def METHOD_NAME(enabled_communicator, disabled_communicator):
    callback = Mock()
    disabled_communicator.sub_to_channel(channel="channel", callback=callback)
    assert not hasattr(disabled_communicator, "pubsub")
    enabled_communicator.sub_to_channel(channel="channel", callback=callback)
    enabled_communicator.pubsub.subscribe.assert_called_once_with(**{"channel": callback})