caller' do
+        lambda { Socket.unix_server_loop(@path) }.should block_caller
+      end
+    end
+
+    describe 'when a connection is available' do
+      before do
+        @client = nil
+      end
+
+      after do
+        @sock.close if @sock
+        @client.close if @client
+      end
+
+      it 'yields a Socket and an Addrinfo' do
+        @sock, addr = nil
+
+        thread = Thread.new do
+          Socket.unix_server_loop(@path) do |socket, addrinfo|
+            @sock = socket
+            addr = addrinfo
+
+            break
+          end
+        end
+
+        @client = SocketSpecs.wait_until_success { Socket.unix(@path) }
+
+        thread.join(2)
+
+        @sock.should be_an_instance_of(Socket)
+        addr.should be_an_instance_of(Addrinfo)
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/unix_server_socket_spec.rb b/spec/ruby/library/socket/socket/unix_server_socket_spec.rb
new file mode 100644
index 0000000000..fc357740fa
--- /dev/null
+++ b/spec/ruby/library/socket/socket/unix_server_socket_spec.rb
@@ -0,0 +1,48 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+with_feature :unix_socket do
+  describe 'Socket.unix_server_socket' do
+    before do
+      @path = SocketSpecs.socket_path
+    end
+
+    after do
+      rm_r(@path)
+    end
+
+    describe 'when no block is given' do
+      before do
+        @socket = nil
+      end
+
+      after do
+        @socket.close
+      end
+
+      it 'returns a Socket' do
+        @socket = Socket.unix_server_socket(@path)
+
+        @socket.should be_an_instance_of(Socket)
+      end
+    end
+
+    describe 'when a block is given' do
+      it 'yields a Socket' do
+        Socket.unix_server_socket(@path) do |sock|
+          sock.should be_an_instance_of(Socket)
+        end
+      end
+
+      it 'closes the Socket when the block returns' do
+        socket = nil
+
+        Socket.unix_server_socket(@path) do |sock|
+          socket = sock
+        end
+
+        socket.should be_an_instance_of(Socket)
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/unix_spec.rb b/spec/ruby/library/socket/socket/unix_spec.rb
new file mode 100644
index 0000000000..add54a097d
--- /dev/null
+++ b/spec/ruby/library/socket/socket/unix_spec.rb
@@ -0,0 +1,45 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+with_feature :unix_socket do
+  describe 'Socket.unix' do
+    before do
+      @path   = SocketSpecs.socket_path
+      @server = UNIXServer.new(@path)
+      @socket = nil
+    end
+
+    after do
+      @server.close
+      @socket.close if @socket
+
+      rm_r(@path)
+    end
+
+    describe 'when no block is given' do
+      it 'returns a Socket' do
+        @socket = Socket.unix(@path)
+
+        @socket.should be_an_instance_of(Socket)
+      end
+    end
+
+    describe 'when a block is given' do
+      it 'yields a Socket' do
+        Socket.unix(@path) do |sock|
+          sock.should be_an_instance_of(Socket)
+        end
+      end
+
+      it 'closes the Socket when the block returns' do
+        socket = nil
+
+        Socket.unix(@path) do |sock|
+          socket = sock
+        end
+
+        socket.closed?.should == true
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/socket/unpack_sockaddr_in_spec.rb b/spec/ruby/library/socket/socket/unpack_sockaddr_in_spec.rb
index c76a2c54de..579ae307df 100644
--- a/spec/ruby/library/socket/socket/unpack_sockaddr_in_spec.rb
+++ b/spec/ruby/library/socket/socket/unpack_sockaddr_in_spec.rb
@@ -1,9 +1,7 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
-require 'socket'
 
 describe "Socket.unpack_sockaddr_in" do
-
   it "decodes the host name and port number of a packed sockaddr_in" do
     sockaddr = Socket.sockaddr_in 3333, '127.0.0.1'
     Socket.unpack_sockaddr_in(sockaddr).should == [3333, '127.0.0.1']
@@ -14,7 +12,27 @@ describe "Socket.unpack_sockaddr_in" do
     Socket.unpack_sockaddr_in(addrinfo).should == [3333, '127.0.0.1']
   end
 
-  platform_is_not :windows do
+  describe 'using an IPv4 address' do
+    it 'returns an Array containing the port and IP address' do
+      port = 80
+      ip   = '127.0.0.1'
+      addr = Socket.pack_sockaddr_in(port, ip)
+
+      Socket.unpack_sockaddr_in(addr).should == [port, ip]
+    end
+  end
+
+  describe 'using an IPv6 address' do
+    it 'returns an Array containing the port and IP address' do
+      port = 80
+      ip   = '::1'
+      addr = Socket.pack_sockaddr_in(port, ip)
+
+      Socket.unpack_sockaddr_in(addr).should == [port, ip]
+    end
+  end
+
+  with_feature :unix_socket do
     it "raises an ArgumentError when the sin_family is not AF_INET" do
       sockaddr = Socket.sockaddr_un '/tmp/x'
       lambda { Socket.unpack_sockaddr_in sockaddr }.should raise_error(ArgumentError)
@@ -25,5 +43,4 @@ describe "Socket.unpack_sockaddr_in" do
       lambda { Socket.unpack_sockaddr_in(addrinfo) }.should raise_error(ArgumentError)
     end
   end
-
 end
diff --git a/spec/ruby/library/socket/socket/unpack_sockaddr_un_spec.rb b/spec/ruby/library/socket/socket/unpack_sockaddr_un_spec.rb
index 8dd68b9f99..39e33c90e9 100644
--- a/spec/ruby/library/socket/socket/unpack_sockaddr_un_spec.rb
+++ b/spec/ruby/library/socket/socket/unpack_sockaddr_un_spec.rb
@@ -1,8 +1,8 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
-describe 'Socket.unpack_sockaddr_un' do
-  platform_is_not :windows do
+with_feature :unix_socket do
+  describe 'Socket.unpack_sockaddr_un' do
     it 'decodes sockaddr to unix path' do
       sockaddr = Socket.sockaddr_un('/tmp/sock')
       Socket.unpack_sockaddr_un(sockaddr).should == '/tmp/sock'
diff --git a/spec/ruby/library/socket/spec_helper.rb b/spec/ruby/library/socket/spec_helper.rb
new file mode 100644
index 0000000000..5a6dea7aa7
--- /dev/null
+++ b/spec/ruby/library/socket/spec_helper.rb
@@ -0,0 +1,16 @@
+require_relative '../../spec_helper'
+require 'socket'
+
+if %w[rbx truffleruby].include?(RUBY_ENGINE)
+  MSpec.enable_feature :pure_ruby_addrinfo
+end
+
+MSpec.enable_feature :sock_packet if Socket.const_defined?(:SOCK_PACKET)
+MSpec.enable_feature :unix_socket unless PlatformGuard.windows?
+MSpec.enable_feature :udp_cork if Socket.const_defined?(:UDP_CORK)
+MSpec.enable_feature :tcp_cork if Socket.const_defined?(:TCP_CORK)
+MSpec.enable_feature :ipv6_pktinfo if Socket.const_defined?(:IPV6_PKTINFO)
+MSpec.enable_feature :ip_mtu if Socket.const_defined?(:IP_MTU)
+MSpec.enable_feature :ipv6_nexthop if Socket.const_defined?(:IPV6_NEXTHOP)
+MSpec.enable_feature :tcp_info if Socket.const_defined?(:TCP_INFO)
+MSpec.enable_feature :ancillary_data if Socket.const_defined?(:AncillaryData)
diff --git a/spec/ruby/library/socket/tcpserver/accept_nonblock_spec.rb b/spec/ruby/library/socket/tcpserver/accept_nonblock_spec.rb
index 8566081d2f..27d6a0d08e 100644
--- a/spec/ruby/library/socket/tcpserver/accept_nonblock_spec.rb
+++ b/spec/ruby/library/socket/tcpserver/accept_nonblock_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "Socket::TCPServer.accept_nonblock" do
@@ -46,3 +46,39 @@ describe "Socket::TCPServer.accept_nonblock" do
     end
   end
 end
+
+describe 'TCPServer#accept_nonblock' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before do
+      @server = TCPServer.new(ip_address, 0)
+    end
+
+    after do
+      @server.close
+    end
+
+    describe 'without a connected client' do
+      it 'raises IO::WaitReadable' do
+        lambda { @server.accept_nonblock }.should raise_error(IO::WaitReadable)
+      end
+    end
+
+    platform_is_not :windows do # spurious
+      describe 'with a connected client' do
+        before do
+          @client = TCPSocket.new(ip_address, @server.connect_address.ip_port)
+        end
+
+        after do
+          @socket.close if @socket
+          @client.close
+        end
+
+        it 'returns a TCPSocket' do
+          @socket = @server.accept_nonblock
+          @socket.should be_an_instance_of(TCPSocket)
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/tcpserver/accept_spec.rb b/spec/ruby/library/socket/tcpserver/accept_spec.rb
index b374899409..f0ef9cc727 100644
--- a/spec/ruby/library/socket/tcpserver/accept_spec.rb
+++ b/spec/ruby/library/socket/tcpserver/accept_spec.rb
@@ -1,7 +1,6 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
-
 describe "TCPServer#accept" do
   before :each do
     @server = TCPServer.new("127.0.0.1", 0)
@@ -64,3 +63,37 @@ describe "TCPServer#accept" do
     lambda { @server.accept }.should raise_error(IOError)
   end
 end
+
+describe 'TCPServer#accept' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before do
+      @server = TCPServer.new(ip_address, 0)
+    end
+
+    after do
+      @server.close
+    end
+
+    describe 'without a connected client' do
+      it 'blocks the caller' do
+        lambda { @server.accept }.should block_caller
+      end
+    end
+
+    describe 'with a connected client' do
+      before do
+        @client = TCPSocket.new(ip_address, @server.connect_address.ip_port)
+      end
+
+      after do
+        @socket.close if @socket
+        @client.close
+      end
+
+      it 'returns a TCPSocket' do
+        @socket = @server.accept
+        @socket.should be_an_instance_of(TCPSocket)
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/tcpserver/gets_spec.rb b/spec/ruby/library/socket/tcpserver/gets_spec.rb
index 6324986111..936295dce2 100644
--- a/spec/ruby/library/socket/tcpserver/gets_spec.rb
+++ b/spec/ruby/library/socket/tcpserver/gets_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "TCPServer#gets" do
diff --git a/spec/ruby/library/socket/tcpserver/initialize_spec.rb b/spec/ruby/library/socket/tcpserver/initialize_spec.rb
new file mode 100644
index 0000000000..2de8c764b2
--- /dev/null
+++ b/spec/ruby/library/socket/tcpserver/initialize_spec.rb
@@ -0,0 +1,99 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+describe 'TCPServer#initialize' do
+  describe 'with a single Fixnum argument' do
+    before do
+      @server = TCPServer.new(0)
+    end
+
+    after do
+      @server.close
+    end
+
+    it 'sets the port to the given argument' do
+      @server.local_address.ip_port.should be_an_instance_of(Fixnum)
+      @server.local_address.ip_port.should > 0
+    end
+
+    platform_is_not :windows do
+      it 'sets the hostname to 0.0.0.0' do
+        @server.local_address.ip_address.should == '0.0.0.0'
+      end
+    end
+
+    it "sets the socket to binmode" do
+      @server.binmode?.should be_true
+    end
+  end
+
+  describe 'with a single String argument containing a numeric value' do
+    before do
+      @server = TCPServer.new('0')
+    end
+
+    after do
+      @server.close
+    end
+
+    it 'sets the port to the given argument' do
+      @server.local_address.ip_port.should be_an_instance_of(Fixnum)
+      @server.local_address.ip_port.should > 0
+    end
+
+    platform_is_not :windows do
+      it 'sets the hostname to 0.0.0.0' do
+        @server.local_address.ip_address.should == '0.0.0.0'
+      end
+    end
+  end
+
+  describe 'with a single String argument containing a non numeric value' do
+    it 'raises SocketError' do
+      lambda { TCPServer.new('cats') }.should raise_error(SocketError)
+    end
+  end
+
+  describe 'with a String and a Fixnum' do
+    SocketSpecs.each_ip_protocol do |family, ip_address|
+      before do
+        @server = TCPServer.new(ip_address, 0)
+      end
+
+      after do
+        @server.close
+      end
+
+      it 'sets the port to the given port argument' do
+        @server.local_address.ip_port.should be_an_instance_of(Fixnum)
+        @server.local_address.ip_port.should > 0
+      end
+
+      it 'sets the hostname to the given host argument' do
+        @server.local_address.ip_address.should == ip_address
+      end
+    end
+  end
+
+  describe 'with a String and a custom object' do
+    before do
+      dummy = mock(:dummy)
+      dummy.stub!(:to_str).and_return('0')
+
+      @server = TCPServer.new('127.0.0.1', dummy)
+    end
+
+    after do
+      @server.close
+    end
+
+    it 'sets the port to the given port argument' do
+      @server.local_address.ip_port.should be_an_instance_of(Fixnum)
+      @server.local_address.ip_port.should > 0
+    end
+
+    it 'sets the hostname to the given host argument' do
+      @server.local_address.ip_address.should == '127.0.0.1'
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/tcpserver/listen_spec.rb b/spec/ruby/library/socket/tcpserver/listen_spec.rb
index 77a1120158..1e17de06f1 100644
--- a/spec/ruby/library/socket/tcpserver/listen_spec.rb
+++ b/spec/ruby/library/socket/tcpserver/listen_spec.rb
@@ -1,18 +1,22 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
-require 'socket'
-
 describe 'TCPServer#listen' do
-  before :each do
-    @server = TCPServer.new(SocketSpecs.hostname, 0)
-  end
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before do
+      @server = TCPServer.new(ip_address, 0)
+    end
 
-  after :each do
-    @server.close unless @server.closed?
-  end
+    after do
+      @server.close
+    end
+
+    it 'returns 0' do
+      @server.listen(1).should == 0
+    end
 
-  it 'returns 0' do
-    @server.listen(10).should == 0
+    it "raises when the given argument can't be coerced to a Fixnum" do
+      lambda { @server.listen('cats') }.should raise_error(TypeError)
+    end
   end
 end
diff --git a/spec/ruby/library/socket/tcpserver/new_spec.rb b/spec/ruby/library/socket/tcpserver/new_spec.rb
index 7504fbe128..94033411e3 100644
--- a/spec/ruby/library/socket/tcpserver/new_spec.rb
+++ b/spec/ruby/library/socket/tcpserver/new_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "TCPServer.new" do
@@ -25,7 +25,7 @@ describe "TCPServer.new" do
       addr[2].should =~ /^#{SocketSpecs.hostname}\b/
       addr[3].should == '127.0.0.1'
     else
-      addr[2].should =~ /^#{SocketSpecs.hostnamev6}\b/
+      addr[2].should =~ /^#{SocketSpecs.hostname('::1')}\b/
       addr[3].should == '::1'
     end
   end
diff --git a/spec/ruby/library/socket/tcpserver/sysaccept_spec.rb b/spec/ruby/library/socket/tcpserver/sysaccept_spec.rb
index aa6cb2bb50..144b6806f1 100644
--- a/spec/ruby/library/socket/tcpserver/sysaccept_spec.rb
+++ b/spec/ruby/library/socket/tcpserver/sysaccept_spec.rb
@@ -1,8 +1,6 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
-require 'socket'
-
 describe "TCPServer#sysaccept" do
   before :each do
     @server = TCPServer.new(SocketSpecs.hostname, 0)
@@ -30,3 +28,39 @@ describe "TCPServer#sysaccept" do
     end
   end
 end
+
+describe 'TCPServer#sysaccept' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before do
+      @server = TCPServer.new(ip_address, 0)
+    end
+
+    after do
+      @server.close
+    end
+
+    describe 'without a connected client' do
+      it 'blocks the caller' do
+        lambda { @server.sysaccept }.should block_caller
+      end
+    end
+
+    describe 'with a connected client' do
+      before do
+        @client = TCPSocket.new(ip_address, @server.connect_address.ip_port)
+      end
+
+      after do
+        Socket.for_fd(@fd).close if @fd
+        @client.close
+      end
+
+      it 'returns a new file descriptor as a Fixnum' do
+        @fd = @server.sysaccept
+
+        @fd.should be_an_instance_of(Fixnum)
+        @fd.should_not == @client.fileno
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/tcpsocket/gethostbyname_spec.rb b/spec/ruby/library/socket/tcpsocket/gethostbyname_spec.rb
index 9f25280a70..230d14bfb0 100644
--- a/spec/ruby/library/socket/tcpsocket/gethostbyname_spec.rb
+++ b/spec/ruby/library/socket/tcpsocket/gethostbyname_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 # TODO: verify these for windows
@@ -49,3 +49,63 @@ describe "TCPSocket#gethostbyname" do
     @host_info[1].should be_kind_of(Array)
   end
 end
+
+describe 'TCPSocket#gethostbyname' do
+  it 'returns an Array' do
+    TCPSocket.gethostbyname('127.0.0.1').should be_an_instance_of(Array)
+  end
+
+  describe 'using a hostname' do
+    describe 'the returned Array' do
+      before do
+        @array = TCPSocket.gethostbyname('127.0.0.1')
+      end
+
+      it 'includes the canonical name as the 1st value' do
+        @array[0].should == '127.0.0.1'
+      end
+
+      it 'includes an array of alternative hostnames as the 2nd value' do
+        @array[1].should be_an_instance_of(Array)
+      end
+
+      it 'includes the address family as the 3rd value' do
+        @array[2].should be_an_instance_of(Fixnum)
+      end
+
+      it 'includes the IP addresses as all the remaining values' do
+        ips = %w{::1 127.0.0.1}
+
+        ips.include?(@array[3]).should == true
+
+        # Not all machines might have both IPv4 and IPv6 set up, so this value is
+        # optional.
+        ips.include?(@array[4]).should == true if @array[4]
+      end
+    end
+  end
+
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    describe 'the returned Array' do
+      before do
+        @array = TCPSocket.gethostbyname(ip_address)
+      end
+
+      it 'includes the IP address as the 1st value' do
+        @array[0].should == ip_address
+      end
+
+      it 'includes an empty list of aliases as the 2nd value' do
+        @array[1].should == []
+      end
+
+      it 'includes the address family as the 3rd value' do
+        @array[2].should == family
+      end
+
+      it 'includes the IP address as the 4th value' do
+        @array[3].should == ip_address
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/tcpsocket/initialize_spec.rb b/spec/ruby/library/socket/tcpsocket/initialize_spec.rb
new file mode 100644
index 0000000000..184f9abb7d
--- /dev/null
+++ b/spec/ruby/library/socket/tcpsocket/initialize_spec.rb
@@ -0,0 +1,61 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+describe 'TCPSocket#initialize' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    describe 'when no server is listening on the given address' do
+      it 'raises Errno::ECONNREFUSED' do
+        lambda { TCPSocket.new(ip_address, 666) }.should raise_error(Errno::ECONNREFUSED)
+      end
+    end
+
+    describe 'when a server is listening on the given address' do
+      before do
+        @server = TCPServer.new(ip_address, 0)
+        @port   = @server.connect_address.ip_port
+      end
+
+      after do
+        @client.close if @client
+        @server.close
+      end
+
+      it 'returns a TCPSocket when using a Fixnum as the port' do
+        @client = TCPSocket.new(ip_address, @port)
+        @client.should be_an_instance_of(TCPSocket)
+      end
+
+      it 'returns a TCPSocket when using a String as the port' do
+        @client = TCPSocket.new(ip_address, @port.to_s)
+        @client.should be_an_instance_of(TCPSocket)
+      end
+
+      it 'raises SocketError when the port number is a non numeric String' do
+        lambda { TCPSocket.new(ip_address, 'cats') }.should raise_error(SocketError)
+      end
+
+      it 'set the socket to binmode' do
+        @client = TCPSocket.new(ip_address, @port)
+        @client.binmode?.should be_true
+      end
+
+      it 'connects to the right address' do
+        @client = TCPSocket.new(ip_address, @port)
+
+        @client.remote_address.ip_address.should == @server.local_address.ip_address
+        @client.remote_address.ip_port.should    == @server.local_address.ip_port
+      end
+
+      describe 'using a local address and service' do
+        it 'binds the client socket to the local address and service' do
+          @client = TCPSocket.new(ip_address, @port, ip_address, 0)
+
+          @client.local_address.ip_address.should == ip_address
+
+          @client.local_address.ip_port.should > 0
+          @client.local_address.ip_port.should_not == @port
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/tcpsocket/local_address_spec.rb b/spec/ruby/library/socket/tcpsocket/local_address_spec.rb
new file mode 100644
index 0000000000..ce66d5ff8f
--- /dev/null
+++ b/spec/ruby/library/socket/tcpsocket/local_address_spec.rb
@@ -0,0 +1,73 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+describe 'TCPSocket#local_address' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before do
+      @server = TCPServer.new(ip_address, 0)
+      @host   = @server.connect_address.ip_address
+      @port   = @server.connect_address.ip_port
+    end
+
+    after do
+      @server.close
+    end
+
+    describe 'using an explicit hostname' do
+      before do
+        @sock = TCPSocket.new(@host, @port)
+      end
+
+      after do
+        @sock.close
+      end
+
+      it 'returns an Addrinfo' do
+        @sock.local_address.should be_an_instance_of(Addrinfo)
+      end
+
+      describe 'the returned Addrinfo' do
+        it 'uses AF_INET as the address family' do
+          @sock.local_address.afamily.should == family
+        end
+
+        it 'uses PF_INET as the protocol family' do
+          @sock.local_address.pfamily.should == family
+        end
+
+        it 'uses SOCK_STREAM as the socket type' do
+          @sock.local_address.socktype.should == Socket::SOCK_STREAM
+        end
+
+        it 'uses the correct IP address' do
+          @sock.local_address.ip_address.should == @host
+        end
+
+        it 'uses a randomly assigned local port' do
+          @sock.local_address.ip_port.should > 0
+          @sock.local_address.ip_port.should_not == @port
+        end
+
+        it 'uses 0 as the protocol' do
+          @sock.local_address.protocol.should == 0
+        end
+      end
+    end
+
+    describe 'using an implicit hostname' do
+      before do
+        @sock = TCPSocket.new(nil, @port)
+      end
+
+      after do
+        @sock.close
+      end
+
+      describe 'the returned Addrinfo' do
+        it 'uses the correct IP address' do
+          @sock.local_address.ip_address.should == @host
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/tcpsocket/partially_closable_spec.rb b/spec/ruby/library/socket/tcpsocket/partially_closable_spec.rb
index 9416d5c71d..a381627a39 100644
--- a/spec/ruby/library/socket/tcpsocket/partially_closable_spec.rb
+++ b/spec/ruby/library/socket/tcpsocket/partially_closable_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 require_relative '../shared/partially_closable_sockets'
 
diff --git a/spec/ruby/library/socket/tcpsocket/recv_nonblock_spec.rb b/spec/ruby/library/socket/tcpsocket/recv_nonblock_spec.rb
index 23bba526e8..bfd815c658 100644
--- a/spec/ruby/library/socket/tcpsocket/recv_nonblock_spec.rb
+++ b/spec/ruby/library/socket/tcpsocket/recv_nonblock_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "TCPSocket#recv_nonblock" do
diff --git a/spec/ruby/library/socket/tcpsocket/recv_spec.rb b/spec/ruby/library/socket/tcpsocket/recv_spec.rb
new file mode 100644
index 0000000000..f380db670d
--- /dev/null
+++ b/spec/ruby/library/socket/tcpsocket/recv_spec.rb
@@ -0,0 +1,28 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+describe 'TCPSocket#recv' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before do
+      @server = TCPServer.new(ip_address, 0)
+      @client = TCPSocket.new(ip_address, @server.connect_address.ip_port)
+    end
+
+    after do
+      @client.close
+      @server.close
+    end
+
+    it 'returns the message data' do
+      @client.write('hello')
+
+      socket = @server.accept
+
+      begin
+        socket.recv(5).should == 'hello'
+      ensure
+        socket.close
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/tcpsocket/remote_address_spec.rb b/spec/ruby/library/socket/tcpsocket/remote_address_spec.rb
new file mode 100644
index 0000000000..eb9dabc075
--- /dev/null
+++ b/spec/ruby/library/socket/tcpsocket/remote_address_spec.rb
@@ -0,0 +1,72 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+describe 'TCPSocket#remote_address' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before do
+      @server = TCPServer.new(ip_address, 0)
+      @host   = @server.connect_address.ip_address
+      @port   = @server.connect_address.ip_port
+    end
+
+    after do
+      @server.close
+    end
+
+    describe 'using an explicit hostname' do
+      before do
+        @sock = TCPSocket.new(@host, @port)
+      end
+
+      after do
+        @sock.close
+      end
+
+      it 'returns an Addrinfo' do
+        @sock.remote_address.should be_an_instance_of(Addrinfo)
+      end
+
+      describe 'the returned Addrinfo' do
+        it 'uses AF_INET as the address family' do
+          @sock.remote_address.afamily.should == family
+        end
+
+        it 'uses PF_INET as the protocol family' do
+          @sock.remote_address.pfamily.should == family
+        end
+
+        it 'uses SOCK_STREAM as the socket type' do
+          @sock.remote_address.socktype.should == Socket::SOCK_STREAM
+        end
+
+        it 'uses the correct IP address' do
+          @sock.remote_address.ip_address.should == @host
+        end
+
+        it 'uses the correct port' do
+          @sock.remote_address.ip_port.should == @port
+        end
+
+        it 'uses 0 as the protocol' do
+          @sock.remote_address.protocol.should == 0
+        end
+      end
+    end
+
+    describe 'using an implicit hostname' do
+      before do
+        @sock = TCPSocket.new(nil, @port)
+      end
+
+      after do
+        @sock.close
+      end
+
+      describe 'the returned Addrinfo' do
+        it 'uses the correct IP address' do
+          @sock.remote_address.ip_address.should == @host
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/tcpsocket/setsockopt_spec.rb b/spec/ruby/library/socket/tcpsocket/setsockopt_spec.rb
index c9b0ff16dc..8b728b7522 100644
--- a/spec/ruby/library/socket/tcpsocket/setsockopt_spec.rb
+++ b/spec/ruby/library/socket/tcpsocket/setsockopt_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "TCPSocket#setsockopt" do
diff --git a/spec/ruby/library/socket/tcpsocket/shared/new.rb b/spec/ruby/library/socket/tcpsocket/shared/new.rb
index c66479a2d8..818bd69a91 100644
--- a/spec/ruby/library/socket/tcpsocket/shared/new.rb
+++ b/spec/ruby/library/socket/tcpsocket/shared/new.rb
@@ -1,4 +1,4 @@
-require_relative '../../../../spec_helper'
+require_relative '../../spec_helper'
 require_relative '../../fixtures/classes'
 
 describe :tcpsocket_new, shared: true do
diff --git a/spec/ruby/library/socket/udpsocket/bind_spec.rb b/spec/ruby/library/socket/udpsocket/bind_spec.rb
index be62608e1b..4dbdb285f6 100644
--- a/spec/ruby/library/socket/udpsocket/bind_spec.rb
+++ b/spec/ruby/library/socket/udpsocket/bind_spec.rb
@@ -1,8 +1,7 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
-describe "UDPSocket.bind" do
-
+describe "UDPSocket#bind" do
   before :each do
     @socket = UDPSocket.new
   end
@@ -34,9 +33,51 @@ describe "UDPSocket.bind" do
   end
 
   it "binds to INADDR_ANY if the hostname is empty" do
-    @socket.bind("", 0)
+    @socket.bind("", 0).should == 0
     port, host = Socket.unpack_sockaddr_in(@socket.getsockname)
     host.should == "0.0.0.0"
     port.should == @socket.addr[1]
   end
 end
+
+describe 'UDPSocket#bind' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before do
+      @socket = UDPSocket.new(family)
+    end
+
+    after do
+      @socket.close
+    end
+
+    it 'binds to an address and port' do
+      @socket.bind(ip_address, 0).should == 0
+
+      @socket.local_address.ip_address.should == ip_address
+      @socket.local_address.ip_port.should > 0
+    end
+
+    it 'binds to an address and port using String arguments' do
+      @socket.bind(ip_address, '0').should == 0
+
+      @socket.local_address.ip_address.should == ip_address
+      @socket.local_address.ip_port.should > 0
+    end
+
+    it 'can receive data after being bound to an address' do
+      @socket.bind(ip_address, 0)
+
+      addr   = @socket.connect_address
+      client = UDPSocket.new(family)
+
+      client.connect(addr.ip_address, addr.ip_port)
+      client.write('hello')
+
+      begin
+        @socket.recv(6).should == 'hello'
+      ensure
+        client.close
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/udpsocket/connect_spec.rb b/spec/ruby/library/socket/udpsocket/connect_spec.rb
new file mode 100644
index 0000000000..d92bdeb981
--- /dev/null
+++ b/spec/ruby/library/socket/udpsocket/connect_spec.rb
@@ -0,0 +1,35 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+describe 'UDPSocket#connect' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before do
+      @socket = UDPSocket.new(family)
+    end
+
+    after do
+      @socket.close
+    end
+
+    it 'connects to an address even when it is not used' do
+      @socket.connect(ip_address, 9996).should == 0
+    end
+
+    it 'can send data after connecting' do
+      receiver = UDPSocket.new(family)
+
+      receiver.bind(ip_address, 0)
+
+      addr = receiver.connect_address
+
+      @socket.connect(addr.ip_address, addr.ip_port)
+      @socket.write('hello')
+
+      begin
+        receiver.recv(6).should == 'hello'
+      ensure
+        receiver.close
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/udpsocket/initialize_spec.rb b/spec/ruby/library/socket/udpsocket/initialize_spec.rb
new file mode 100644
index 0000000000..5df3bf9800
--- /dev/null
+++ b/spec/ruby/library/socket/udpsocket/initialize_spec.rb
@@ -0,0 +1,36 @@
+require_relative '../spec_helper'
+
+describe 'UDPSocket#initialize' do
+  after do
+    @socket.close if @socket
+  end
+
+  it 'initializes a new UDPSocket' do
+    @socket = UDPSocket.new
+    @socket.should be_an_instance_of(UDPSocket)
+  end
+
+  it 'initializes a new UDPSocket using a Fixnum' do
+    @socket = UDPSocket.new(Socket::AF_INET)
+    @socket.should be_an_instance_of(UDPSocket)
+  end
+
+  it 'initializes a new UDPSocket using a Symbol' do
+    @socket = UDPSocket.new(:INET)
+    @socket.should be_an_instance_of(UDPSocket)
+  end
+
+  it 'initializes a new UDPSocket using a String' do
+    @socket = UDPSocket.new('INET')
+    @socket.should be_an_instance_of(UDPSocket)
+  end
+
+  it 'sets the socket to binmode' do
+    @socket = UDPSocket.new(:INET)
+    @socket.binmode?.should be_true
+  end
+
+  it 'raises Errno::EAFNOSUPPORT when given an invalid address family' do
+    lambda { UDPSocket.new(666) }.should raise_error(Errno::EAFNOSUPPORT)
+  end
+end
diff --git a/spec/ruby/library/socket/udpsocket/inspect_spec.rb b/spec/ruby/library/socket/udpsocket/inspect_spec.rb
new file mode 100644
index 0000000000..201e8b3fc6
--- /dev/null
+++ b/spec/ruby/library/socket/udpsocket/inspect_spec.rb
@@ -0,0 +1,25 @@
+require_relative '../spec_helper'
+
+describe 'UDPSocket#inspect' do
+  before do
+    @socket = UDPSocket.new
+    @socket.bind('127.0.0.1', 0)
+  end
+
+  after do
+    @socket.close
+  end
+
+  ruby_version_is ""..."2.5" do
+    it 'returns a String with the fd' do
+      @socket.inspect.should == "#<UDPSocket:fd #{@socket.fileno}>"
+    end
+  end
+
+  ruby_version_is "2.5" do
+    it 'returns a String with the fd, family, address and port' do
+      port = @socket.addr[1]
+      @socket.inspect.should == "#<UDPSocket:fd #{@socket.fileno}, AF_INET, 127.0.0.1, #{port}>"
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/udpsocket/local_address_spec.rb b/spec/ruby/library/socket/udpsocket/local_address_spec.rb
new file mode 100644
index 0000000000..92e4cc10c7
--- /dev/null
+++ b/spec/ruby/library/socket/udpsocket/local_address_spec.rb
@@ -0,0 +1,80 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+describe 'UDPSocket#local_address' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before do
+      @server = Socket.new(family, :DGRAM, Socket::IPPROTO_UDP)
+
+      @server.bind(Socket.sockaddr_in(0, ip_address))
+
+      @host = @server.connect_address.ip_address
+      @port = @server.connect_address.ip_port
+    end
+
+    after do
+      @server.close
+    end
+
+    describe 'using an explicit hostname' do
+      before do
+        @sock = UDPSocket.new(family)
+
+        @sock.connect(@host, @port)
+      end
+
+      after do
+        @sock.close
+      end
+
+      it 'returns an Addrinfo' do
+        @sock.local_address.should be_an_instance_of(Addrinfo)
+      end
+
+      describe 'the returned Addrinfo' do
+        it 'uses the correct address family' do
+          @sock.local_address.afamily.should == family
+        end
+
+        it 'uses the correct protocol family' do
+          @sock.local_address.pfamily.should == family
+        end
+
+        it 'uses SOCK_DGRAM as the socket type' do
+          @sock.local_address.socktype.should == Socket::SOCK_DGRAM
+        end
+
+        it 'uses the correct IP address' do
+          @sock.local_address.ip_address.should == @host
+        end
+
+        it 'uses a randomly assigned local port' do
+          @sock.local_address.ip_port.should > 0
+          @sock.local_address.ip_port.should_not == @port
+        end
+
+        it 'uses 0 as the protocol' do
+          @sock.local_address.protocol.should == 0
+        end
+      end
+    end
+
+    describe 'using an implicit hostname' do
+      before do
+        @sock = UDPSocket.new(family)
+
+        @sock.connect(nil, @port)
+      end
+
+      after do
+        @sock.close
+      end
+
+      describe 'the returned Addrinfo' do
+        it 'uses the correct IP address' do
+          @sock.local_address.ip_address.should == @host
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/udpsocket/new_spec.rb b/spec/ruby/library/socket/udpsocket/new_spec.rb
index b2662277c4..30e7103d16 100644
--- a/spec/ruby/library/socket/udpsocket/new_spec.rb
+++ b/spec/ruby/library/socket/udpsocket/new_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe 'UDPSocket.new' do
diff --git a/spec/ruby/library/socket/udpsocket/open_spec.rb b/spec/ruby/library/socket/udpsocket/open_spec.rb
index 2db17fe090..e4dbb2ee2a 100644
--- a/spec/ruby/library/socket/udpsocket/open_spec.rb
+++ b/spec/ruby/library/socket/udpsocket/open_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "UDPSocket.open" do
diff --git a/spec/ruby/library/socket/udpsocket/recvfrom_nonblock_spec.rb b/spec/ruby/library/socket/udpsocket/recvfrom_nonblock_spec.rb
new file mode 100644
index 0000000000..48b7360035
--- /dev/null
+++ b/spec/ruby/library/socket/udpsocket/recvfrom_nonblock_spec.rb
@@ -0,0 +1,88 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+describe 'UDPSocket#recvfrom_nonblock' do
+  SocketSpecs.each_ip_protocol do |family, ip_address, family_name|
+    before do
+      @server = UDPSocket.new(family)
+      @client = UDPSocket.new(family)
+    end
+
+    after do
+      @client.close
+      @server.close
+    end
+
+    platform_is_not :windows do
+      describe 'using an unbound socket' do
+        it 'raises IO::WaitReadable' do
+          lambda { @server.recvfrom_nonblock(1) }.should raise_error(IO::WaitReadable)
+        end
+      end
+    end
+
+    describe 'using a bound socket' do
+      before do
+        @server.bind(ip_address, 0)
+
+        addr = @server.connect_address
+
+        @client.connect(addr.ip_address, addr.ip_port)
+      end
+
+      describe 'without any data available' do
+        it 'raises IO::WaitReadable' do
+          lambda { @server.recvfrom_nonblock(1) }.should raise_error(IO::WaitReadable)
+        end
+      end
+
+      platform_is_not :windows do
+        describe 'with data available' do
+          before do
+            @client.write('hello')
+          end
+
+          it 'returns an Array containing the data and an Array' do
+            @server.recvfrom_nonblock(1).should be_an_instance_of(Array)
+          end
+
+          describe 'the returned Array' do
+            before do
+              @array = @server.recvfrom_nonblock(1)
+            end
+
+            it 'contains the data at index 0' do
+              @array[0].should == 'h'
+            end
+
+            it 'contains an Array at index 1' do
+              @array[1].should be_an_instance_of(Array)
+            end
+          end
+
+          describe 'the returned address Array' do
+            before do
+              @addr = @server.recvfrom_nonblock(1)[1]
+            end
+
+            it 'uses the correct address family' do
+              @addr[0].should == family_name
+            end
+
+            it 'uses the port of the client' do
+              @addr[1].should == @client.local_address.ip_port
+            end
+
+            it 'uses the hostname of the client' do
+              @addr[2].should == ip_address
+            end
+
+            it 'uses the IP address of the client' do
+              @addr[3].should == ip_address
+            end
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/udpsocket/remote_address_spec.rb b/spec/ruby/library/socket/udpsocket/remote_address_spec.rb
new file mode 100644
index 0000000000..94889ce560
--- /dev/null
+++ b/spec/ruby/library/socket/udpsocket/remote_address_spec.rb
@@ -0,0 +1,79 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+describe 'UDPSocket#remote_address' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before do
+      @server = Socket.new(family, :DGRAM, Socket::IPPROTO_UDP)
+
+      @server.bind(Socket.sockaddr_in(0, ip_address))
+
+      @host = @server.connect_address.ip_address
+      @port = @server.connect_address.ip_port
+    end
+
+    after do
+      @server.close
+    end
+
+    describe 'using an explicit hostname' do
+      before do
+        @sock = UDPSocket.new(family)
+
+        @sock.connect(@host, @port)
+      end
+
+      after do
+        @sock.close
+      end
+
+      it 'returns an Addrinfo' do
+        @sock.remote_address.should be_an_instance_of(Addrinfo)
+      end
+
+      describe 'the returned Addrinfo' do
+        it 'uses the correct address family' do
+          @sock.remote_address.afamily.should == family
+        end
+
+        it 'uses the correct protocol family' do
+          @sock.remote_address.pfamily.should == family
+        end
+
+        it 'uses SOCK_DGRAM as the socket type' do
+          @sock.remote_address.socktype.should == Socket::SOCK_DGRAM
+        end
+
+        it 'uses the correct IP address' do
+          @sock.remote_address.ip_address.should == @host
+        end
+
+        it 'uses the correct port' do
+          @sock.remote_address.ip_port.should == @port
+        end
+
+        it 'uses 0 as the protocol' do
+          @sock.remote_address.protocol.should == 0
+        end
+      end
+    end
+
+    describe 'using an implicit hostname' do
+      before do
+        @sock = UDPSocket.new(family)
+
+        @sock.connect(nil, @port)
+      end
+
+      after do
+        @sock.close
+      end
+
+      describe 'the returned Addrinfo' do
+        it 'uses the correct IP address' do
+          @sock.remote_address.ip_address.should == @host
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/udpsocket/send_spec.rb b/spec/ruby/library/socket/udpsocket/send_spec.rb
index 0159e25214..b84e84b056 100644
--- a/spec/ruby/library/socket/udpsocket/send_spec.rb
+++ b/spec/ruby/library/socket/udpsocket/send_spec.rb
@@ -1,7 +1,7 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
-describe "UDPSocket.send" do
+describe "UDPSocket#send" do
   before :each do
     @port = nil
     @server_thread = Thread.new do
@@ -76,3 +76,79 @@ describe "UDPSocket.send" do
     end
   end
 end
+
+describe 'UDPSocket#send' do
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    before do
+      @server = UDPSocket.new(family)
+      @client = UDPSocket.new(family)
+
+      @server.bind(ip_address, 0)
+
+      @addr = @server.connect_address
+    end
+
+    after do
+      @server.close
+      @client.close
+    end
+
+    describe 'using a disconnected socket' do
+      describe 'without a destination address' do
+        it "raises #{SocketSpecs.dest_addr_req_error}" do
+          lambda { @client.send('hello', 0) }.should raise_error(SocketSpecs.dest_addr_req_error)
+        end
+      end
+
+      describe 'with a destination address as separate arguments' do
+        it 'returns the amount of sent bytes' do
+          @client.send('hello', 0, @addr.ip_address, @addr.ip_port).should == 5
+        end
+
+        it 'does not persist the connection after sending data' do
+          @client.send('hello', 0, @addr.ip_address, @addr.ip_port)
+
+          lambda { @client.send('hello', 0) }.should raise_error(SocketSpecs.dest_addr_req_error)
+        end
+      end
+
+      describe 'with a destination address as a single String argument' do
+        it 'returns the amount of sent bytes' do
+          @client.send('hello', 0, @server.getsockname).should == 5
+        end
+      end
+    end
+
+    describe 'using a connected socket' do
+      describe 'without an explicit destination address' do
+        before do
+          @client.connect(@addr.ip_address, @addr.ip_port)
+        end
+
+        it 'returns the amount of bytes written' do
+          @client.send('hello', 0).should == 5
+        end
+      end
+
+      describe 'with an explicit destination address' do
+        before do
+          @alt_server = UDPSocket.new(family)
+
+          @alt_server.bind(ip_address, 0)
+        end
+
+        after do
+          @alt_server.close
+        end
+
+        it 'sends the data to the given address instead' do
+          @client.send('hello', 0, @alt_server.getsockname).should == 5
+
+          lambda { @server.recv(5) }.should block_caller
+
+          @alt_server.recv(5).should == 'hello'
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/udpsocket/write_spec.rb b/spec/ruby/library/socket/udpsocket/write_spec.rb
index c2a36eaa7a..e960de1baf 100644
--- a/spec/ruby/library/socket/udpsocket/write_spec.rb
+++ b/spec/ruby/library/socket/udpsocket/write_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "UDPSocket#write" do
diff --git a/spec/ruby/library/socket/unixserver/accept_nonblock_spec.rb b/spec/ruby/library/socket/unixserver/accept_nonblock_spec.rb
index 27603aeabd..3ebe38a090 100644
--- a/spec/ruby/library/socket/unixserver/accept_nonblock_spec.rb
+++ b/spec/ruby/library/socket/unixserver/accept_nonblock_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "UNIXServer#accept_nonblock" do
@@ -34,3 +34,59 @@ describe "UNIXServer#accept_nonblock" do
     end
   end
 end
+
+with_feature :unix_socket do
+  describe 'UNIXServer#accept_nonblock' do
+    before do
+      @path   = SocketSpecs.socket_path
+      @server = UNIXServer.new(@path)
+    end
+
+    after do
+      @server.close
+      rm_r(@path)
+    end
+
+    describe 'without a client' do
+      it 'raises IO::WaitReadable' do
+        lambda { @server.accept_nonblock }.should raise_error(IO::WaitReadable)
+      end
+    end
+
+    describe 'with a client' do
+      before do
+        @client = UNIXSocket.new(@path)
+      end
+
+      after do
+        @client.close
+        @socket.close if @socket
+      end
+
+      describe 'without any data' do
+        it 'returns a UNIXSocket' do
+          @socket = @server.accept_nonblock
+          @socket.should be_an_instance_of(UNIXSocket)
+        end
+      end
+
+      describe 'with data available' do
+        before do
+          @client.write('hello')
+        end
+
+        it 'returns a UNIXSocket' do
+          @socket = @server.accept_nonblock
+          @socket.should be_an_instance_of(UNIXSocket)
+        end
+
+        describe 'the returned UNIXSocket' do
+          it 'can read the data written' do
+            @socket = @server.accept_nonblock
+            @socket.recv(5).should == 'hello'
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/unixserver/accept_spec.rb b/spec/ruby/library/socket/unixserver/accept_spec.rb
index 3c34fce59a..a1570f7013 100644
--- a/spec/ruby/library/socket/unixserver/accept_spec.rb
+++ b/spec/ruby/library/socket/unixserver/accept_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 platform_is_not :windows do
@@ -59,3 +59,59 @@ platform_is_not :windows do
     end
   end
 end
+
+with_feature :unix_socket do
+  describe 'UNIXServer#accept' do
+    before do
+      @path = SocketSpecs.socket_path
+      @server = UNIXServer.new(@path)
+    end
+
+    after do
+      @server.close
+      rm_r(@path)
+    end
+
+    describe 'without a client' do
+      it 'blocks the calling thread' do
+        lambda { @server.accept }.should block_caller
+      end
+    end
+
+    describe 'with a client' do
+      before do
+        @client = UNIXSocket.new(@path)
+      end
+
+      after do
+        @client.close
+        @socket.close if @socket
+      end
+
+      describe 'without any data' do
+        it 'returns a UNIXSocket' do
+          @socket = @server.accept
+          @socket.should be_an_instance_of(UNIXSocket)
+        end
+      end
+
+      describe 'with data available' do
+        before do
+          @client.write('hello')
+        end
+
+        it 'returns a UNIXSocket' do
+          @socket = @server.accept
+          @socket.should be_an_instance_of(UNIXSocket)
+        end
+
+        describe 'the returned UNIXSocket' do
+          it 'can read the data written' do
+            @socket = @server.accept
+            @socket.recv(5).should == 'hello'
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/unixserver/for_fd_spec.rb b/spec/ruby/library/socket/unixserver/for_fd_spec.rb
index 9f243c50a8..4f3816ad37 100644
--- a/spec/ruby/library/socket/unixserver/for_fd_spec.rb
+++ b/spec/ruby/library/socket/unixserver/for_fd_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 platform_is_not :windows do
diff --git a/spec/ruby/library/socket/unixserver/initialize_spec.rb b/spec/ruby/library/socket/unixserver/initialize_spec.rb
new file mode 100644
index 0000000000..cb186ceb76
--- /dev/null
+++ b/spec/ruby/library/socket/unixserver/initialize_spec.rb
@@ -0,0 +1,28 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+with_feature :unix_socket do
+  describe 'UNIXServer#initialize' do
+    before do
+      @path = SocketSpecs.socket_path
+      @server = UNIXServer.new(@path)
+    end
+
+    after do
+      @server.close if @server
+      rm_r @path
+    end
+
+    it 'returns a new UNIXServer' do
+      @server.should be_an_instance_of(UNIXServer)
+    end
+
+    it 'sets the socket to binmode' do
+      @server.binmode?.should be_true
+    end
+
+    it 'raises Errno::EADDRINUSE when the socket is already in use' do
+      lambda { UNIXServer.new(@path) }.should raise_error(Errno::EADDRINUSE)
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/unixserver/listen_spec.rb b/spec/ruby/library/socket/unixserver/listen_spec.rb
new file mode 100644
index 0000000000..b90b3bbb09
--- /dev/null
+++ b/spec/ruby/library/socket/unixserver/listen_spec.rb
@@ -0,0 +1,21 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+with_feature :unix_socket do
+  describe 'UNIXServer#listen' do
+    before do
+      @path   = SocketSpecs.socket_path
+      @server = UNIXServer.new(@path)
+    end
+
+    after do
+      @server.close
+
+      rm_r(@path)
+    end
+
+    it 'returns 0' do
+      @server.listen(1).should == 0
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/unixserver/new_spec.rb b/spec/ruby/library/socket/unixserver/new_spec.rb
index 0523054952..f831f40bc6 100644
--- a/spec/ruby/library/socket/unixserver/new_spec.rb
+++ b/spec/ruby/library/socket/unixserver/new_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative 'shared/new'
 
 describe "UNIXServer.new" do
diff --git a/spec/ruby/library/socket/unixserver/open_spec.rb b/spec/ruby/library/socket/unixserver/open_spec.rb
index 3bbfff42e5..f2506d9f6f 100644
--- a/spec/ruby/library/socket/unixserver/open_spec.rb
+++ b/spec/ruby/library/socket/unixserver/open_spec.rb
@@ -1,4 +1,5 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
 require_relative 'shared/new'
 
 describe "UNIXServer.open" do
diff --git a/spec/ruby/library/socket/unixserver/shared/new.rb b/spec/ruby/library/socket/unixserver/shared/new.rb
index e19a1582b6..35395826c9 100644
--- a/spec/ruby/library/socket/unixserver/shared/new.rb
+++ b/spec/ruby/library/socket/unixserver/shared/new.rb
@@ -1,6 +1,5 @@
-require_relative '../../../../spec_helper'
+require_relative '../../spec_helper'
 require_relative '../../fixtures/classes'
-require 'tempfile'
 
 describe :unixserver_new, shared: true do
   platform_is_not :windows do
diff --git a/spec/ruby/library/socket/unixserver/sysaccept_spec.rb b/spec/ruby/library/socket/unixserver/sysaccept_spec.rb
new file mode 100644
index 0000000000..864913af82
--- /dev/null
+++ b/spec/ruby/library/socket/unixserver/sysaccept_spec.rb
@@ -0,0 +1,52 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+with_feature :unix_socket do
+  describe 'UNIXServer#sysaccept' do
+    before do
+      @path   = SocketSpecs.socket_path
+      @server = UNIXServer.new(@path)
+    end
+
+    after do
+      @server.close
+
+      rm_r(@path)
+    end
+
+    describe 'without a client' do
+      it 'blocks the calling thread' do
+        lambda { @server.sysaccept }.should block_caller
+      end
+    end
+
+    describe 'with a client' do
+      before do
+        @client = UNIXSocket.new(@path)
+      end
+
+      after do
+        Socket.for_fd(@fd).close if @fd
+        @client.close
+      end
+
+      describe 'without any data' do
+        it 'returns a Fixnum' do
+          @fd = @server.sysaccept
+          @fd.should be_an_instance_of(Fixnum)
+        end
+      end
+
+      describe 'with data available' do
+        before do
+          @client.write('hello')
+        end
+
+        it 'returns a Fixnum' do
+          @fd = @server.sysaccept
+          @fd.should be_an_instance_of(Fixnum)
+        end
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/unixsocket/addr_spec.rb b/spec/ruby/library/socket/unixsocket/addr_spec.rb
index 4fd3e30532..e8431bea16 100644
--- a/spec/ruby/library/socket/unixsocket/addr_spec.rb
+++ b/spec/ruby/library/socket/unixsocket/addr_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "UNIXSocket#addr" do
@@ -16,8 +16,13 @@ describe "UNIXSocket#addr" do
       SocketSpecs.rm_socket @path
     end
 
+    it "returns an array" do
+      @client.addr.should be_kind_of(Array)
+    end
+
     it "returns the address family of this socket in an array" do
       @client.addr[0].should == "AF_UNIX"
+      @server.addr[0].should == "AF_UNIX"
     end
 
     it "returns the path of the socket in an array if it's a server" do
@@ -27,10 +32,5 @@ describe "UNIXSocket#addr" do
     it "returns an empty string for path if it's a client" do
       @client.addr[1].should == ""
     end
-
-    it "returns an array" do
-      @client.addr.should be_kind_of(Array)
-    end
   end
-
 end
diff --git a/spec/ruby/library/socket/unixsocket/initialize_spec.rb b/spec/ruby/library/socket/unixsocket/initialize_spec.rb
new file mode 100644
index 0000000000..a6217d404f
--- /dev/null
+++ b/spec/ruby/library/socket/unixsocket/initialize_spec.rb
@@ -0,0 +1,38 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+with_feature :unix_socket do
+  describe 'UNIXSocket#initialize' do
+    describe 'using a non existing path' do
+      it 'raises Errno::ENOENT' do
+        lambda { UNIXSocket.new(SocketSpecs.socket_path) }.should raise_error(Errno::ENOENT)
+      end
+    end
+
+    describe 'using an existing socket path' do
+      before do
+        @path = SocketSpecs.socket_path
+        @server = UNIXServer.new(@path)
+        @socket = UNIXSocket.new(@path)
+      end
+
+      after do
+        @socket.close
+        @server.close
+        rm_r(@path)
+      end
+
+      it 'returns a new UNIXSocket' do
+        @socket.should be_an_instance_of(UNIXSocket)
+      end
+
+      it 'sets the socket path to an empty String' do
+        @socket.path.should == ''
+      end
+
+      it 'sets the socket to binmode' do
+        @socket.binmode?.should be_true
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/unixsocket/inspect_spec.rb b/spec/ruby/library/socket/unixsocket/inspect_spec.rb
index 52b2f508c0..d2e3cabbd3 100644
--- a/spec/ruby/library/socket/unixsocket/inspect_spec.rb
+++ b/spec/ruby/library/socket/unixsocket/inspect_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "UNIXSocket#inspect" do
diff --git a/spec/ruby/library/socket/unixsocket/local_address_spec.rb b/spec/ruby/library/socket/unixsocket/local_address_spec.rb
new file mode 100644
index 0000000000..8c77519830
--- /dev/null
+++ b/spec/ruby/library/socket/unixsocket/local_address_spec.rb
@@ -0,0 +1,45 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+with_feature :unix_socket do
+  describe 'UNIXSocket#local_address' do
+    before do
+      @path   = SocketSpecs.socket_path
+      @server = UNIXServer.new(@path)
+      @client = UNIXSocket.new(@path)
+    end
+
+    after do
+      @client.close
+      @server.close
+
+      rm_r(@path)
+    end
+
+    it 'returns an Addrinfo' do
+      @client.local_address.should be_an_instance_of(Addrinfo)
+    end
+
+    describe 'the returned Addrinfo' do
+      it 'uses AF_UNIX as the address family' do
+        @client.local_address.afamily.should == Socket::AF_UNIX
+      end
+
+      it 'uses PF_UNIX as the protocol family' do
+        @client.local_address.pfamily.should == Socket::PF_UNIX
+      end
+
+      it 'uses SOCK_STREAM as the socket type' do
+        @client.local_address.socktype.should == Socket::SOCK_STREAM
+      end
+
+      it 'uses an empty socket path' do
+        @client.local_address.unix_path.should == ''
+      end
+
+      it 'uses 0 as the protocol' do
+        @client.local_address.protocol.should == 0
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/unixsocket/new_spec.rb b/spec/ruby/library/socket/unixsocket/new_spec.rb
index 8b87e9f8c2..05a6b3eda2 100644
--- a/spec/ruby/library/socket/unixsocket/new_spec.rb
+++ b/spec/ruby/library/socket/unixsocket/new_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative 'shared/new'
 
 describe "UNIXSocket.new" do
diff --git a/spec/ruby/library/socket/unixsocket/open_spec.rb b/spec/ruby/library/socket/unixsocket/open_spec.rb
index d15487be94..6c4b7c5676 100644
--- a/spec/ruby/library/socket/unixsocket/open_spec.rb
+++ b/spec/ruby/library/socket/unixsocket/open_spec.rb
@@ -1,4 +1,5 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
 require_relative 'shared/new'
 
 describe "UNIXSocket.open" do
diff --git a/spec/ruby/library/socket/unixsocket/pair_spec.rb b/spec/ruby/library/socket/unixsocket/pair_spec.rb
index ba69776b53..845ff76ecc 100644
--- a/spec/ruby/library/socket/unixsocket/pair_spec.rb
+++ b/spec/ruby/library/socket/unixsocket/pair_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 require_relative '../shared/partially_closable_sockets'
 
diff --git a/spec/ruby/library/socket/unixsocket/partially_closable_spec.rb b/spec/ruby/library/socket/unixsocket/partially_closable_spec.rb
index bbe1a8a5ba..78a64fe6be 100644
--- a/spec/ruby/library/socket/unixsocket/partially_closable_spec.rb
+++ b/spec/ruby/library/socket/unixsocket/partially_closable_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 require_relative '../shared/partially_closable_sockets'
 
diff --git a/spec/ruby/library/socket/unixsocket/path_spec.rb b/spec/ruby/library/socket/unixsocket/path_spec.rb
index 9808e4132d..317ffc0975 100644
--- a/spec/ruby/library/socket/unixsocket/path_spec.rb
+++ b/spec/ruby/library/socket/unixsocket/path_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "UNIXSocket#path" do
diff --git a/spec/ruby/library/socket/unixsocket/peeraddr_spec.rb b/spec/ruby/library/socket/unixsocket/peeraddr_spec.rb
index bb22a38b8e..ec57b40970 100644
--- a/spec/ruby/library/socket/unixsocket/peeraddr_spec.rb
+++ b/spec/ruby/library/socket/unixsocket/peeraddr_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "UNIXSocket#peeraddr" do
diff --git a/spec/ruby/library/socket/unixsocket/recv_io_spec.rb b/spec/ruby/library/socket/unixsocket/recv_io_spec.rb
index 688f1b6436..533f02a0fa 100644
--- a/spec/ruby/library/socket/unixsocket/recv_io_spec.rb
+++ b/spec/ruby/library/socket/unixsocket/recv_io_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "UNIXSocket#recv_io" do
@@ -38,7 +38,50 @@ describe "UNIXSocket#recv_io" do
       @socket = @server.accept
       @io = @socket.recv_io(File)
 
-      @io.should be_kind_of(File)
+      @io.should be_an_instance_of(File)
+    end
+  end
+end
+
+with_feature :unix_socket do
+  describe 'UNIXSocket#recv_io' do
+    before do
+      @file = File.open('/dev/null', 'w')
+      @client, @server = UNIXSocket.socketpair
+    end
+
+    after do
+      @client.close
+      @server.close
+      @io.close if @io
+      @file.close
+    end
+
+    describe 'without a custom class' do
+      it 'returns an IO' do
+        @client.send_io(@file)
+
+        @io = @server.recv_io
+        @io.should be_an_instance_of(IO)
+      end
+    end
+
+    describe 'with a custom class' do
+      it 'returns an instance of the custom class' do
+        @client.send_io(@file)
+
+        @io = @server.recv_io(File)
+        @io.should be_an_instance_of(File)
+      end
+    end
+
+    describe 'with a custom mode' do
+      it 'opens the IO using the given mode' do
+        @client.send_io(@file)
+
+        @io = @server.recv_io(File, File::WRONLY)
+        @io.should be_an_instance_of(File)
+      end
     end
   end
 end
diff --git a/spec/ruby/library/socket/unixsocket/recvfrom_spec.rb b/spec/ruby/library/socket/unixsocket/recvfrom_spec.rb
index d142d84fdc..f24caaf686 100644
--- a/spec/ruby/library/socket/unixsocket/recvfrom_spec.rb
+++ b/spec/ruby/library/socket/unixsocket/recvfrom_spec.rb
@@ -1,8 +1,7 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "UNIXSocket#recvfrom" do
-
   platform_is_not :windows do
     before :each do
       @path = SocketSpecs.socket_path
@@ -43,5 +42,56 @@ describe "UNIXSocket#recvfrom" do
       sock.close
     end
   end
+end
+
+
+with_feature :unix_socket do
+  describe 'UNIXSocket#recvfrom' do
+    describe 'using a socket pair' do
+      before do
+        @client, @server = UNIXSocket.socketpair
+        @client.write('hello')
+      end
+
+      after do
+        @client.close
+        @server.close
+      end
+
+      it 'returns an Array containing the data and address information' do
+        @server.recvfrom(5).should == ['hello', ['AF_UNIX', '']]
+      end
+    end
+
+    # These specs are taken from the rdoc examples on UNIXSocket#recvfrom.
+    describe 'using a UNIX socket constructed using UNIXSocket.for_fd' do
+      before do
+        @path1 = SocketSpecs.socket_path
+        @path2 = SocketSpecs.socket_path + '2'
+        rm_r(@path2)
 
+        @client_raw = Socket.new(:UNIX, :DGRAM)
+        @client_raw.bind(Socket.sockaddr_un(@path1))
+
+        @server_raw = Socket.new(:UNIX, :DGRAM)
+        @server_raw.bind(Socket.sockaddr_un(@path2))
+
+        @socket = UNIXSocket.for_fd(@server_raw.fileno)
+      end
+
+      after do
+        @client_raw.close
+        @server_raw.close # also closes @socket
+
+        rm_r @path1
+        rm_r @path2
+      end
+
+      it 'returns an Array containing the data and address information' do
+        @client_raw.send('hello', 0, Socket.sockaddr_un(@path2))
+
+        @socket.recvfrom(5).should == ['hello', ['AF_UNIX', @path1]]
+      end
+    end
+  end
 end
diff --git a/spec/ruby/library/socket/unixsocket/remote_address_spec.rb b/spec/ruby/library/socket/unixsocket/remote_address_spec.rb
new file mode 100644
index 0000000000..0b416254d0
--- /dev/null
+++ b/spec/ruby/library/socket/unixsocket/remote_address_spec.rb
@@ -0,0 +1,45 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+with_feature :unix_socket do
+  describe 'UNIXSocket#remote_address' do
+    before do
+      @path   = SocketSpecs.socket_path
+      @server = UNIXServer.new(@path)
+      @client = UNIXSocket.new(@path)
+    end
+
+    after do
+      @client.close
+      @server.close
+
+      rm_r(@path)
+    end
+
+    it 'returns an Addrinfo' do
+      @client.remote_address.should be_an_instance_of(Addrinfo)
+    end
+
+    describe 'the returned Addrinfo' do
+      it 'uses AF_UNIX as the address family' do
+        @client.remote_address.afamily.should == Socket::AF_UNIX
+      end
+
+      it 'uses PF_UNIX as the protocol family' do
+        @client.remote_address.pfamily.should == Socket::PF_UNIX
+      end
+
+      it 'uses SOCK_STREAM as the socket type' do
+        @client.remote_address.socktype.should == Socket::SOCK_STREAM
+      end
+
+      it 'uses the correct socket path' do
+        @client.remote_address.unix_path.should == @path
+      end
+
+      it 'uses 0 as the protocol' do
+        @client.remote_address.protocol.should == 0
+      end
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/unixsocket/send_io_spec.rb b/spec/ruby/library/socket/unixsocket/send_io_spec.rb
index fbc99be38d..a2a7d26539 100644
--- a/spec/ruby/library/socket/unixsocket/send_io_spec.rb
+++ b/spec/ruby/library/socket/unixsocket/send_io_spec.rb
@@ -1,4 +1,4 @@
-require_relative '../../../spec_helper'
+require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "UNIXSocket#send_io" do
@@ -33,3 +33,26 @@ describe "UNIXSocket#send_io" do
     end
   end
 end
+
+with_feature :unix_socket do
+  describe 'UNIXSocket#send_io' do
+    before do
+      @file = File.open('/dev/null', 'w')
+      @client, @server = UNIXSocket.socketpair
+    end
+
+    after do
+      @client.close
+      @server.close
+      @io.close if @io
+      @file.close
+    end
+
+    it 'sends an IO object' do
+      @client.send_io(@file)
+
+      @io = @server.recv_io
+      @io.should be_an_instance_of(IO)
+    end
+  end
+end
diff --git a/spec/ruby/library/socket/unixsocket/shared/new.rb b/spec/ruby/library/socket/unixsocket/shared/new.rb
index afb57f95cf..76a4e1701e 100644
--- a/spec/ruby/library/socket/unixsocket/shared/new.rb
+++ b/spec/ruby/library/socket/unixsocket/shared/new.rb
@@ -1,4 +1,4 @@
-require_relative '../../../../spec_helper'
+require_relative '../../spec_helper'
 require_relative '../../fixtures/classes'
 
 describe :unixsocket_new, shared: true do
diff --git a/spec/ruby/library/socket/unixsocket/socketpair_spec.rb b/spec/ruby/library/socket/unixsocket/socketpair_spec.rb
new file mode 100644
index 0000000000..3e9646f76b
--- /dev/null
+++ b/spec/ruby/library/socket/unixsocket/socketpair_spec.rb
@@ -0,0 +1,40 @@
+require_relative '../spec_helper'
+
+with_feature :unix_socket do
+  describe 'UNIXSocket.socketpair' do
+    before do
+      @s1, @s2 = UNIXSocket.socketpair
+    end
+
+    after do
+      @s1.close
+      @s2.close
+    end
+
+    it 'returns two UNIXSockets' do
+      @s1.should be_an_instance_of(UNIXSocket)
+      @s2.should be_an_instance_of(UNIXSocket)
+    end
+
+    it 'connects the sockets to each other' do
+      @s1.write('hello')
+
+      @s2.recv(5).should == 'hello'
+    end
+
+    it 'sets the socket paths to empty Strings' do
+      @s1.path.should == ''
+      @s2.path.should == ''
+    end
+
+    it 'sets the socket addresses to empty Strings' do
+      @s1.addr.should == ['AF_UNIX', '']
+      @s2.addr.should == ['AF_UNIX', '']
+    end
+
+    it 'sets the socket peer addresses to empty Strings' do
+      @s1.peeraddr.should == ['AF_UNIX', '']
+      @s2.peeraddr.should == ['AF_UNIX', '']
+    end
+  end
+end
diff --git a/spec/ruby/library/weakref/allocate_spec.rb b/spec/ruby/library/weakref/allocate_spec.rb
new file mode 100644
index 0000000000..76e81c4e5e
--- /dev/null
+++ b/spec/ruby/library/weakref/allocate_spec.rb
@@ -0,0 +1,8 @@
+require_relative '../../spec_helper'
+require 'weakref'
+
+describe "WeakRef#allocate" do
+  it "assigns nil as the reference" do
+    lambda { WeakRef.allocate.__getobj__ }.should raise_error(WeakRef::RefError)
+  end
+end
diff --git a/spec/ruby/library/weakref/new_spec.rb b/spec/ruby/library/weakref/new_spec.rb
new file mode 100644
index 0000000000..6290e61fe3
--- /dev/null
+++ b/spec/ruby/library/weakref/new_spec.rb
@@ -0,0 +1,13 @@
+require_relative '../../spec_helper'
+require 'weakref'
+
+describe "WeakRef#new" do
+  it "creates a subclass correctly" do
+    wr2 = Class.new(WeakRef) {
+      def __getobj__
+        :dummy
+      end
+    }
+    wr2.new(Object.new).__getobj__.should == :dummy
+  end
+end
diff --git a/spec/ruby/library/zlib/deflate/deflate_spec.rb b/spec/ruby/library/zlib/deflate/deflate_spec.rb
index 67bcf22d49..828880f8d8 100644
--- a/spec/ruby/library/zlib/deflate/deflate_spec.rb
+++ b/spec/ruby/library/zlib/deflate/deflate_spec.rb
@@ -25,7 +25,7 @@ describe "Zlib::Deflate.deflate" do
     random_generator = Random.new(0)
     deflated         = ''
 
-    Zlib.deflate(random_generator.bytes(20000)) do |chunk|
+    Zlib::Deflate.deflate(random_generator.bytes(20000)) do |chunk|
       deflated << chunk
     end
 
diff --git a/spec/ruby/library/zlib/deflate_spec.rb b/spec/ruby/library/zlib/deflate_spec.rb
new file mode 100644
index 0000000000..01538dd4e6
--- /dev/null
+++ b/spec/ruby/library/zlib/deflate_spec.rb
@@ -0,0 +1,8 @@
+require_relative '../../spec_helper'
+require "zlib"
+
+describe "Zlib#deflate" do
+  it "deflates some data" do
+    Zlib.deflate("1" * 10).should == [120, 156, 51, 52, 132, 1, 0, 10, 145, 1, 235].pack('C*')
+  end
+end
diff --git a/spec/ruby/library/zlib/inflate_spec.rb b/spec/ruby/library/zlib/inflate_spec.rb
new file mode 100644
index 0000000000..393bea4f3c
--- /dev/null
+++ b/spec/ruby/library/zlib/inflate_spec.rb
@@ -0,0 +1,8 @@
+require_relative '../../spec_helper'
+require "zlib"
+
+describe "Zlib#inflate" do
+  it "inflates some data" do
+    Zlib.inflate([120, 156, 51, 52, 132, 1, 0, 10, 145, 1, 235].pack('C*')).should == "1" * 10
+  end
+end
diff --git a/spec/ruby/optional/capi/encoding_spec.rb b/spec/ruby/optional/capi/encoding_spec.rb
index 33587bf03a..88b3e47833 100644
--- a/spec/ruby/optional/capi/encoding_spec.rb
+++ b/spec/ruby/optional/capi/encoding_spec.rb
@@ -46,10 +46,12 @@ describe "C-API Encoding function" do
     @s = CApiEncodingSpecs.new
   end
 
-  describe "rb_enc_alias" do
-    it "creates an alias for an existing Encoding" do
-      @s.rb_enc_alias("ZOMGWTFBBQ", "UTF-8").should >= 0
-      Encoding.find("ZOMGWTFBBQ").name.should == "UTF-8"
+  ruby_version_is "2.6" do
+    describe "rb_enc_alias" do
+      it "creates an alias for an existing Encoding" do
+        @s.rb_enc_alias("ZOMGWTFBBQ", "UTF-8").should >= 0
+        Encoding.find("ZOMGWTFBBQ").name.should == "UTF-8"
+      end
     end
   end
 
@@ -148,9 +150,11 @@ describe "C-API Encoding function" do
       @s.send(@method, 1).should == -1
     end
 
-    it "returns -1 for an object without an encoding" do
-      obj = Object.new
-      @s.send(@method, obj).should == -1
+    ruby_version_is "2.6" do
+      it "returns -1 for an object without an encoding" do
+        obj = Object.new
+        @s.send(@method, obj).should == -1
+      end
     end
   end
 
diff --git a/spec/ruby/optional/capi/ext/encoding_spec.c b/spec/ruby/optional/capi/ext/encoding_spec.c
index 87b97f3a1b..9ab893b86a 100644
--- a/spec/ruby/optional/capi/ext/encoding_spec.c
+++ b/spec/ruby/optional/capi/ext/encoding_spec.c
@@ -94,8 +94,6 @@ static VALUE encoding_spec_rb_default_external_encoding(VALUE self) {
 #endif
 
 #ifdef HAVE_RB_ENC_ALIAS
-extern int rb_enc_alias(const char* alias, const char* orig);
-
 static VALUE encoding_spec_rb_enc_alias(VALUE self, VALUE alias, VALUE orig) {
   return INT2NUM(rb_enc_alias(RSTRING_PTR(alias), RSTRING_PTR(orig)));
 }
diff --git a/spec/ruby/optional/capi/ext/rubyspec.h b/spec/ruby/optional/capi/ext/rubyspec.h
index 1ece9541c7..e5a90bfc88 100644
--- a/spec/ruby/optional/capi/ext/rubyspec.h
+++ b/spec/ruby/optional/capi/ext/rubyspec.h
@@ -23,6 +23,10 @@
    (RUBY_VERSION_MAJOR == (major) && RUBY_VERSION_MINOR < (minor)) || \
    (RUBY_VERSION_MAJOR == (major) && RUBY_VERSION_MINOR == (minor) && RUBY_VERSION_TEENY < (teeny)))
 
+#if RUBY_VERSION_MAJOR > 2 || (RUBY_VERSION_MAJOR == 2 && RUBY_VERSION_MINOR >= 6)
+#define RUBY_VERSION_IS_2_6
+#endif
+
 #if RUBY_VERSION_MAJOR > 2 || (RUBY_VERSION_MAJOR == 2 && RUBY_VERSION_MINOR >= 4)
 #define RUBY_VERSION_IS_2_4
 #endif
@@ -204,7 +208,9 @@
 #define HAVE_RB_DEFAULT_INTERNAL_ENCODING  1
 #define HAVE_RB_DEFAULT_EXTERNAL_ENCODING  1
 
+#ifdef RUBY_VERSION_IS_2_6
 #define HAVE_RB_ENC_ALIAS                  1
+#endif
 #define HAVE_RB_ENC_ASSOCIATE              1
 #define HAVE_RB_ENC_ASSOCIATE_INDEX        1
 #define HAVE_RB_ENC_CODEPOINT_LEN          1
diff --git a/spec/ruby/optional/capi/module_spec.rb b/spec/ruby/optional/capi/module_spec.rb
index 5ce1ed205b..b94e96e846 100644
--- a/spec/ruby/optional/capi/module_spec.rb
+++ b/spec/ruby/optional/capi/module_spec.rb
@@ -30,6 +30,20 @@ describe "CApiModule" do
       }.should complain(/already initialized constant/)
       CApiModuleSpecs::C::Z.should == 8
     end
+
+    it "allows arbitrary names, including constant names not valid in Ruby" do
+      -> {
+        CApiModuleSpecs::C.const_set(:_INVALID, 1)
+      }.should raise_error(NameError, /wrong constant name/)
+
+      @m.rb_const_set(CApiModuleSpecs::C, :_INVALID, 2)
+      @m.rb_const_get(CApiModuleSpecs::C, :_INVALID).should == 2
+
+      # Ruby-level should still not allow access
+      -> {
+        CApiModuleSpecs::C.const_get(:_INVALID)
+      }.should raise_error(NameError, /wrong constant name/)
+    end
   end
 
   describe "rb_define_module" do
@@ -140,6 +154,16 @@ describe "CApiModule" do
     it "resolves autoload constants in Object" do
       @m.rb_const_get(Object, :CApiModuleSpecsAutoload).should == 123
     end
+
+    it "allows arbitrary names, including constant names not valid in Ruby" do
+      -> {
+        CApiModuleSpecs::A.const_get(:_INVALID)
+      }.should raise_error(NameError, /wrong constant name/)
+
+      -> {
+        @m.rb_const_get(CApiModuleSpecs::A, :_INVALID)
+      }.should raise_error(NameError, /uninitialized constant/)
+    end
   end
 
   describe "rb_const_get_from" do
diff --git a/spec/ruby/security/cve_2010_1330_spec.rb b/spec/ruby/security/cve_2010_1330_spec.rb
new file mode 100644
index 0000000000..c41a5e0a2e
--- /dev/null
+++ b/spec/ruby/security/cve_2010_1330_spec.rb
@@ -0,0 +1,21 @@
+require_relative '../spec_helper'
+
+describe "String#gsub" do
+
+  it "resists CVE-2010-1330 by raising an exception on invalid UTF-8 bytes" do
+    # This original vulnerability talked about KCODE, which is no longer
+    # used. Instead we are forcing encodings here. But I think the idea is the
+    # same - we want to check that Ruby implementations raise an error on
+    # #gsub on a string in the UTF-8 encoding but with invalid an UTF-8 byte
+    # sequence.
+
+    str = "\xF6<script>"
+    str.force_encoding Encoding::ASCII_8BIT
+    str.gsub(/</, "&lt;").should == "\xF6&lt;script>".b
+    str.force_encoding Encoding::UTF_8
+    lambda {
+      str.gsub(/</, "&lt;")
+    }.should raise_error(ArgumentError, /invalid byte sequence in UTF-8/)
+  end
+
+end
-- 
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