public void InsertedBeforeHeadNode_ShouldBecomeTheHeadOfList()
{
var list = new DblLinkedList <int>();
list.InsertHead(DblLinkedList.CreateNode(1));
var newNode = DblLinkedList.CreateNode(3);
list.InsertBefore(list.Head, newNode);
list.Head.Value.Should().Be(newNode.Value);
}
public void IterativeInsertBeforeHead_ShouldProduceCorrectList(IList <int> input)
{
var list = new DblLinkedList <int>();
foreach (var i in input.Reverse())
{
list.InsertBefore(list.Head, DblLinkedList.CreateNode(i));
}
VerifyList(list, input);
}
public void IterativeInsertBefore_ShouldProduceCorrectList()
{
var input = new string[] { "1", "2", "3" };
var list = new DblLinkedList <string>();
var currentNode = list.Head;
foreach (var i in input.Reverse())
{
currentNode = list.InsertBefore(currentNode, DblLinkedList.CreateNode(i));
}
VerifyList(list, input);
}
public void InsertedBeforeNode_ShouldBeInsertedInsertedInRightPlace()
{
var list = new DblLinkedList <int>();
var node1 = DblLinkedList.CreateNode(1);
var node2 = DblLinkedList.CreateNode(2);
list.InsertHead(node1);
list.InsertHead(node2);
var newNode = DblLinkedList.CreateNode(3);
list.InsertBefore(node1, newNode);
list.Head.Next.Value.Should().Be(newNode.Value);
}