def setUp(self):
self.root = TreeNode(0)
self.node1 = TreeNode(1)
self.node2 = TreeNode(2)
self.node3 = TreeNode(3)
self.node4 = TreeNode(4)
self.node5 = TreeNode(5)
self.node5 = TreeNode(5)
self.node6 = TreeNode(6)
self.root.left = self.node1
self.root.right = self.node2
self.node1.left = self.node3
self.node1.right = self.node4
self.node2.left = self.node5
self.node2.right = self.node6
s = Solution()
s.mylist = []
self.correct_answer = s.postorder(self.root)
def test_1_null_2_returns_2_1(self):
btree = [TreeNode(1), TreeNode(2)]
btree[0].right = btree[1]
self.assertEqual(Solution().postorder_traversal(btree[0]), [2, 1])
def test_1_null_2_3_returns_3_2_1(self):
btree = list(TreeNode(i) for i in range(1, 4))
btree[0].right = btree[1]
btree[1].left = btree[2]
self.assertEqual(Solution().postorder_traversal(btree[0]), [3, 2, 1])
def test_1_returns_1(self):
self.assertEqual(Solution().postorder_traversal(TreeNode(1)), [1])
def test_postorder_non_recusive2(self):
s = Solution()
mylist = s.postorder_non_recursive2(self.root)
self.assertListEqual(mylist, self.correct_answer)
def test_postorder(self):
s = Solution()
mylist = s.postorder(self.root)
self.assertEqual(mylist, self.correct_answer)
