def test_unregister_methods(self):
        """
        Ensuring versatileimagefield_registry unregister methods
        work as expected
        """
        self.assertTrue(
            versatileimagefield_registry._sizedimage_registry in 'crop'
        )
        versatileimagefield_registry.unregister_sizer('crop')
        self.assertFalse(
            'crop' in versatileimagefield_registry._sizedimage_registry
        )

        self.assertTrue(
            'invert' in versatileimagefield_registry._filter_registry
        )
        versatileimagefield_registry.unregister_filter('invert')
        self.assertFalse(
            'invert' in versatileimagefield_registry._filter_registry
        )
dataset/ETHPy150Open WGBH/django-versatileimagefield/tests/tests.py/VersatileImageFieldTestCase.test_unregister_methods/swapped operands of `in`