public void TestRecordList()
{
var head = MyLinkList.BuildListNodeFromArray(new[] { 1, 2, 3, 4, 5, 6, 7 });
RecordList.Record(head);
Assert.AreEqual(head.Next.Next.Val, 7);
Assert.AreEqual(head.Next.Next.Next.Next.Val, 6);
Assert.AreEqual(head.Next.Next.Next.Next.Next.Next.Val, 5);
Assert.AreEqual(head.Next.Next.Next.Next.Next.Next.Next.Val, 4);
}