public void TestNodeIsHead()
{
ListNode head = Helper.CreateLinkedList(new int[] { 1, 2, 3, 4, 5 });
ListNode toBeDeleted = head;
DeleteNodeInList.Process(ref head, toBeDeleted);
Assert.IsTrue(Helper.CompareLinkedList(Helper.CreateLinkedList(new int[] { 2, 3, 4, 5 }), head));
}
public void TestOnlyOneNode()
{
ListNode head = new ListNode(1);
ListNode toBeDeleted = head;
DeleteNodeInList.Process(ref head, toBeDeleted);
Assert.IsNull(head);
}
public void TestNodeInTheEnd()
{
ListNode head = Helper.CreateLinkedList(new int[] { 1, 2, 3, 4, 5 });
ListNode toBeDeleted = head;
while (toBeDeleted.Next != null)
{
toBeDeleted = toBeDeleted.Next;
}
DeleteNodeInList.Process(ref head, toBeDeleted);
Assert.IsTrue(Helper.CompareLinkedList(Helper.CreateLinkedList(new int[] { 1, 2, 3, 4 }), head));
}
public void TestNull()
{
ListNode head = null;
ListNode toBeDeleted = new ListNode(1);
DeleteNodeInList.Process(ref head, toBeDeleted);
Assert.IsNull(head);
head = toBeDeleted;
toBeDeleted = null;
DeleteNodeInList.Process(ref head, toBeDeleted);
Assert.AreEqual(new ListNode(1), head);
}
