test_traitlets_enum.py 文件源码

def test_assign_bad_enum_value_number__raises_error(self):
        # -- CONVERT: number => Enum value (item)
        bad_numbers = [-1, 0, 5]
        for value in bad_numbers:
            self.assertIsInstance(value, int)
            assert UseEnum(Color).select_by_number(value, None) is None
            example = self.Example()
            with self.assertRaises(TraitError):
                example.color = value