def test_resolverFactoryArgumentPresent(self):
        r = Resolver(hints=[None], resolverFactory=raisingResolverFactory)
        self.assertIdentical(r._resolverFactory, raisingResolverFactory)
L{root.Resolver.__init__} accepts a C{resolverFactory}
dataset/ETHPy150Open twisted/twisted/twisted/names/test/test_rootresolve.py/RootResolverResolverFactoryTests.test_resolverFactoryArgumentPresent