public async Task InvokeAsync_NonSpecialExceptionIsThrown_OriginalMessageShouldBeSentToTheDeadLetterQueue()
{
//prepare
var originalSubscriptionMock = new Mock <ISubscription>();
var publisherMock = new Mock <IPublisher>();
string subscriberDeadLetterQueueName = "deadletter.subscriber";
var argumentException = new ArgumentException();
originalSubscriptionMock.Setup(x => x.InvokeAsync(_serializedMessage)).Returns <string>(
(msg) =>
{
return(Task.FromException(argumentException));
});
//act
DeadLetterSubscriptionWrapper actor = new DeadLetterSubscriptionWrapper(originalSubscriptionMock.Object,
publisherMock.Object, subscriberDeadLetterQueueName);
await actor.InvokeAsync(_serializedMessage);
//check
originalSubscriptionMock.Verify(x => x.NotifyAboutDeadLetterAsync(It.IsAny <string>(), It.IsAny <Exception>()), Times.Never);
IntegrationEvent <DeadLetterEventDescriptor <JObject> > integrationEvent =
JsonConvert.DeserializeObject <IntegrationEvent <DeadLetterEventDescriptor <JObject> > >(_serializedMessage);
publisherMock.Verify(x => x.PublishDirectEventAsync(It.Is <IntegrationEvent <DeadLetterEventDescriptor <JObject> > >(actualevent => actualevent.CorrelationId == integrationEvent.CorrelationId),
subscriberDeadLetterQueueName, true), Times.Once);
}
public void InvokeAsync_SpecialExceptionIsThrown_ExceptionShouldBePropogated(Type exceptionType)
{
//prepare
var originalSubscriptionMock = new Mock <ISubscription>();
var publisherMock = new Mock <IPublisher>();
string message = "justMessage";
originalSubscriptionMock.Setup(x => x.InvokeAsync(message)).Returns <string>(
(msg) =>
{
return(Task.FromException((Exception)Activator.CreateInstance(exceptionType)));
});
//act
DeadLetterSubscriptionWrapper actor = new DeadLetterSubscriptionWrapper(originalSubscriptionMock.Object, publisherMock.Object, null);
Func <Task> f = async() =>
{
await actor.InvokeAsync(message);
};
//check
f.ShouldThrow <Exception>();
originalSubscriptionMock.Verify(x => x.NotifyAboutDeadLetterAsync(It.IsAny <string>(), It.IsAny <Exception>()), Times.Never);
publisherMock.Verify(x => x.PublishDirectEventAsync(It.IsAny <IntegrationEvent <DeadLetterEventDescriptor <JObject> > >(),
It.IsAny <string>(), It.IsAny <bool>()), Times.Never);
}
