'L{server.DNSServerFactory.__init__} accepts an C{authorities}
argument. The value of this argument is a list and is used to extend the
C{resolver} L{resolve.ResolverChain}.'

def test_authorities(self):

    dummyResolver = object()
    self.assertEqual(server.DNSServerFactory(authorities=[dummyResolver]).resolver.resolvers, [dummyResolver])
