1 files changed, 22 insertions, 1 deletions
diff --git a/spec/ruby/library/socket/basicsocket/recv_nonblock_spec.rb b/spec/ruby/library/socket/basicsocket/recv_nonblock_spec.rb
index 0363f2f8de..17c846054d 100644
--- a/spec/ruby/library/socket/basicsocket/recv_nonblock_spec.rb
+++ b/spec/ruby/library/socket/basicsocket/recv_nonblock_spec.rb
@@ -52,7 +52,7 @@ describe "Socket::BasicSocket#recv_nonblock" do
       @s2.send("data", 0, @s1.getsockname)
       IO.select([@s1], nil, nil, 2)
 
-      buf = "foo"
+      buf = +"foo"
       @s1.recv_nonblock(5, 0, buf)
       buf.should == "data"
     end
@@ -67,4 +67,25 @@ describe "Socket::BasicSocket#recv_nonblock" do
       }.should raise_error(IO::WaitReadable)
     end
   end
+
+  SocketSpecs.each_ip_protocol do |family, ip_address|
+    describe 'using a connected but not bound socket' do
+      before do
+        @server = Socket.new(family, :STREAM)
+      end
+
+      after do
+        @server.close
+      end
+
+      it "raises Errno::ENOTCONN" do
+        -> { @server.recv_nonblock(1) }.should raise_error { |e|
+          [Errno::ENOTCONN, Errno::EINVAL].should.include?(e.class)
+        }
+        -> { @server.recv_nonblock(1, exception: false) }.should raise_error { |e|
+          [Errno::ENOTCONN, Errno::EINVAL].should.include?(e.class)
+        }
+      end
+    end
+  end
 end