def test_postorder(self):
a = ParseTree(
1, [ParseTree(2),
ParseTree(3, [ParseTree(4)]),
ParseTree(5)])
for i, j in zip(a.postorder(), [2, 4, 3, 5, 1]):
self.assertEqual(i, j)
def test_postorder_subtrees(self):
two = ParseTree(2)
four = ParseTree(4)
three = ParseTree(3, [four])
five = ParseTree(5)
one = ParseTree(1, [two, three, five])
for i, j in zip(one.postorder(values=False),
[two, four, three, five, one]):
self.assertEqual(i, j)
