public void Constructor_AllParametersAreSet_ObjectIsInstantiated()
{
// Arrange
var systemInformationSender = new Mock<ISystemInformationSender>();
var workQueue = new Mock<IMessageQueue<SystemInformation>>();
var errorQueue = new Mock<IMessageQueue<SystemInformation>>();
// Act
var messageQueueWorker = new SystemInformationMessageQueueWorker(systemInformationSender.Object, workQueue.Object, errorQueue.Object);
// Assert
Assert.IsNotNull(messageQueueWorker);
}
public void Constructor_InitialStatusIsStopped()
{
// Arrange
var systemInformationSender = new Mock<ISystemInformationSender>();
var workQueue = new Mock<IMessageQueue<SystemInformation>>();
workQueue.Setup(w => w.Dequeue()).Returns(new SystemInformationQueueItem(new SystemInformation()));
var errorQueue = new Mock<IMessageQueue<SystemInformation>>();
// Act
using (var messageQueueWorker = new SystemInformationMessageQueueWorker(systemInformationSender.Object, workQueue.Object, errorQueue.Object))
{
// Assert
Assert.AreEqual(ServiceStatus.Stopped, messageQueueWorker.GetStatus());
}
}
public void WorkerIsStarted_QueueIsEmpty_WorkerKeepsPollingForItemsInQueue()
{
// Arrange
int maxRuntime = SystemInformationMessageQueueWorker.WorkIntervalInMilliseconds * 5;
var workQueue = new Mock<IMessageQueue<SystemInformation>>();
workQueue.Setup(q => q.IsEmpty()).Returns(true);
SystemInformationQueueItem queueItem = null;
workQueue.Setup(q => q.Dequeue()).Returns(queueItem);
var errorQueue = new Mock<IMessageQueue<SystemInformation>>();
var systemInformationSender = new Mock<ISystemInformationSender>();
using (var messageQueueWorker = new SystemInformationMessageQueueWorker(systemInformationSender.Object, workQueue.Object, errorQueue.Object))
{
// Act
var worker = new Task(messageQueueWorker.Start);
worker.Start();
Task.WaitAll(new[] { worker }, maxRuntime);
messageQueueWorker.Stop();
// Assert
workQueue.Verify(q => q.Dequeue(), Times.Between(4, 5, Range.Inclusive));
}
}
public void WorkerIsStarted_QueueIsEmpty_SendIsNotCalled()
{
// Arrange
int maxRuntime = SystemInformationMessageQueueWorker.WorkIntervalInMilliseconds * 2;
var workQueue = new Mock<IMessageQueue<SystemInformation>>();
workQueue.Setup(q => q.IsEmpty()).Returns(true);
SystemInformationQueueItem queueItem = null;
workQueue.Setup(q => q.Dequeue()).Returns(queueItem);
var errorQueue = new Mock<IMessageQueue<SystemInformation>>();
var systemInformationSender = new Mock<ISystemInformationSender>();
var messageQueueWorker = new SystemInformationMessageQueueWorker(systemInformationSender.Object, workQueue.Object, errorQueue.Object);
// Act
var worker = new Task(messageQueueWorker.Start);
worker.Start();
Task.WaitAll(new[] { worker }, maxRuntime);
messageQueueWorker.Stop();
// Assert
systemInformationSender.Verify(s => s.Send(It.IsAny<SystemInformation>()), Times.Never());
}
public void Stop_StatusIsChangedToStopped()
{
// Arrange
var systemInformationSender = new Mock<ISystemInformationSender>();
var workQueue = new Mock<IMessageQueue<SystemInformation>>();
workQueue.Setup(w => w.Dequeue()).Returns(new SystemInformationQueueItem(new SystemInformation()));
var errorQueue = new Mock<IMessageQueue<SystemInformation>>();
using (var messageQueueWorker = new SystemInformationMessageQueueWorker(systemInformationSender.Object, workQueue.Object, errorQueue.Object))
{
var workerTaks = new Task(messageQueueWorker.Start);
workerTaks.Start();
Thread.Sleep(500);
// Act
messageQueueWorker.Stop();
Thread.Sleep(500);
// Assert
Assert.AreEqual(ServiceStatus.Stopped, messageQueueWorker.GetStatus());
}
}
public void Stop_ServiceIsNotStartet_StatusIsNotChanged()
{
// Arrange
var systemInformationSender = new Mock<ISystemInformationSender>();
var workQueue = new Mock<IMessageQueue<SystemInformation>>();
workQueue.Setup(w => w.Dequeue()).Returns(new SystemInformationQueueItem(new SystemInformation()));
var errorQueue = new Mock<IMessageQueue<SystemInformation>>();
using (var messageQueueWorker = new SystemInformationMessageQueueWorker(systemInformationSender.Object, workQueue.Object, errorQueue.Object))
{
var statusBefore = messageQueueWorker.GetStatus();
// Act
messageQueueWorker.Stop();
var statusAfter = messageQueueWorker.GetStatus();
// Assert
Assert.AreEqual(statusBefore, statusAfter);
}
}
public void Stop_EndsTheWorkerLoop()
{
// Arrange
int timeToWaitBeforeStop = SystemInformationMessageQueueWorker.WorkIntervalInMilliseconds * 5;
var workQueue = new Mock<IMessageQueue<SystemInformation>>();
workQueue.Setup(q => q.IsEmpty()).Returns(true);
SystemInformationQueueItem queueItem = null;
workQueue.Setup(q => q.Dequeue()).Returns(queueItem);
var errorQueue = new Mock<IMessageQueue<SystemInformation>>();
var systemInformationSender = new Mock<ISystemInformationSender>();
using (var messageQueueWorker = new SystemInformationMessageQueueWorker(systemInformationSender.Object, workQueue.Object, errorQueue.Object))
{
// Act
var stopwatch = new Stopwatch();
stopwatch.Start();
var worker = new Task(messageQueueWorker.Start);
worker.Start();
Thread.Sleep(timeToWaitBeforeStop);
messageQueueWorker.Stop();
Task.WaitAll(new[] { worker }, timeToWaitBeforeStop);
stopwatch.Stop();
// Assert
Assert.LessOrEqual(stopwatch.ElapsedMilliseconds - timeToWaitBeforeStop, SystemInformationMessageQueueWorker.WorkIntervalInMilliseconds + 100);
}
}
public void Start_RunFor3Intervals_SendIsCalledAtLeastTwoTimes()
{
// Arrange
int durationInMilliseconds = SystemInformationMessageQueueWorker.WorkIntervalInMilliseconds * 3;
var systemInformationSender = new Mock<ISystemInformationSender>();
var workQueue = new Mock<IMessageQueue<SystemInformation>>();
workQueue.Setup(w => w.Dequeue()).Returns(new SystemInformationQueueItem(new SystemInformation()));
var errorQueue = new Mock<IMessageQueue<SystemInformation>>();
using (var messageQueueWorker = new SystemInformationMessageQueueWorker(systemInformationSender.Object, workQueue.Object, errorQueue.Object))
{
// Act
var workerTaks = new Task(messageQueueWorker.Start);
workerTaks.Start();
Task.WaitAll(new[] { workerTaks }, durationInMilliseconds);
// Assert
systemInformationSender.Verify(s => s.Send(It.IsAny<SystemInformation>()), Times.AtLeast(2));
}
}
public void GetStatus_ServiceIsStarted_ResultIsRunning()
{
// Arrange
var systemInformationSender = new Mock<ISystemInformationSender>();
var workQueue = new Mock<IMessageQueue<SystemInformation>>();
workQueue.Setup(w => w.Dequeue()).Returns(new SystemInformationQueueItem(new SystemInformation()));
var errorQueue = new Mock<IMessageQueue<SystemInformation>>();
using (var messageQueueWorker = new SystemInformationMessageQueueWorker(systemInformationSender.Object, workQueue.Object, errorQueue.Object))
{
var workerTaks = new Task(messageQueueWorker.Start);
workerTaks.Start();
Thread.Sleep(500);
// Act
var status = messageQueueWorker.GetStatus();
// Assert
Assert.AreEqual(ServiceStatus.Running, status);
}
}
public void QueueIsFilled_SendCausesFatalException_WorkerStops()
{
// Arrange
int maxRuntime = SystemInformationMessageQueueWorker.WorkIntervalInMilliseconds * 2;
var workQueue = new Mock<IMessageQueue<SystemInformation>>();
workQueue.Setup(q => q.IsEmpty()).Returns(false);
workQueue.Setup(q => q.Dequeue()).Returns(
() => new SystemInformationQueueItem(new SystemInformation { MachineName = Environment.MachineName, Timestamp = DateTime.UtcNow }));
var errorQueue = new Mock<IMessageQueue<SystemInformation>>();
var systemInformationSender = new Mock<ISystemInformationSender>();
systemInformationSender.Setup(s => s.Send(It.IsAny<SystemInformation>())).Throws(new FatalSystemInformationSenderException("Some fatal exception."));
using (var messageQueueWorker = new SystemInformationMessageQueueWorker(systemInformationSender.Object, workQueue.Object, errorQueue.Object))
{
// Act
var stopwatch = new Stopwatch();
stopwatch.Start();
var worker = new Task(messageQueueWorker.Start);
worker.Start();
Task.WaitAll(new[] { worker }, maxRuntime);
stopwatch.Stop();
// Assert
Assert.LessOrEqual(stopwatch.ElapsedMilliseconds, maxRuntime);
}
}
public void QueueIsFilled_SendCausesFatalException_AllItemsInQueueAreMovedToTheFailedRequestQueue()
{
// Arrange
var workQueue = new Mock<IMessageQueue<SystemInformation>>();
workQueue.Setup(q => q.IsEmpty()).Returns(false);
workQueue.Setup(q => q.Dequeue()).Returns(
() => new SystemInformationQueueItem(new SystemInformation { MachineName = Environment.MachineName, Timestamp = DateTime.UtcNow }));
var items = new[]
{
new SystemInformationQueueItem(new SystemInformation { MachineName = Environment.MachineName + "1", Timestamp = DateTime.UtcNow }),
new SystemInformationQueueItem(new SystemInformation { MachineName = Environment.MachineName + "2", Timestamp = DateTime.UtcNow }),
new SystemInformationQueueItem(new SystemInformation { MachineName = Environment.MachineName + "3", Timestamp = DateTime.UtcNow })
};
workQueue.Setup(q => q.PurgeAllItems()).Returns(items);
var errorQueue = new Mock<IMessageQueue<SystemInformation>>();
var systemInformationSender = new Mock<ISystemInformationSender>();
systemInformationSender.Setup(s => s.Send(It.IsAny<SystemInformation>())).Throws(new FatalSystemInformationSenderException("Some fatal exception."));
using (var messageQueueWorker = new SystemInformationMessageQueueWorker(systemInformationSender.Object, workQueue.Object, errorQueue.Object))
{
// Act
messageQueueWorker.Start();
// Assert
errorQueue.Verify(q => q.Enqueue(items), Times.Once());
}
}
public void QueueIsFilled_SendCausesExceptionWhichJustifiesARetry_RetryCountHasNotBeenExceeded_ItemIsAddedToQueue()
{
// Arrange
int maxRuntime = SystemInformationMessageQueueWorker.WorkIntervalInMilliseconds * 2;
var workQueue = new Mock<IMessageQueue<SystemInformation>>();
workQueue.Setup(q => q.IsEmpty()).Returns(false);
bool itemHasBeenAccessed = false;
var systemInfo = new SystemInformation { MachineName = Environment.MachineName, Timestamp = DateTime.UtcNow };
var queueItem = new SystemInformationQueueItem(systemInfo);
workQueue.Setup(q => q.Dequeue()).Returns(() =>
{
if (!itemHasBeenAccessed)
{
itemHasBeenAccessed = true;
return queueItem;
}
return null;
});
var errorQueue = new Mock<IMessageQueue<SystemInformation>>();
var systemInformationSender = new Mock<ISystemInformationSender>();
systemInformationSender.Setup(s => s.Send(systemInfo)).Throws(
new SendSystemInformationFailedException("Some minor exception which justifies a retry", null));
using (var messageQueueWorker = new SystemInformationMessageQueueWorker(systemInformationSender.Object, workQueue.Object, errorQueue.Object))
{
// Act
var worker = new Task(messageQueueWorker.Start);
worker.Start();
Task.WaitAll(new[] { worker }, maxRuntime);
// Assert
workQueue.Verify(q => q.Enqueue(It.IsAny<SystemInformationQueueItem>()), Times.Once());
}
}
public void QueueIsFilled_EveryItemInQueueIsSent()
{
// Arrange
int maxRuntime = SystemInformationMessageQueueWorker.WorkIntervalInMilliseconds * 5;
var workQueue = new Mock<IMessageQueue<SystemInformation>>();
workQueue.Setup(q => q.IsEmpty()).Returns(false);
int maxCount = 3;
int itemIndex = 1;
workQueue.Setup(q => q.Dequeue()).Returns(() =>
{
if (itemIndex <= maxCount)
{
itemIndex++;
return new SystemInformationQueueItem(new SystemInformation { MachineName = itemIndex.ToString(), Timestamp = DateTime.UtcNow });
}
return null;
});
var errorQueue = new Mock<IMessageQueue<SystemInformation>>();
var systemInformationSender = new Mock<ISystemInformationSender>();
using (var messageQueueWorker = new SystemInformationMessageQueueWorker(systemInformationSender.Object, workQueue.Object, errorQueue.Object))
{
// Act
var worker = new Task(messageQueueWorker.Start);
worker.Start();
Task.WaitAll(new[] { worker }, maxRuntime);
// Assert
systemInformationSender.Verify(s => s.Send(It.IsAny<SystemInformation>()), Times.Exactly(maxCount));
}
}
public void Pause_RunFor6Intervals_PauseIsCalledAfter3Intervals_SendIsCalledAtMostThreeTimes()
{
// Arrange
int durationInMilliseconds = SystemInformationMessageQueueWorker.WorkIntervalInMilliseconds * 6;
var systemInformationSender = new Mock<ISystemInformationSender>();
var workQueue = new Mock<IMessageQueue<SystemInformation>>();
workQueue.Setup(w => w.Dequeue()).Returns(new SystemInformationQueueItem(new SystemInformation()));
var errorQueue = new Mock<IMessageQueue<SystemInformation>>();
using (var messageQueueWorker = new SystemInformationMessageQueueWorker(systemInformationSender.Object, workQueue.Object, errorQueue.Object))
{
// Act
var workerTaks = new Task(messageQueueWorker.Start);
workerTaks.Start();
Thread.Sleep(durationInMilliseconds / 2);
messageQueueWorker.Pause();
// Assert
systemInformationSender.Verify(s => s.Send(It.IsAny<SystemInformation>()), Times.AtMost(3));
}
}
public void Resume_ServiceIsRunning_StatusIsNotChanged()
{
// Arrange
var systemInformationSender = new Mock<ISystemInformationSender>();
var workQueue = new Mock<IMessageQueue<SystemInformation>>();
workQueue.Setup(w => w.Dequeue()).Returns(new SystemInformationQueueItem(new SystemInformation()));
var errorQueue = new Mock<IMessageQueue<SystemInformation>>();
using (var messageQueueWorker = new SystemInformationMessageQueueWorker(systemInformationSender.Object, workQueue.Object, errorQueue.Object))
{
var workerTaks = new Task(messageQueueWorker.Start);
workerTaks.Start();
Thread.Sleep(500);
var statusBeforeResume = messageQueueWorker.GetStatus();
// Act
messageQueueWorker.Resume();
Thread.Sleep(500);
var statusAfterResume = messageQueueWorker.GetStatus();
// Assert
Assert.AreEqual(statusBeforeResume, statusAfterResume);
}
}
public void RunFor10Seconds_SendFailsForAllItems_DispatcherStopsOnlyIfTheQueueIsEmptyAndAllRetryAttempsHaveFailed()
{
// Arrange
int runtimeInMilliseconds = 10 * 1000;
int itemsReturnedFromSystemInformationProvider = 0;
int attemptsToSend = 0;
// prepare system information provider
var provider = new Mock<ISystemInformationProvider>();
provider.Setup(p => p.GetSystemInfo()).Returns(() =>
{
itemsReturnedFromSystemInformationProvider++;
return new SystemInformation { MachineName = Environment.MachineName, Timestamp = DateTime.UtcNow };
});
// prepare sender
var sender = new Mock<ISystemInformationSender>();
sender.Setup(s => s.Send(It.IsAny<SystemInformation>())).Callback(() => { attemptsToSend++; }).Throws(new SendSystemInformationFailedException("Send failed.", null));
IMessageQueue<SystemInformation> workQueue = new SystemInformationMessageQueue();
IMessageQueue<SystemInformation> errorQueue = new SystemInformationMessageQueue();
IMessageQueueProvider<SystemInformation> messageQueueProvider = new SystemInformationMessageQueueProvider(workQueue, errorQueue);
IMessageQueueFeeder messageQueueFeeder = new SystemInformationMessageQueueFeeder(provider.Object, workQueue);
IMessageQueueWorker messageQueueWorker = new SystemInformationMessageQueueWorker(sender.Object, workQueue, errorQueue);
var agentCoordinationService = new Mock<IAgentCoordinationService>();
var agentCoordinationServiceFactory = new Mock<IAgentCoordinationServiceFactory>();
agentCoordinationServiceFactory.Setup(f => f.GetAgentCoordinationService(It.IsAny<Action>(), It.IsAny<Action>())).Returns(
agentCoordinationService.Object);
var messageQueueFeederFactory = new Mock<IMessageQueueFeederFactory>();
messageQueueFeederFactory.Setup(f => f.GetMessageQueueFeeder()).Returns(messageQueueFeeder);
var messageQueueWorkerFactory = new Mock<IMessageQueueWorkerFactory>();
messageQueueWorkerFactory.Setup(f => f.GetMessageQueueWorker()).Returns(messageQueueWorker);
IMessageQueuePersistence<SystemInformation> messageQueuePersistence =
new JSONSystemInformationMessageQueuePersistence(this.jsonMessageQueuePersistenceConfigurationProvider, this.encodingProvider);
var systemInformationDispatchingService = new SystemInformationDispatchingService(
agentCoordinationServiceFactory.Object,
messageQueueFeederFactory.Object,
messageQueueWorkerFactory.Object,
messageQueueProvider,
messageQueuePersistence);
// Act
var stopwatch = new Stopwatch();
stopwatch.Start();
var dispatcher = new Task(systemInformationDispatchingService.Start);
dispatcher.Start();
Thread.Sleep(runtimeInMilliseconds);
systemInformationDispatchingService.Stop();
Task.WaitAll(new[] { dispatcher });
stopwatch.Stop();
// Assert
int queueSize = workQueue.GetSize();
Console.WriteLine(
"After a runtime of {0} milliseconds the dispatcher has been stopped with {1} items in queue. It took {2} milliseconds until the queue worker stopped sending out all queue items (Attempts To Send: {3}).",
runtimeInMilliseconds,
itemsReturnedFromSystemInformationProvider,
stopwatch.ElapsedMilliseconds,
attemptsToSend);
Assert.AreEqual(0, queueSize);
}
public void Dispose_ServiceIsStopped()
{
// Arrange
var maxWaitTime = SystemInformationMessageQueueWorker.WorkIntervalInMilliseconds * 3;
var systemInformationSender = new Mock<ISystemInformationSender>();
var workQueue = new Mock<IMessageQueue<SystemInformation>>();
workQueue.Setup(w => w.IsEmpty()).Returns(true);
var errorQueue = new Mock<IMessageQueue<SystemInformation>>();
var messageQueueWorker = new SystemInformationMessageQueueWorker(systemInformationSender.Object, workQueue.Object, errorQueue.Object);
var workerTaks = new Task(messageQueueWorker.Start);
workerTaks.Start();
Thread.Sleep(500);
// Act
messageQueueWorker.Dispose();
Task.WaitAll(new[] { workerTaks }, maxWaitTime);
// Assert
Assert.AreEqual(ServiceStatus.Stopped, messageQueueWorker.GetStatus());
}