public void Works()
 {
     var q = new FixedSizeQueue<int>(2);
     q.Enqueue(1);
     Assert.AreEqual("(1)", q.Print());
     q.Enqueue(2);
     Assert.AreEqual("(1,2)", q.Print());
     q.Enqueue(3);
     Assert.AreEqual("(2,3)", q.Print());
 }