public void WhenTwoNodesAreInsertedBefore_ThenValuesAreLinkedLIFO()
{
var firstNode = new DoublyLinkedNode <int>(1);
var secondValue = 2;
var thirdValue = 3;
firstNode.LinkBefore(thirdValue);
firstNode.LinkBefore(secondValue);
firstNode.Previous.Value.Should().Be(secondValue);
firstNode.Previous.Previous.Value.Should().Be(thirdValue);
}
public void WhenNodeIsInsertedBefore_TheNewNodeNextIsFirstNode()
{
var firstNode = new DoublyLinkedNode <int>(1);
var secondNode = firstNode.LinkBefore(2);
secondNode.Next.Should().Be(firstNode);
}
public void WhenNewNodeInsertedBefore_ThenFirstNodeHasNextReference()
{
var firstNode = new DoublyLinkedNode <int>(1);
var secondValue = 2;
firstNode.LinkBefore(secondValue);
firstNode.Previous.Value.Should().Be(secondValue);
}
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);
}