Function test_unraisable_collection_failure

testing/test_unraisableexception.py:193–218

(pytester: Pytester)

def test_unraisable_collection_failure(pytester: Pytester) -> None:
    pytester.makepyfile(
        test_it=f"""
        class BrokenDel:
            def __del__(self):
                raise ValueError("del is broken")

        def test_it():
            obj = BrokenDel()
            del obj
            {"import gc; gc.collect()" * PYPY}

        def test_2(): pass
        """
    )

    class MyError(BaseException):
        pass

    with mock.patch("traceback.format_exception", side_effect=MyError):
        result = pytester.runpytest()
    assert result.ret == 1
    result.assert_outcomes(passed=1, failed=1)
    result.stdout.fnmatch_lines(
        ["E               RuntimeError: Failed to process unraisable exception"]
    )


def _set_gc_state(enabled: bool) -> bool: