def test_is_registered(self, mock_pyhorn):

        controller = MatterhornController('http://mh.example.edu')
        controller._hosts = [
            Mock(base_url='foo'),
            Mock(base_url='bar')
        ]
        self.assertTrue(controller.is_registered(Mock(mh_host_url="bar")))
        self.assertFalse(controller.is_registered(Mock(mh_host_url="blerg")))