static string GetMessagesAsText(ConcurrentList <Tuple <DateTime, DateTime, int> > receivedMessages, ConcurrentList <MessageWithExpectedReturnTime> sentMessages)
{
var receivedMessagesAsText =
string.Join(Environment.NewLine,
receivedMessages
.Select(m => string.Join(";",
new[]
{
m.Item3.ToString(),
m.Item1.ToString(),
m.Item2.ToString(),
})));
var receivedMessageIds = receivedMessages
.Select(m => m.Item3)
.ToList();
var sentButNotReceivedMessages = sentMessages
.Where(m => !receivedMessageIds.Contains(m.MessageId))
.ToList();
return(string.Format(@"Received messages:
{0}
Sent, but not received messages:
{1}", receivedMessagesAsText,
string.Join(Environment.NewLine, sentButNotReceivedMessages.Select(m => m.MessageId))));
}
public void WorksReliablyWithManyTimeouts(int messageCount, int acceptedToleranceSec)
{
// arrange
var receivedMessages = new ConcurrentList <Tuple <DateTime, DateTime, int> >();
var sentMessages = new ConcurrentList <MessageWithExpectedReturnTime>();
var resetEvent = new ManualResetEvent(false);
handlerActivator
.Handle <MessageWithExpectedReturnTime>(
m =>
{
receivedMessages.Add(Tuple.Create(m.ExpectedReturnTime, DateTime.UtcNow, m.MessageId));
var currentCount = receivedMessages.Count;
if (currentCount >= messageCount)
{
Console.WriteLine("Got {0} messages, setting reset event", currentCount);
resetEvent.Set();
}
});
var acceptedTolerance = acceptedToleranceSec.Seconds();
var random = new Random();
var number = 0;
// act
messageCount.Times(() =>
{
var delay = (random.Next(20) + 10).Seconds();
var message = new MessageWithExpectedReturnTime
{
ExpectedReturnTime = DateTime.UtcNow + delay,
MessageId = number++
};
bus.Defer(delay, message);
sentMessages.Add(message);
});
using (var timer = new Timer())
{
timer.Elapsed += (o, ea) => Console.WriteLine("{0}: got {1} messages", DateTime.UtcNow, receivedMessages.Count);
timer.Interval = 3000;
timer.Start();
if (!resetEvent.WaitOne(150.Seconds()))
{
Assert.Fail(@"Only {0} messages were received within the 45 s timeout!!
Here they are:
{1}",
receivedMessages.Count, GetMessagesAsText(receivedMessages, sentMessages));
}
// just wait a while, to be sure that more messages are not arriving
Thread.Sleep(1000);
}
// assert
if (receivedMessages.Count != sentMessages.Count)
{
Assert.Fail(@"Expected {0} messages to have been received, but we got {1}!!
Here they are:
{1}", sentMessages.Count, receivedMessages.Count, GetMessagesAsText(receivedMessages, sentMessages));
}
foreach (var messageTimes in receivedMessages)
{
var lowerBound = messageTimes.Item1 - acceptedTolerance;
var upperBound = messageTimes.Item1 + acceptedTolerance;
if (messageTimes.Item2 <= lowerBound || messageTimes.Item2 >= upperBound)
{
Assert.Fail("Something is wrong with message # {0} - the time of receiving it ({1}) was outside accepted bounds {2} - {3} - the timeout was set to {4}",
messageTimes.Item3, messageTimes.Item2, lowerBound, upperBound, messageTimes.Item1);
}
}
}