public void EnqueueFrontTest()
{
for (int i = 0; i < 3; i++)
{
deque.Enqueue(i);
}
Assert.AreEqual("{0, 1, 2}", deque.ToString());
for (int i = 0; i < 3; i++)
{
deque.EnqueueFront(i);
}
Assert.AreEqual("{2, 1, 0, 0, 1, 2}", deque.ToString());
}