def test_DeepAllNodesOneNodeIn(self):
node = BSTNode(1, 1, None)
tree = BST(node)
result = tree.DeepAllNodes(0)
correct_answer = tuple([node])
self.assertEqual(result, correct_answer)
def test_DeepAllNodesEmptyPre(self):
tree = BST(None)
result = tree.DeepAllNodes(2)
correct_answer = tuple()
self.assertEqual(result, correct_answer)