if __name__ == '__main__':
    from tests.mock import patch

    import eventlet
    from eventlet import hubs
    with patch.object(hubs, 'notify_opened') as mock_func:
        eventlet.monkey_patch(builtins=True)
        with open(__file__) as f:
            mock_func.assert_called_with(f.fileno())
    print('pass')