Method test_unhashable

Lib/test/test_traceback.py:2283–2307

(self)

    @cpython_only
    def test_unhashable(self):
        from _testcapi import exception_print

        class UnhashableException(Exception):
            def __eq__(self, other):
                return True

        ex1 = UnhashableException('ex1')
        ex2 = UnhashableException('ex2')
        try:
            raise ex2 from ex1
        except UnhashableException:
            try:
                raise ex1
            except UnhashableException as e:
                exc_val = e

        with captured_output("stderr") as stderr_f:
            exception_print(exc_val)

        tb = stderr_f.getvalue().strip().splitlines()
        self.assertEqual(11, len(tb))
        self.assertEqual(context_message.strip(), tb[5])
        self.assertIn('UnhashableException: ex2', tb[3])
        self.assertIn('UnhashableException: ex1', tb[10])

    def deep_eg(self):
        e = TypeError(1)