spec/ruby/library/socket/*: more FreeBSD fixes

FreeBSD portability notes:

Loopback connections are not instantaneous (unlike Linux), so
non-blocking read-after-write MUST check for readability via
IO.select or IO#wait_readable before attempting non-blocking
recv/read operations.

IPv6 seems favored, so we'll get "::" instead of "0.0.0.0"

Some constants are different or obsolete, so that should be
self-explanatory.

There are still other failures I or somebody else needs to get
to when we have time and feel like dealing with spec DSL:

      http://rubyci.s3.amazonaws.com/freebsd11zfs/ruby-trunk/recent.html

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64239 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 12 insertions, 1 deletions

diff --git a/spec/ruby/library/socket/constants/constants_spec.rb b/spec/ruby/library/socket/constants/constants_spec.rb
index 2d44636abd..2a218c7c5d 100644
--- a/spec/ruby/library/socket/constants/constants_spec.rb
+++ b/spec/ruby/library/socket/constants/constants_spec.rb
@@ -89,11 +89,22 @@ describe "Socket::Constants" do
 
   platform_is_not :windows do
     it 'defines SCM options' do
-      Socket::Constants.should have_constant('SCM_CREDENTIALS')
+      platform_is :freebsd do
+        Socket::Constants.should have_constant('SCM_CREDS')
+      end
+      platform_is_not :freebsd do
+        Socket::Constants.should have_constant('SCM_CREDENTIALS')
+      end
     end
 
     it 'defines error options' do
       consts = ["EAI_ADDRFAMILY", "EAI_NODATA"]
+
+      # FreeBSD (11.1, at least) obsoletes EAI_ADDRFAMILY and EAI_NODATA
+      platform_is :freebsd do
+        consts = %w(EAI_MEMORY)
+      end
+
       consts.each do |c|
         Socket::Constants.should have_constant(c)
       end