human
Solve the following python programming problem given the following code:
@ pytest.fixture 
def T(mock_profile_builder, mock_message_thread_builder, mock_message_builder) : 
    class testing (object) : 
        pass 
testing.ensure = mock.Mock () 
    testing.build_mock = mock.Mock () 
    testing.factory = mock.Mock () 
    def ensure_thread_model_resembles_okcupyd_thread(thread_model, okcupyd_thread) : 
        assert (thread_model.okc_id == okcupyd_thread.id) 
        ensure_user_model_resembles_okcupyd_profile (thread_model.initiator, okcupyd_thread.initiator) 
        ensure_user_model_resembles_okcupyd_profile (thread_model.respondent, okcupyd_thread.respondent) 
        for pair in zip (thread_model.messages, okcupyd_thread.messages) : 
            ensure_message_model_resembles_okcupyd_message (* pair) 
            assert (len (thread_model.messages) == len (okcupyd_thread.messages)) 
def ensure_message_model_resembles_okcupyd_message(message_model, okcupyd_message) : 
        assert (message_model.okc_id == okcupyd_message.id) 
        assert (message_model.sender.handle == okcupyd_message.sender.username) 
        assert (message_model.recipient.handle == okcupyd_message.recipient.username) 
        assert (message_model.text == okcupyd_message.content) 
def ensure_user_model_resembles_okcupyd_profile(user_model, okcupyd_profile) : 
        assert (user_model.handle == okcupyd_profile.username) 
testing.ensure.user_model_resembles_okcupyd_profile = ensure_user_model_resembles_okcupyd_profile 
    testing.ensure.message_model_resembles_okcupyd_message = <MASK> 
    testing.ensure.thread_model_resembles_okcupyd_thread = ensure_thread_model_resembles_okcupyd_thread 
    testing.build_mock.thread = mock_message_thread_builder 
    testing.build_mock.message = mock_message_builder 
    testing.build_mock.profile = mock_profile_builder 
    def build_message_thread() : 
        message_thread = testing.build_mock.thread () 
        return adapters.ThreadAdapter (message_thread).get_thread () [0] 
def build_user(username) : 
        profile = testing.build_mock.profile...
    
    Given the code above, what is a proper replacement for <MASK>? Choose among: ensure_user_model_resembles_okcupyd_profile, mock_profile_builder, build_message_thread, mock_message_thread_builder, build_user, mock_message_builder, ensure_message_model_resembles_okcupyd_message, build_okcupyd_user, ensure_thread_model_resembles_okcupyd_thread
assistant
#Here is a proper replacement for <MASK>.
ensure_message_model_resembles_okcupyd_message