Method test_original_unraisablehook_err

Lib/test/test_sys.py:1399–1437

(self)

            self.assertEqual(lines[-1], 'ValueError: 42')

    def test_original_unraisablehook_err(self):
        # bpo-22836: PyErr_WriteUnraisable() should give sensible reports
        class BrokenDel:
            def __del__(self):
                exc = ValueError("del is broken")
                # The following line is included in the traceback report:
                raise exc

        class BrokenStrException(Exception):
            def __str__(self):
                raise Exception("str() is broken")

        class BrokenExceptionDel:
            def __del__(self):
                exc = BrokenStrException()
                # The following line is included in the traceback report:
                raise exc

        for test_class in (BrokenDel, BrokenExceptionDel):
            with self.subTest(test_class):
                obj = test_class()
                with test.support.captured_stderr() as stderr, \
                     test.support.swap_attr(sys, 'unraisablehook',
                                            sys.__unraisablehook__):
                    # Trigger obj.__del__()
                    del obj

                report = stderr.getvalue()
                self.assertIn("Exception ignored", report)
                self.assertIn(test_class.__del__.__qualname__, report)
                self.assertIn("test_sys.py", report)
                self.assertIn("raise exc", report)
                if test_class is BrokenExceptionDel:
                    self.assertIn("BrokenStrException", report)
                    self.assertIn("<exception str() failed>", report)
                else:
                    self.assertIn("ValueError", report)
                    self.assertIn("del is broken", report)
                self.assertEndsWith(report, "\n")

    def test_original_unraisablehook_exception_qualname(self):
        # See bpo-41031, bpo-45083.