public void TestCompareTo()
{
VisitableLinkedList <int> l1 = new VisitableLinkedList <int>();
l1.AddFirst(5);
VisitableLinkedList <int> l2 = new VisitableLinkedList <int>();
l2.AddFirst(3);
l2.AddFirst(4);
Assert.AreEqual(l1.CompareTo(l2), -1);
Assert.AreEqual(l2.CompareTo(l1), 1);
Assert.AreEqual(l1.CompareTo(l1), 0);
object o = new object();
Assert.AreEqual(l1.CompareTo(o), -1);
}
public void TestInvalidCompareTo()
{
VisitableLinkedList <string> l = new VisitableLinkedList <string>();
l.CompareTo(null);
}