public void TestNull()
{
ListNode head = null;
Assert.IsNull(ReverseList.Process(head));
Assert.IsNull(ReverseList.Process_Recursively(head));
}
public void TestOnlyOneNode()
{
ListNode head = new ListNode(1);
Assert.AreEqual(new ListNode(1), ReverseList.Process(head));
head = new ListNode(1);
Assert.AreEqual(new ListNode(1), ReverseList.Process_Recursively(head));
}
public void TestLengthIsOdd()
{
ListNode head = Helper.CreateLinkedList(new int[] { 1, 2, 3 });
ListNode expected = Helper.CreateLinkedList(new int[] { 3, 2, 1 });
Assert.IsTrue(Helper.CompareLinkedList(expected, ReverseList.Process(head)));
head = Helper.CreateLinkedList(new int[] { 1, 2, 3 });
Assert.IsTrue(Helper.CompareLinkedList(expected, ReverseList.Process_Recursively(head)));
}