def test_insert_multiple_iterative(self):
b = BST()
b.insert_iterative(4)
b.insert_iterative(5)
b.insert_iterative(6)
result = b.walk()
self.assertEquals(result, [4, 5, 6])
def test_insert_one_iterative(self):
b = BST()
b.insert_iterative(4)
result = b.walk()
self.assertEquals(result, [4])