public void TestNodeInTheMiddle()
{
ListNode head = Helper.CreateLinkedList(new int[] { 1, 2, 3, 4, 5 });
Assert.AreEqual(4, KthNodeFromEnd.Process(head, 2).Value);
}
public void TestListLengthIsInsufficient()
{
ListNode head = Helper.CreateLinkedList(new int[] { 1, 2, 3, 4, 5 });
Assert.IsNull(KthNodeFromEnd.Process(head, 6));
}
public void TestKIsZero()
{
ListNode head = Helper.CreateLinkedList(new int[] { 1, 2, 3, 4, 5 });
Assert.IsNull(KthNodeFromEnd.Process(head, 0));
}
public void TestNull()
{
ListNode head = null;
Assert.IsNull(KthNodeFromEnd.Process(head, 1));
}
public void TestOnlyOneNode()
{
ListNode head = new ListNode(1);
Assert.AreEqual(1, KthNodeFromEnd.Process(head, 1).Value);
}
public void TestNodeIsHead()
{
ListNode head = Helper.CreateLinkedList(new int[] { 1, 2, 3, 4, 5 });
Assert.AreEqual(1, KthNodeFromEnd.Process(head, 5).Value);
}
