def test_arg_flaglistOneFlag(self):
        """
        A single flag that is not contained in a list is parsed.
        """
        flag = b"flag"
        parsed, rest = self.server.arg_flaglist(flag)
        self.assertEqual(parsed, [flag])
        self.assertFalse(rest)

        A single flag that is not contained in a list is parsed.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/mail/test/test_imap.py