def test_complete_binary_tree(self):
"""Complete Binary Tree
All levels are completely filled except the last level, which
has all keys as left as possible.
18
/ \
/ \
/ \
15 20
/ \ / \
40 50 16 25
/ \ /
8 7 1
"""
self.root = BinaryNode(18)
self.root.left = BinaryNode(15)
self.root.right = BinaryNode(20)
self.root.left.left = BinaryNode(40)
self.root.left.right = BinaryNode(50)
self.root.right.left = BinaryNode(16)
self.root.right.right = BinaryNode(25)
self.root.left.left.left = BinaryNode(8)
self.root.left.left.right = BinaryNode(7)
self.root.left.right.left = BinaryNode(1)
self.assertEqual(pre_order_traversal(self.root),
[18, 15, 40, 8, 7, 50, 1, 20, 16, 25])
def setUp(self):
"""Valid binary search tree."""
self.root = BinaryNode(18)
self.root.left = BinaryNode(15)
self.root.right = BinaryNode(20)
self.root.left.left = BinaryNode(9)
self.root.left.right = BinaryNode(17)
def create_tree():
data = raw_input("please input a char(# for blank): ")
if data == "#":
return None
node = BinaryNode(data)
node.lchild = BinaryTree.create_tree()
node.rchild = BinaryTree.create_tree()
return node
def test_small_valid_bst(self):
"""Binary Tree
2
/ \
1 5
"""
self.root = BinaryNode(2)
self.root.left = BinaryNode(1)
self.root.right = BinaryNode(5)
self.assertTrue(validate_bst(self.root))
def test_invalid_bst(self):
"""Binary Tree
5
/ \
/ \
/ \
1 4
/ \
3 6
"""
self.root = BinaryNode(5)
self.root.left = BinaryNode(1)
self.root.right = BinaryNode(4)
self.root.right.left = BinaryNode(3)
self.root.right.right = BinaryNode(6)
self.assertFalse(validate_bst(self.root))
def test_strict_binary_tree(self):
"""Strict Binary Tree
Each node has exactly 0 or 2 children.
18
/ \
/ \
/ \
15 20
/ \
40 50
"""
self.root = BinaryNode(18)
self.root.left = BinaryNode(15)
self.root.right = BinaryNode(20)
self.root.left.left = BinaryNode(40)
self.root.left.right = BinaryNode(50)
self.assertEqual(pre_order_traversal(self.root), [18, 15, 40, 50, 20])
def setUp(self):
"""Binary Tree
30
/ \
/ \
/ \
11 29
/ \ / \
8 12 25 14
"""
self.root = BinaryNode(30)
self.root.left = BinaryNode(11)
self.root.right = BinaryNode(29)
self.root.left.left = BinaryNode(8)
self.root.left.right = BinaryNode(12)
self.root.right.left = BinaryNode(25)
self.root.right.right = BinaryNode(14)
def test_large_valid_bst(self):
"""Binary Tree
8
/ \
/ \
/ \
6 10
/ \ / \
3 7 9 12
"""
self.root = BinaryNode(8)
self.root.left = BinaryNode(6)
self.root.right = BinaryNode(10)
self.root.left.left = BinaryNode(3)
self.root.left.right = BinaryNode(7)
self.root.right.left = BinaryNode(9)
self.root.right.right = BinaryNode(12)
self.assertTrue(validate_bst(self.root))
def test_full_binary_tree(self):
"""Full (Perfect) Binary Tree
Each node has exactly 0 or 2 children and all leaf nodes are on
the same level.
18
/ \
/ \
/ \
15 20
/ \ / \
40 50 16 25
"""
self.root = BinaryNode(18)
self.root.left = BinaryNode(15)
self.root.right = BinaryNode(20)
self.root.left.left = BinaryNode(40)
self.root.left.right = BinaryNode(50)
self.root.right.left = BinaryNode(16)
self.root.right.right = BinaryNode(25)
self.assertEqual(pre_order_traversal(self.root),
[18, 15, 40, 50, 20, 16, 25])