public async Task ShouldPublishWithUsing() { // arrange string topic = Guid.NewGuid().ToString(); List <Message> messages = new List <Message>(); var processor = new TestMessageProcessor(50, messages); host.RegisterMessageProcessor(topic + "TestEvent", processor); var settings = publisterSettings.Copy(); settings.Topic = topic; var count = 10; // act using (var publisher = new DomainEventPublisher(settings, new NullLogger <DomainEventPublisher>())) { publisher.Connect(); for (int i = 0; i < count; i++) { var @event = new TestEvent() { IntValue = random.Next(), StringValue = Guid.NewGuid().ToString() }; await publisher.PublishAsync(@event).ConfigureAwait(false); } } // assert Assert.Equal(count, processor.Messages.Count); }