1 files changed, 11 insertions, 0 deletions
diff --git a/test/socket/test_basicsocket.rb b/test/socket/test_basicsocket.rb
index 59b739e813..218576a2b6 100644
--- a/test/socket/test_basicsocket.rb
+++ b/test/socket/test_basicsocket.rb
@@ -85,4 +85,15 @@ class TestSocket_BasicSocket < Test::Unit::TestCase
       }
     end
   end
+  def test_for_fd
+    assert_raise(Errno::EBADF, '[ruby-core:72418] [Bug #11854]') do
+      BasicSocket.for_fd(-1)
+    end
+    inet_stream do |sock|
+      s = BasicSocket.for_fd(sock.fileno)
+      assert_instance_of BasicSocket, s
+      s.autoclose = false
+      sock.close
+    end
+  end
 end if defined?(BasicSocket)