public void AddNullItem()
{
var list = new CircularDoublyLinkedList <string>();
list.AddFirst(null);
list.AddLast(null);
list.AddAfter(null, null);
list.AddBefore(null, null);
Assert.AreEqual(list.Count(), 4, "invalid count");
list.Remove(null);
list.RemoveFirst();
list.RemoveLast();
Assert.AreEqual(list.Count(), 1, "invalid count");
}
public override void CopyTo(T[] array, int index)
{
if (array == null)
{
throw new ArgumentNullException(nameof(array));
}
if (index < 0 || index > array.Length)
{
throw new ArgumentOutOfRangeException(nameof(index));
}
if (array.Length - index < items.Count())
{
throw new ArgumentException(nameof(index));
}
items.CopyTo(array, index);
}
public void AddFiveNodesHead()
{
for (int i = 1; i <= 5; i++)
{
circularDoublyLinkedList.AddFirst(i);
}
Assert.AreEqual(circularDoublyLinkedList.GetFirst(), 5, "invalid head element");
Assert.AreEqual(circularDoublyLinkedList.GetLast(), 1, "invalid tail element");
Assert.AreEqual(circularDoublyLinkedList.Count(), 5, "invalid count");
}
