public void InsertBeforeNonExistentElementThrowsException()
{
//Arrange
var l = new SingleLinkedList <int>();
l.AddLast(1);
l.AddLast(2);
l.AddLast(3);
l.AddLast(4);
//Act
//Assert
Assert.Throws <ArgumentException>(() => l.AddBeforeElement(9, 5));
}
public void InsertBeforeLastElement()
{
//Arrange
var l = new SingleLinkedList <int>();
l.AddLast(1);
l.AddLast(2);
l.AddLast(3);
l.AddLast(4);
//Act
l.AddBeforeElement(9, 4);
//Assert
Assert.AreEqual(l.Contains(9), true);
Assert.AreEqual(l.GetElementPosition(9), 4);
}