def test_levelorder(self):
        exp = ['root', 'i1', 'i2', 'a', 'b', 'c', 'd']
        obs = [n.name for n in self.simple_t.levelorder()]
        self.assertEqual(obs, exp)
network-service-policy-list --sort-key name --sort-key id
dataset/ETHPy150Open biocore/scikit-bio/skbio/tree/tests/test_tree.py/TreeTests.test_levelorder--crossover with--dataset/ETHPy150Open openstack/python-group-based-policy-client/gbpclient/tests/unit/test_cli20_networkservicepolicy.py/CLITestV20NetworkServicePolicyJSON.test_list_network_sercice_policies_sort