public void Test_CompareTo()
{
MyDeque <int> deq = new MyDeque <int>();
deq.EnqueueLast(1);
deq.EnqueueLast(2);
deq.EnqueueLast(3);
deq.EnqueueLast(4);
MyDeque <int> deq2 = new MyDeque <int>();
deq2.EnqueueFirst(2);
deq2.EnqueueFirst(2);
Assert.AreEqual(deq.CompareTo(deq2), 1);
deq2.EnqueueFirst(2);
deq2.EnqueueFirst(2);
Assert.AreEqual(deq.CompareTo(deq2), 0);
deq2.EnqueueFirst(2);
deq2.EnqueueFirst(2);
Assert.AreEqual(deq.CompareTo(deq2), -1);
}