def test_traverse(): """Test traversing a task hierarchy to collect infos. """ root = RootTask() task1 = ComplexTask(name='task1', database_entries={'val1': 2.0}) task2 = SimpleTask(name='task2', database_entries={'val2': 1}, access_exs={'val2': 2}) task3 = ComplexTask(name='task3') task1.add_child_task(0, task2) root.add_child_task(0, task1) root.add_child_task(1, task3) flat = list(root.traverse()) assert flat == [root, task1, task2, task3] flat = list(root.traverse(0)) assert flat == [root, task1, task3]