public void Test3()
        {
            ListNode node  = ListNode.CreateNodeList(3);
            ListNode node2 = ListNode.CreateNodeList(3);

            Assert.Equal(JsonConvert.SerializeObject(Coding015.PrintForReverse(node)), JsonConvert.SerializeObject(Coding015.PrintForReverse2(node2)));
        }
        public void TestNull()
        {
            ListNode node = null;

            Assert.Equal(JsonConvert.SerializeObject(Coding015.PrintForReverse(node)), JsonConvert.SerializeObject(Coding015.PrintForReverse2(node)));
        }