def test(self, _, node_idents, min_path_len, expected_node_idents):
root = TreeMaker.from_node_idents(node_idents)
remove_nodes(root, min_path_len)
root_expected = TreeMaker.from_node_idents(expected_node_idents)
self.assertEqual(root, root_expected)
def test_all_removed(self, _, node_idents, min_path_len):
root = TreeMaker.from_node_idents(node_idents)
root_produced = remove_nodes(root, min_path_len)
self.assertEqual(root_produced, None)