def test_verboseLogQuiet(self):
        """
        L{server.DNSServerFactory._verboseLog} does not log messages unless
        C{verbose > 0}.
        """
        f = server.DNSServerFactory()
        assertLogMessage(
            self,
            [],
            f._verboseLog,
            'Foo Bar'
        )

        L{server.DNSServerFactory._verboseLog} does not log messages unless
        C{verbose > 0}.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/names/test/test_server.py