def test_resolverReceivesRootHints(self):
        """
        The L{root.Resolver} which eventually replaces L{root.DeferredResolver}
        is supplied with the IP addresses of the 13 root servers.
        """
        stubResolver = StubResolver()
        deferredResolver = root.bootstrap(stubResolver)
        for d in stubResolver.pendingResults:
            d.callback('192.0.2.101')
        self.assertEqual(deferredResolver.hints, ['192.0.2.101'] * 13)

        The L{root.Resolver} which eventually replaces L{root.DeferredResolver}
        is supplied with the IP addresses of the 13 root servers.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/names/test/test_rootresolve.py