public void TestAccept()
{
Deque <int> d = new Deque <int>();
d.EnqueueHead(5);
d.EnqueueHead(3);
d.EnqueueHead(2);
TrackingVisitor <int> visitor = new TrackingVisitor <int>();
d.Accept(visitor);
Assert.AreEqual(visitor.TrackingList.Count, 3);
Assert.AreEqual(visitor.TrackingList.Contains(5), true);
Assert.AreEqual(visitor.TrackingList.Contains(3), true);
Assert.AreEqual(visitor.TrackingList.Contains(2), true);
}
public void TestNullVisitor()
{
Deque <int> d = new Deque <int>();
d.Accept(null);
}