def test_equalityUdpPayloadSize(self):
        """
        Two L{OPTHeader} instances compare equal if they have the same
        udpPayloadSize.
        """
        self.assertNormalEqualityImplementation(
            dns._OPTHeader(udpPayloadSize=512),
            dns._OPTHeader(udpPayloadSize=512),
            dns._OPTHeader(udpPayloadSize=4096))

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