public void Enqueue_From_Empty_Throws()
{
var queue = new CustomQueue.Queue <int>();
Should.Throw <InvalidOperationException>(() =>
{
var dequeuedValue = queue.Peek();
}
);
}
public void Peek_From_Empty_Throws_After_Enqueue()
{
var queue = new CustomQueue.Queue <int>();
queue.Enqueue(1);
queue.Dequeue();
Should.Throw <InvalidOperationException>(() =>
{
var poppedValue = queue.Peek();
}
);
}
public void Queue_Success_Cases(int[] testData)
{
var queue = new CustomQueue.Queue <int>();
for (var i = 0; i < testData.Length; i++)
{
queue.Count.ShouldBe(i, "The queue count is off");
queue.Enqueue(testData[i]);
queue.Count.ShouldBe(i + 1, "The queue count is off");
queue.Peek().ShouldBe(testData[0], "The recently pushed value is not peeking");
}
queue.Count.ShouldBe(testData.Length, "The end count was not as expected");
var counter = 0;
foreach (int value in queue)
{
value.ShouldBe(testData[counter], "The enumeration is not accurate");
counter++;
}
var expectedQueueSize = queue.Count;
for (var item = 0; item < testData.Length; item++)
{
var expected = testData[item];
queue.Peek().ShouldBe(expected, "The peeked value was not expected");
queue.Dequeue().ShouldBe(expected, "The dequeued value was not expected");
expectedQueueSize--;
queue.Count.ShouldBe(expectedQueueSize, "The dequeued value was not expected");
}
}