def test_get_ancestors_on_nested_path(self):
root = Tree('root')
a = Tree('a')
root.add_child(a)
b = Tree('b')
a.add_child(b)
ancestors = list(b.get_ancestors())
self.assertEqual(ancestors, [a, root])
def test_get_ancestors(self):
root = Tree('root')
a = Tree('a')
root.add_child(a)
ancestors = list(a.get_ancestors())
self.assertEqual(ancestors, [root])