public async Task SimulatedListenLoop_WhenThrottlingDoesNotOccur_DoNotCallMessageMonitor(int messageCount, int capacity)
{
Assert.That(messageCount, Is.LessThanOrEqualTo(capacity), "To avoid throttling, message count must be not be over capacity");
var fakeMonitor = Substitute.For <IMessageMonitor>();
var messageProcessingStrategy = new Throttled(capacity, fakeMonitor);
var counter = new ThreadSafeCounter();
var actions = BuildFakeIncomingMessages(messageCount, counter);
await ListenLoopExecuted(actions, messageProcessingStrategy);
fakeMonitor.DidNotReceive().IncrementThrottlingStatistic();
}
public async Task SimulatedListenLoop_WhenThrottlingOccurs_CallsMessageMonitor(int messageCount, int capacity)
{
Assert.That(messageCount, Is.GreaterThan(capacity), "To cause throttling, message count must be over capacity");
var fakeMonitor = Substitute.For<IMessageMonitor>();
var messageProcessingStrategy = new Throttled(capacity, fakeMonitor);
var counter = new ThreadSafeCounter();
var actions = BuildFakeIncomingMessages(messageCount, counter);
await ListenLoopExecuted(actions, messageProcessingStrategy);
fakeMonitor.Received().IncrementThrottlingStatistic();
fakeMonitor.Received().HandleThrottlingTime(Arg.Any<long>());
}
public async Task SimulatedListenLoop_WhenThrottlingOccurs_CallsMessageMonitor(int messageCount, int capacity)
{
Assert.That(messageCount, Is.GreaterThan(capacity), "To cause throttling, message count must be over capacity");
var fakeMonitor = Substitute.For <IMessageMonitor>();
var messageProcessingStrategy = new Throttled(capacity, fakeMonitor);
var counter = new ThreadSafeCounter();
var actions = BuildFakeIncomingMessages(messageCount, counter);
await ListenLoopExecuted(actions, messageProcessingStrategy);
fakeMonitor.Received().IncrementThrottlingStatistic();
fakeMonitor.Received().HandleThrottlingTime(Arg.Any <long>());
}
public async Task SimulatedListenLoop_ProcessedAllMessages(int numberOfMessagesToProcess)
{
var fakeMonitor = Substitute.For<IMessageMonitor>();
var messageProcessingStrategy = new Throttled(ConcurrencyLevel, fakeMonitor);
var counter = new ThreadSafeCounter();
var watch = new Stopwatch();
watch.Start();
var actions = BuildFakeIncomingMessages(numberOfMessagesToProcess, counter);
await ListenLoopExecuted(actions, messageProcessingStrategy);
watch.Stop();
await Task.Yield();
await Task.Delay(2000);
await Task.Yield();
Assert.That(counter.Count, Is.EqualTo(numberOfMessagesToProcess));
}
public async Task SimulatedListenLoop_ProcessedAllMessages(int numberOfMessagesToProcess)
{
var fakeMonitor = Substitute.For <IMessageMonitor>();
var messageProcessingStrategy = new Throttled(ConcurrencyLevel, fakeMonitor);
var counter = new ThreadSafeCounter();
var watch = new Stopwatch();
watch.Start();
var actions = BuildFakeIncomingMessages(numberOfMessagesToProcess, counter);
await ListenLoopExecuted(actions, messageProcessingStrategy);
watch.Stop();
await Task.Yield();
await Task.Delay(2000);
await Task.Yield();
Assert.That(counter.Count, Is.EqualTo(numberOfMessagesToProcess));
}
private Queue <Func <Task> > BuildFakeIncomingMessages(int numberOfMessagesToCreate, ThreadSafeCounter counter)
{
var random = new Random();
var actions = new Queue <Func <Task> >();
for (var i = 0; i != numberOfMessagesToCreate; i++)
{
var duration = MinTaskDuration + random.Next(TaskDurationVariance);
var action = new Func <Task>(async() =>
{
await Task.Delay(duration);
counter.Increment();
});
actions.Enqueue(action);
}
return(actions);
}
public async Task SimulatedListenLoop_WhenThrottlingDoesNotOccur_DoNotCallMessageMonitor(int messageCount, int capacity)
{
Assert.That(messageCount, Is.LessThanOrEqualTo(capacity), "To avoid throttling, message count must be not be over capacity");
var fakeMonitor = Substitute.For<IMessageMonitor>();
var messageProcessingStrategy = new Throttled(capacity, fakeMonitor);
var counter = new ThreadSafeCounter();
var actions = BuildFakeIncomingMessages(messageCount, counter);
await ListenLoopExecuted(actions, messageProcessingStrategy);
fakeMonitor.DidNotReceive().IncrementThrottlingStatistic();
}
private Queue<Func<Task>> BuildFakeIncomingMessages(int numberOfMessagesToCreate, ThreadSafeCounter counter)
{
var random = new Random();
var actions = new Queue<Func<Task>>();
for (var i = 0; i != numberOfMessagesToCreate; i++)
{
var duration = MinTaskDuration + random.Next(TaskDurationVariance);
var action = new Func<Task>(async () =>
{
await Task.Delay(duration);
counter.Increment();
});
actions.Enqueue(action);
}
return actions;
}