def test_equalityExtendedRCODE(self):
        """
        Two L{OPTHeader} instances compare equal if they have the same
        extendedRCODE.
        """
        self.assertNormalEqualityImplementation(
            dns._OPTHeader(extendedRCODE=1),
            dns._OPTHeader(extendedRCODE=1),
            dns._OPTHeader(extendedRCODE=2))

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