def test_listQueueInformation(self):
        """
        The I{-bp} option for listing queue information is unsupported and
        if it is passed to L{parseOptions}, L{SystemExit} is raised.
        """
        exc = self.assertRaises(SystemExit, parseOptions, ['-bp'])
        self.assertEqual(exc.args, ("Unsupported option.",))

        The I{-bp} option for listing queue information is unsupported and
        if it is passed to L{parseOptions}, L{SystemExit} is raised.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/mail/test/test_mailmail.py