'Test get_services filter works on empty clusters.'

def test_cluster_get_services_on_empty_cluster(self):

    cluster = utils.create_cluster(self.ctxt)
    db_cluster = db.cluster_get(self.ctxt, cluster.id, get_services=True)
    self.assertEqual(cluster.id, db_cluster.id)
    self.assertListEqual([], db_cluster.services)
