def METHOD_NAME(self):
    """Ensure that exit codes from the `CalcJob` can be retrieved through the parser instance."""
    node = orm.CalcJobNode(computer=self.computer, process_type=ArithmeticAddCalculation.build_process_type())
    parser = ArithmeticAddParser(node)
    assert parser.exit_codes == ArithmeticAddCalculation.spec().exit_codes