def test_1(self):
a = TreeNode(1)
b = TreeNode(2)
c = TreeNode(3)
d = TreeNode(4)
e = TreeNode(5)
a.left = b
a.right = c
c.left = d
c.right = e
self.assertEqual(lot.levelOrder(a), [[1],[2,3],[4,5]])
def test_1(self):
a = TreeNode(1)
b = TreeNode(2)
c = TreeNode(3)
a.left = b
a.right = c
self.assertEqual(lot.levelOrder(a), [[1],[2,3]])