public void EnqueueTrySignalMethodShouldNotBeCalledWhenWaitingStackIsEmpty()
{
IWorkItemWaiterEntry workItemWaiterEntry = Substitute.For <IWorkItemWaiterEntry>();
IWorkItemWaiterEntryStack workItemWaiterEntryStack = Substitute.For <IWorkItemWaiterEntryStack>();
workItemWaiterEntryStack.Count.Returns(0);
WorkItemQueue workItemQueue = new WorkItemQueue(1 * 1000, workItemWaiterEntryStack);
IWorkItem workItem = Substitute.For <IWorkItem>();
workItemQueue.Enqueue(workItem);
workItemWaiterEntry.DidNotReceiveWithAnyArgs().TrySignal(workItem);
}
