Class FakeUnicodeError

Lib/test/test_codeccallbacks.py:1262–1263

        ]
        for cls in UnicodeEncodeError, UnicodeDecodeError, UnicodeTranslateError:
            class FakeUnicodeError(str):
                __class__ = cls
            for handler in handlers:
                with self.subTest(handler=handler, error_class=cls):
                    self.assertRaises(TypeError, handler, FakeUnicodeError())