public void Replace(DoublyLinkedNode <T> node, T value)
{
if (node is null)
{
throw new ArgumentNullException(nameof(node));
}
PracticeExtensions.ThrowIfNull(value, nameof(value));
var nodeIsFirst = ReferenceEquals(First, node);
var nodeIsLast = ReferenceEquals(Last, node);
if (nodeIsFirst)
{
var newNode = First.Replace(value);
First = newNode;
}
if (nodeIsLast)
{
var newNode = Last.Replace(value);
Last = newNode;
}
if (!nodeIsFirst && !nodeIsLast)
{
node.Replace(value);
}
}
public void WhenNodeIsReplaced_ThenItsPreviousAndNextReferToTheReplacement()
{
var firstNode = new DoublyLinkedNode <int>(2);
var previous = firstNode.LinkBefore(1);
var next = firstNode.LinkAfter(3);
var replacement = firstNode.Replace(5);
previous.Next.Value.Should().Be(5);
next.Previous.Value.Should().Be(5);
replacement.Previous.Should().Be(previous);
replacement.Next.Should().Be(next);
}
