public void SetMaximumWorkerThreadsCountShouldAddNoWorkerThreadsToReachTheMaximumThreadCountWhenMaximumThreadsCountIncreasesAndThereAreWorkItemsInTheQueue()
{
ManualFinishWorkItemQueueStub manualFinishWorkItemQueueStub = new ManualFinishWorkItemQueueStub();
manualFinishWorkItemQueueStub.Enqueue(new ManualFinishWorkItem());
manualFinishWorkItemQueueStub.Enqueue(new ManualFinishWorkItem());
WorkerThreadPool workerThreadPool = new WorkerThreadPool(manualFinishWorkItemQueueStub, 1, 2);
manualFinishWorkItemQueueStub.WaitAllStart(500);
Assert.AreEqual(2, workerThreadPool.WorkerThreadsCount);
Assert.AreEqual(2, workerThreadPool.WorkerThreads.Count(x => x.IsBusy));
workerThreadPool.QueueWorkItem(new ManualFinishWorkItem());
workerThreadPool.QueueWorkItem(new ManualFinishWorkItem());
Assert.AreEqual(2, workerThreadPool.WorkerThreadsCount);
Assert.AreEqual(2, workerThreadPool.WorkerThreads.Count(x => x.IsBusy));
Assert.AreEqual(2, manualFinishWorkItemQueueStub.Count);
workerThreadPool.SetMaximumWorkerThreadsCount(4);
manualFinishWorkItemQueueStub.WaitAllStart(500);
Assert.AreEqual(4, workerThreadPool.WorkerThreadsCount);
Assert.AreEqual(4, workerThreadPool.WorkerThreads.Count(x => x.IsBusy));
Assert.AreEqual(0, manualFinishWorkItemQueueStub.Count);
manualFinishWorkItemQueueStub.StopAll();
workerThreadPool.Shutdown(true, 500);
}
public void QueueWorkItemShouldAddANewWorkerThreadWhenMaxThreadCountIsNotReached()
{
ManualFinishWorkItemQueueStub workItemQueue = new ManualFinishWorkItemQueueStub();
workItemQueue.Enqueue(new ManualFinishWorkItem());
WorkerThreadPool workerThreadPool = new WorkerThreadPool(workItemQueue, 0, 2);
Assert.AreEqual(1, workerThreadPool.WorkerThreadsCount);
workItemQueue.WaitAllStart(500);
Assert.AreEqual(1, workerThreadPool.WorkerThreadsCount);
ManualFinishWorkItem newWorkItem = new ManualFinishWorkItem();
workerThreadPool.QueueWorkItem(newWorkItem);
newWorkItem.WaitStart(500);
Assert.AreEqual(2, workerThreadPool.WorkerThreadsCount);
Assert.AreEqual(2, workerThreadPool.WorkerThreads.Count(x => x.IsBusy));
workItemQueue.StopAll();
workerThreadPool.Shutdown(true, 500);
}
public void ConstructorShouldCreateOptimumWorkerThreadsWhenThereAreWorkItemsInTheQueue()
{
ManualFinishWorkItemQueueStub workItemQueue = new ManualFinishWorkItemQueueStub();
for (int i = 0; i < 5; i++)
{
workItemQueue.Enqueue(new ManualFinishWorkItem());
}
ManualResetEvent manualResetEvent = new ManualResetEvent(false);
int exitedWorkerThreadCount = 0;
WorkerThreadPool workerThreadPool = new WorkerThreadPool(workItemQueue, 2, 4);
workerThreadPool.WorkerThreadExiting += (sender, args) =>
{
if (Interlocked.Increment(ref exitedWorkerThreadCount) >= 2)
{
manualResetEvent.Set();
}
};
workItemQueue.WaitAllStart(500);
Assert.AreEqual(4, workerThreadPool.WorkerThreadsCount);
Assert.AreEqual(4, workerThreadPool.WorkerThreads.Count(x => x.IsBusy));
workItemQueue.StopAll();
manualResetEvent.WaitOne(500);
Assert.AreEqual(2, workerThreadPool.WorkerThreadsCount);
Assert.AreEqual(0, workerThreadPool.WorkerThreads.Count(x => x.IsBusy));
workerThreadPool.Shutdown(true, 500);
}
public void SetMaximumWorkerThreadsCountShouldRemoveWorkerThreadsWhenMaximumThreadsCountDecreases()
{
ManualFinishWorkItemQueueStub manualFinishWorkItemQueueStub = new ManualFinishWorkItemQueueStub();
manualFinishWorkItemQueueStub.Enqueue(new ManualFinishWorkItem());
manualFinishWorkItemQueueStub.Enqueue(new ManualFinishWorkItem());
manualFinishWorkItemQueueStub.Enqueue(new ManualFinishWorkItem());
AutoResetEvent autoResetEvent = new AutoResetEvent(false);
WorkerThreadPool workerThreadPool = new WorkerThreadPool(manualFinishWorkItemQueueStub, 1, 3);
workerThreadPool.WorkerThreadExiting += (sender, args) => { autoResetEvent.Set(); };
manualFinishWorkItemQueueStub.WaitAllStart(500);
Assert.AreEqual(3, workerThreadPool.WorkerThreadsCount);
Assert.AreEqual(3, workerThreadPool.WorkerThreads.Count(x => x.IsBusy));
workerThreadPool.SetMaximumWorkerThreadsCount(2);
manualFinishWorkItemQueueStub.WorkItems[0].Stop();
manualFinishWorkItemQueueStub.Enqueue(new ManualFinishWorkItem());
autoResetEvent.WaitOne(500);
Assert.AreEqual(2, workerThreadPool.WorkerThreadsCount);
Assert.AreEqual(2, workerThreadPool.WorkerThreads.Count(x => x.IsBusy));
manualFinishWorkItemQueueStub.WorkItems[1].Stop();
autoResetEvent.WaitOne(500);
Assert.AreEqual(2, workerThreadPool.WorkerThreadsCount);
Assert.AreEqual(2, workerThreadPool.WorkerThreads.Count(x => x.IsBusy));
manualFinishWorkItemQueueStub.WorkItems[2].Stop();
autoResetEvent.WaitOne(500);
Assert.AreEqual(1, workerThreadPool.WorkerThreadsCount);
Assert.AreEqual(1, workerThreadPool.WorkerThreads.Count(x => x.IsBusy));
manualFinishWorkItemQueueStub.WorkItems[3].Stop();
autoResetEvent.WaitOne(500);
Assert.AreEqual(1, workerThreadPool.WorkerThreadsCount);
Assert.AreEqual(0, workerThreadPool.WorkerThreads.Count(x => x.IsBusy));
manualFinishWorkItemQueueStub.StopAll();
workerThreadPool.Shutdown(true, 500);
}
public void SetMinimumWorkerThreadsCountShouldNotAddWorkerThreadsWhenMinimumThreadsCountIncreasesAndThereIsWorkItemsInTheQueue()
{
ManualFinishWorkItemQueueStub manualFinishWorkItemQueueStub = new ManualFinishWorkItemQueueStub();
manualFinishWorkItemQueueStub.Enqueue(new ManualFinishWorkItem());
manualFinishWorkItemQueueStub.Enqueue(new ManualFinishWorkItem());
manualFinishWorkItemQueueStub.Enqueue(new ManualFinishWorkItem());
manualFinishWorkItemQueueStub.Enqueue(new ManualFinishWorkItem());
manualFinishWorkItemQueueStub.Enqueue(new ManualFinishWorkItem());
ManualResetEvent manualResetEvent = new ManualResetEvent(false);
int exitedWorkerThreadCount = 0;
WorkerThreadPool workerThreadPool = new WorkerThreadPool(manualFinishWorkItemQueueStub, 2, 4);
workerThreadPool.WorkerThreadExiting += (sender, args) =>
{
if (Interlocked.Increment(ref exitedWorkerThreadCount) >= 1)
{
manualResetEvent.Set();
}
};
manualFinishWorkItemQueueStub.WaitAllStart(500);
Assert.AreEqual(4, workerThreadPool.WorkerThreadsCount);
Assert.AreEqual(4, workerThreadPool.WorkerThreads.Count(x => x.IsBusy));
Assert.AreEqual(1, manualFinishWorkItemQueueStub.Count);
workerThreadPool.SetMinimumWorkerThreadsCount(3);
Assert.AreEqual(4, workerThreadPool.WorkerThreadsCount);
Assert.AreEqual(4, workerThreadPool.WorkerThreads.Count(x => x.IsBusy));
Assert.AreEqual(1, manualFinishWorkItemQueueStub.Count);
manualFinishWorkItemQueueStub.StopAll();
manualResetEvent.WaitOne();
Assert.AreEqual(3, workerThreadPool.WorkerThreadsCount);
Assert.AreEqual(0, workerThreadPool.WorkerThreads.Count(x => x.IsBusy));
workerThreadPool.Shutdown(true, 500);
}
public void SetMaximumWorkerThreadsCountShouldAddNoNewWorkerThreadWhenMaxThreadCountIncreasedAndThereIsNoWorkItemsInTheQueue()
{
ManualFinishWorkItemQueueStub workItemQueue = new ManualFinishWorkItemQueueStub();
workItemQueue.Enqueue(new ManualFinishWorkItem());
WorkerThreadPool workerThreadPool = new WorkerThreadPool(workItemQueue, 0, 1);
Assert.AreEqual(1, workerThreadPool.WorkerThreadsCount);
workItemQueue.WaitAllStart(500);
workerThreadPool.SetMaximumWorkerThreadsCount(2);
Assert.AreEqual(1, workerThreadPool.WorkerThreadsCount);
Assert.AreEqual(1, workerThreadPool.WorkerThreads.Count(x => x.IsBusy));
workItemQueue.StopAll();
workerThreadPool.Shutdown(true, 500);
}
public void SetMaximumWorkerThreadsCountShouldRemoveIdleWorkerThreadsWhenDecreased()
{
ManualFinishWorkItemQueueStub workItemQueue = new ManualFinishWorkItemQueueStub();
workItemQueue.Enqueue(new ManualFinishWorkItem());
workItemQueue.Enqueue(new ManualFinishWorkItem());
ManualResetEvent manualResetEvent = new ManualResetEvent(false);
WorkerThreadPool workerThreadPool = new WorkerThreadPool(workItemQueue, 0, 2);
workerThreadPool.WorkerThreadExiting += (sender, args) =>
{
manualResetEvent.Set();
};
workItemQueue.WaitAllStart(500);
Assert.AreEqual(2, workerThreadPool.WorkerThreadsCount);
Assert.AreEqual(2, workerThreadPool.WorkerThreads.Count(x => x.IsBusy));
workerThreadPool.SetMaximumWorkerThreadsCount(1);
Assert.AreEqual(2, workerThreadPool.WorkerThreadsCount);
Assert.AreEqual(2, workerThreadPool.WorkerThreads.Count(x => x.IsBusy));
workItemQueue.WorkItems[0].Stop();
workItemQueue.Enqueue(new ManualFinishWorkItem());
Assert.AreEqual(1, workItemQueue.Count);
manualResetEvent.WaitOne(300);
Assert.AreEqual(1, workerThreadPool.WorkerThreadsCount);
Assert.AreEqual(1, workerThreadPool.WorkerThreads.Count(x => x.IsBusy));
workItemQueue.StopAll();
workerThreadPool.Shutdown(true, 500);
}