def test_btree_lvl_order_4(self):
r1 = TreeNode(0)
r1.right = TreeNode(1)
exp = [0, 1]
act = TU.lvl_order(r1)
self.assertEqual(exp, act)
def test_traverse_3(self):
r = TreeNode(0)
r.right = TreeNode(1)
pre_order, in_order, post_order = [0, 1], [0, 1], [1, 0]
act_pre, act_in, act_post = TU.pre_order(r), TU.in_order_iter(
r), TU.post_order(r)
self.assertEqual(pre_order, act_pre)
self.assertEqual(in_order, act_in)
self.assertEqual(post_order, act_post)
def test_btree_lvl_order_6(self):
r1 = TreeNode(0)
r1.left = TreeNode(1)
r1.right = TreeNode(2)
r1.left.left = TreeNode(3)
r1.left.left.right = TreeNode(4)
r1.right.left = TreeNode(5)
exp = [0, 1, 2, 3, 5, 4]
act = TU.lvl_order(r1)
self.assertEqual(exp, act)
def buildTree(self, preorder: List[int], inorder: List[int]) -> TreeNode:
if not preorder:
return None
root_val = preorder[0]
root_index_of_inorder = inorder.index(root_val)
left_inorder = inorder[:root_index_of_inorder]
right_inorder = inorder[root_index_of_inorder + 1:]
left_tree_node_num = root_index_of_inorder
left_preorder = preorder[1:left_tree_node_num + 1]
right_preorder = preorder[left_tree_node_num + 1:]
root = TreeNode(root_val)
root.left = self.buildTree(left_preorder, left_inorder)
root.right = self.buildTree(right_preorder, right_inorder)
return root
def test_traverse_5(self):
r = TreeNode(0)
r.left = TreeNode(1)
r.right = TreeNode(2)
r.left.left = TreeNode(3)
r.left.right = TreeNode(4)
r.right.right = TreeNode(6)
pre_order, in_order, post_order = ([0, 1, 3, 4, 2, 6],
[3, 1, 4, 0, 2, 6],
[3, 4, 1, 6, 2, 0])
act_pre, act_in, act_post = TU.pre_order(r), TU.in_order_iter(
r), TU.post_order(r)
self.assertEqual(pre_order, act_pre)
self.assertEqual(in_order, act_in)
self.assertEqual(post_order, act_post)
def test_traverse_6(self):
root = TreeNode(0)
root.left = TreeNode(1)
root.right = TreeNode(2)
root.left.left = TreeNode(3)
root.left.right = TreeNode(4)
root.left.left.right = TreeNode(5)
root.right.right = TreeNode(6)
root.right.right.left = TreeNode(7)
pre_order, in_order, post_order = ([0, 1, 3, 5, 4, 2, 6, 7],
[3, 5, 1, 4, 0, 2, 7, 6],
[5, 3, 4, 1, 7, 6, 2, 0])
act_pre, act_in, act_post = \
TU.pre_order(root), TU.in_order_iter(root), TU.post_order(root)
self.assertEqual(pre_order, act_pre)
self.assertEqual(in_order, act_in)
self.assertEqual(post_order, act_post)
def test_btree_to_string_8(self):
r1 = TreeNode(0)
r1.left = TreeNode(1)
r1.right = TreeNode(2)
r1.left.left = TreeNode(3)
r1.left.right = TreeNode(5)
r1.left.left.right = TreeNode(7)
r1.right.right = TreeNode(4)
r1.right.right.left = TreeNode(8)
act = TU.to_string(r1)
print(act)
def test_btree_lvl_order_2(self):
r1 = TreeNode(0)
exp = [0]
act = TU.lvl_order(r1)
self.assertEqual(exp, act)
def test_equal_5(self):
r1 = TreeNode(0)
r1.left = TreeNode(1)
r1.right = TreeNode(2)
r1.left.left = TreeNode(3)
r1.right.right = TreeNode(0)
r2 = TreeNode(0)
r2.left = TreeNode(1)
r2.left.left = TreeNode(3)
r2.right = TreeNode(2)
r2.right.right = TreeNode(0)
self.assertTrue(TU.is_equal_trees(r1, r2))
def test_equal_4(self):
r1 = TreeNode(0)
r1.left = TreeNode(1)
r1.right = TreeNode(2)
r2 = TreeNode(0)
r2.left = TreeNode(1)
r2.right = TreeNode(1)
self.assertFalse(TU.is_equal_trees(r1, r2))
def test_equal_2(self):
r1 = TreeNode(0)
r2 = TreeNode(0)
self.assertTrue(TU.is_equal_trees(r1, r2))
def test_equal_1(self):
root1 = TreeNode(0)
self.assertTrue(TU.is_equal_trees(root1, root1))
def test_equal_0(self):
root1 = TreeNode(0)
root2 = None
self.assertFalse(TU.is_equal_trees(root1, root2))
