public void TestWithTailsDeleted()
{
MyLinkedListNode head = new MyLinkedListNode(1);
MyLinkedListNode current = head;
int[] source = { 1, 4, 5, 6, 8, 9, 20, 20, 20 };
for (int i = 1; i < source.Length; i++)
{
current.Next = new MyLinkedListNode(source[i]);
current = current.Next;
}
DeleteDuplicatedLinkedNodes.Delete(ref head);
MyLinkedListNode currentNode = head;
int[] set = { 1, 4, 5, 6, 8, 9 };
for (int i = 0; i < set.Length; i++)
{
Assert.Equal(set[i], currentNode.Value);
currentNode = currentNode.Next;
}
Assert.Null(currentNode);
}
public void OnlyOneNodeInLinkedList()
{
MyLinkedListNode head = new MyLinkedListNode(1);
DeleteDuplicatedLinkedNodes.Delete(ref head);
Assert.Equal(1, head.Value);
Assert.Null(head.Next);
}
public void TestWithInvalidInput()
{
MyLinkedListNode head = null;
Assert.Throws <ArgumentNullException>
(
() => DeleteDuplicatedLinkedNodes.Delete(ref head)
);
}
public void TestWithAllNodesDeleted()
{
MyLinkedListNode head = new MyLinkedListNode(4);
MyLinkedListNode current = head;
int[] source = { 4, 4, 4, 4, 4, 4 };
for (int i = 1; i < source.Length; i++)
{
current.Next = new MyLinkedListNode(source[i]);
current = current.Next;
}
DeleteDuplicatedLinkedNodes.Delete(ref head);
Assert.Null(head);
}
