Add connect_timeout expect

Author: JuanCrg90

library/socket/tcpsocket/initialize_spec.rb

@@ -56,6 +56,14 @@
           @client.local_address.ip_port.should_not == @port
         end
       end
+
+    describe 'when server connection is timeout' do
+      ruby_version_is "3.0" do
+        it 'raises Errno::ETIMEDOUT' do
+          -> { TCPSocket.new(ip_address, @port, connect_timeout: 0) }.should raise_error(Errno::ETIMEDOUT)
+        end
+      end
+    end
     end
   end
 end