def test_attributes_required(self):
backend = RoleBackend()
self.assertTrue(hasattr(backend, 'supports_object_permissions'))
self.assertFalse(getattr(backend, 'supports_object_permissions'))
self.assertTrue(hasattr(backend, 'supports_anonymous_user'))
self.assertFalse(getattr(backend, 'supports_anonymous_user'))
self.assertTrue(hasattr(backend, 'supports_inactive_user'))
self.assertTrue(getattr(backend, 'supports_inactive_user'))
self.assertTrue(hasattr(backend, 'authenticate'))
self.assertEqual(backend.authenticate(None, None), None)
self.assertTrue(hasattr(backend, 'has_perm'))
self.assertTrue(hasattr(backend, 'has_role'))
self.assertTrue(hasattr(backend, 'get_all_roles'))
