def assert_passes(self, warnings_pass=False):
        assert not self.err.failed(fail_on_warnings=not warnings_pass), \
                ("Test was intended to pass%s, but it did not." %
                     (" with warnings" if warnings_pass else ""))
Assert that no errors have been raised. If warnings_pass is True, also
dataset/ETHPy150Open mozilla/app-validator/tests/helper.py/TestCase.assert_passes