public void Change_Tail_Changes_Tail()
{
var newTail = A.Fake <IListNode <int> >();
var sut = new ListNode <int>(1, A.Fake <IListNode <int> >());
var result = sut.ChangeTail(newTail);
Assert.That(result.Value, Is.EqualTo(sut.Value));
Assert.That(result.Tail, Is.EqualTo(newTail));
}
