def test_verboseLogVerbose(self):
        """
        L{server.DNSServerFactory._verboseLog} logs a message if C{verbose > 0}.
        """
        f = server.DNSServerFactory(verbose=1)
        assertLogMessage(
            self,
            ['Foo Bar'],
            f._verboseLog,
            'Foo Bar'
        )

        L{server.DNSServerFactory._verboseLog} logs a message if C{verbose > 0}.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/names/test/test_server.py