public void CheckIfAddBeforeWorksCorrectly()
{
var linkedList = new DataStructures.DoubleLinkedListCollection <int>();
linkedList.Add(1);
linkedList.Add(3);
linkedList.AddBefore(linkedList.Find(3), 2);
Assert.Equal(2, linkedList.Find(1).NextLink.Value);
}
public void CheckIfAddBeforeArgumentNullExceptionWorksCorrectly()
{
var linkedList = new DataStructures.DoubleLinkedListCollection <int>();
linkedList.Add(1);
linkedList.Add(2);
linkedList.Add(3);
Assert.Throws <ArgumentNullException>(() => linkedList.AddBefore(null, 2));
}
public void CheckIfAddBeforeExceptionReadOnlyWorksCorrectly()
{
var linkedList = new DataStructures.DoubleLinkedListCollection <int>();
linkedList.Add(1);
linkedList.Add(2);
linkedList.Add(3);
linkedList.MakeReadOnly();
Assert.Throws <NotSupportedException>(() => linkedList.AddBefore(linkedList.Find(3), 2));
}
public void CheckIfAddBeforeInvalidOperationExceptionWorksCorrectly()
{
var linkedList = new DataStructures.DoubleLinkedListCollection <int>();
linkedList.Add(1);
linkedList.Add(2);
linkedList.Add(3);
var newLink = new DataStructures.DoubleLink <int>(5);
Assert.Throws <InvalidOperationException>(() => linkedList.AddBefore(newLink, 2));
}
