def test__BST_is_bst_satisified5():
bst = BST()
bst.root = Node(0)
bst.root.left = Node(-2)
bst.root.left.left = Node(-3)
bst.root.left.right = Node(-1)
bst.root.right = Node(2)
bst.root.right.left = Node(1)
bst.root.right.right = Node(3)
assert bst.is_bst_satisfied()
def test__BST_is_bst_satisified4():
bst = BST()
bst.root = Node(0)
bst.root.left = Node(-1)
assert bst.is_bst_satisfied()
def test__BST_is_bst_satisfied2():
bst = BST()
bst.root = Node(-2)
bst.root.left = Node(-3)
bst.root.right = Node(-4)
assert not bst.is_bst_satisfied()