public void Can_Add_Before()
{
var myLinkedList = new MyLinkedList <int>();
myLinkedList.AddFirst(1);
myLinkedList.AddLast(3);
myLinkedList.AddLast(4);
myLinkedList.AddBefore(myLinkedList.GetHead().Next, 2);
myLinkedList.GetHead().Next.Data.Should().Be(2);
}