public void AddBeforeAndAfterTest()
{
CircularLinkedListNode <int> node = threeList.Find(3);
threeList.AddAfter(node, new CircularLinkedListNode <int>(5));
CircularLinkedListNode <int> sixNode = threeList.AddAfter(node, 6);
CircularLinkedListNode <int> sevenNode = threeList.AddBefore(node, 7);
threeList.AddBefore(node, new CircularLinkedListNode <int>(8));
Assert.AreEqual(6, sixNode.Value);
Assert.AreEqual(7, sevenNode.Value);
// 2 7 8 3 6 5 4
int[] values = new int[] { 2, 7, 8, 3, 6, 5, 4 };
int i = 0;
foreach (int current in threeList)
{
Assert.AreEqual(values[i], current);
i++;
}
CircularLinkedListNode <int> node2 = threeList.First;
do
{
Assert.AreSame(threeList, node2.List);
node2 = node2.Next;
}while (node2 != threeList.First);
}