def test_Have_two_levels_and_search(self):
bst = BinarySearchTree(20)
appendee = BinarySearchTree(21)
appendee2 = BinarySearchTree(22)
bst.append(appendee)
bst.append(appendee2)
self.assertEqual(appendee2, appendee.right)
def test_If_bigger_put_into_right(self):
bst = BinarySearchTree(3)
appendee = BinarySearchTree(15)
bst.append(appendee)
self.assertEqual(bst.right, appendee)
def test_initially_substantiates_children_to_the_left(self):
bst = BinarySearchTree(30)
appendee = BinarySearchTree(15)
bst.append(appendee)
self.assertEqual(bst.left, appendee)