def test_authenticData(self):
        """
        Two L{dns._EDNSMessage} instances compare equal if they have the same
        authenticData flags.
        """
        self.assertNormalEqualityImplementation(
            self.messageFactory(authenticData=True),
            self.messageFactory(authenticData=True),
            self.messageFactory(authenticData=False),
            )

        Two L{dns._EDNSMessage} instances compare equal if they have the same
        authenticData flags.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/names/test/test_dns.py