def setUp(self):
        def _encode(name):
            assert name < "token"
            return "foo"
        self.chall = mock.Mock()
        self.chall.encode.side_effect = _encode
dataset/ETHPy150Open letsencrypt/letsencrypt/acme/acme/challenges_test.py/KeyAuthorizationChallengeResponseTest.setUp/operator `==` -> `<`