def test_simple(self):
root = Node(1)
root.left = Node(2)
root.right = Node(3)
root.left.left = Node(4)
root.left.right = Node(5)
root.right.left = Node(6)
root.right.right = Node(7)
lca = LowestCommonAncestor.findLCA(root, 4, 5)
assert lca.value is 2
def test_p_is_lowest(self):
root = Node(3)
root.left = Node(5)
root.right = Node(1)
root.left.left = Node(6)
root.left.right = Node(2)
root.right.left = Node(0)
root.right.right = Node(8)
root.left.right.left = Node(7)
root.left.right.right = Node(4)
lca = LowestCommonAncestor.findLCA(root, 5, 4)
assert lca.value is 5
def test_null(self):
root = None
lca = LowestCommonAncestor.findLCA(root, 4, 5)
assert lca is None