public void When_retry_limits_force_a_message_onto_the_dlq()
{
//NOTE: This test is **slow** because it needs to ensure infrastructure and then wait whilst we requeue a message a number of times,
//then propagate to the DLQ
//start a message pump, let it create infrastructure
var task = Task.Factory.StartNew(() => _messagePump.Run(), TaskCreationOptions.LongRunning);
Task.Delay(20000).Wait();
//put something on an SNS topic, which will be delivered to our SQS queue
_sender.Send(_message);
//Let the message be handled and deferred until it reaches the DLQ
Task.Delay(20000).Wait();
//send a quit message to the pump to terminate it
var quitMessage = new Message(new MessageHeader(Guid.Empty, "", MessageType.MT_QUIT), new MessageBody(""));
_channel.Enqueue(quitMessage);
//wait for the pump to stop once it gets a quit message
Task.WaitAll(new[] { task });
Task.Delay(5000).Wait();
//inspect the dlq
var dlqMessage = _deadLetterConsumer.Receive(10000).First();
//assert this is our message
dlqMessage.Body.Value.Should().Be(_message.Body.Value);
_deadLetterConsumer.Acknowledge(dlqMessage);
}