def test_one_namespace(self) -> None:
        '''torment.fixtures._unique_class_name({ 'f_{uuid}': None, }, uuid) == 'f_{uuid}_1' '''

        n = fixtures._unique_class_name({ 'f_' + self.uuid.hex: None, }, self.uuid)

        self.assertEqual(n, 'f_' + self.uuid.hex + '_1')