def test_a6(self):
        """
        The repr of a L{dns.Record_A6} instance includes the colon-separated
        hex string representation of the address it is for and the TTL of the
        record.
        """
        self.assertEqual(
            repr(dns.Record_A6(0, '1234::5678', b'foo.bar', ttl=10)),
            "<A6 suffix=1234::5678 prefix=foo.bar ttl=10>")

        The repr of a L{dns.Record_A6} instance includes the colon-separated
        hex string representation of the address it is for and the TTL of the
        record.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/names/test/test_dns.py