public void EnqueueDequeueHead()
{
var deque = new Deque<int>();
Assert.That(() => deque.DequeueHead(), Throws.TypeOf<InvalidOperationException>());
deque.EnqueueHead(1);
Assert.AreEqual(1, deque.Count);
Assert.AreEqual(1, deque.DequeueHead());
Assert.AreEqual(0, deque.Count);
deque = new Deque<int>(new[] { 2, 3, 4 });
Assert.AreEqual(2, deque.DequeueHead());
deque.EnqueueHead(0);
Assert.AreEqual(3, deque.Count);
Assert.AreEqual(0, deque.DequeueHead());
Assert.AreEqual(2, deque.Count);
}
public void Tail()
{
var deque = new Deque<int>();
Assert.That(() => { int i = deque.Tail; }, Throws.TypeOf<InvalidOperationException>());
Assert.That(() => { deque.Tail = 0; }, Throws.TypeOf<InvalidOperationException>());
deque.EnqueueHead(123);
Assert.AreEqual(123, deque.Tail);
deque.EnqueueTail(234);
Assert.AreEqual(234, deque.Tail);
deque.EnqueueHead(345);
Assert.AreEqual(234, deque.Tail);
deque.Tail = 1;
Assert.AreEqual(1, deque.Tail);
deque.DequeueHead();
Assert.AreEqual(1, deque.Tail);
deque.DequeueTail();
Assert.AreEqual(123, deque.Head);
}
public void Count()
{
var deque = new Deque<int>();
Assert.AreEqual(0, deque.Count);
deque.EnqueueHead(1);
deque.EnqueueHead(0);
deque.EnqueueTail(2);
deque.EnqueueTail(3);
deque.EnqueueTail(4);
deque.DequeueHead();
deque.DequeueTail();
Assert.AreEqual(3, deque.Count);
deque.Clear();
Assert.AreEqual(0, deque.Count);
}