public void ExerciseQueueOperation()
{
var queue = new QueueViaLinkedList <int>();
queue.Enqueue(4);
queue.Enqueue(-1);
queue.Enqueue(2);
Assert.AreEqual(3, queue.Size);
Assert.AreEqual(4, queue.Peak());
Assert.AreEqual(4, queue.Dequeue());
Assert.AreEqual(-1, queue.Peak());
Assert.AreEqual(2, queue.Size);
queue.Enqueue(2);
queue.Enqueue(0);
queue.Enqueue(-9);
Assert.AreEqual(5, queue.Size);
Assert.AreEqual(-1, queue.Dequeue());
Assert.AreEqual(2, queue.Peak());
Assert.AreEqual(2, queue.Dequeue());
Assert.AreEqual(2, queue.Peak());
Assert.AreEqual(2, queue.Dequeue());
Assert.AreEqual(0, queue.Peak());
Assert.AreEqual(0, queue.Dequeue());
Assert.AreEqual(-9, queue.Peak());
Assert.AreEqual(-9, queue.Dequeue());
Assert.True(queue.IsEmpty());
Assert.AreEqual(0, queue.Size);
queue.Enqueue(0);
queue.Enqueue(-5);
queue.Enqueue(8);
Assert.AreEqual(3, queue.Size);
Assert.AreEqual(0, queue.Peak());
queue.Enqueue(-3);
queue.Enqueue(10);
Assert.AreEqual(5, queue.Size);
Assert.AreEqual(0, queue.Dequeue());
Assert.AreEqual(-5, queue.Peak());
Assert.AreEqual(-5, queue.Dequeue());
Assert.AreEqual(8, queue.Peak());
Assert.AreEqual(8, queue.Dequeue());
Assert.AreEqual(-3, queue.Peak());
Assert.AreEqual(-3, queue.Dequeue());
Assert.AreEqual(10, queue.Peak());
Assert.AreEqual(1, queue.Size);
queue.Enqueue(-1);
queue.Enqueue(1);
queue.Enqueue(2);
queue.Enqueue(5);
queue.Enqueue(7);
queue.Enqueue(10);
queue.Enqueue(0);
queue.Enqueue(9);
queue.Enqueue(11);
Assert.AreEqual(10, queue.Size);
}
public void ExceptionThrownOnPeakOnEmptyQueue()
{
var queue = new QueueViaLinkedList <int>();
Assert.Throws <IndexOutOfRangeException>(() => queue.Peak());
}