public void AddPartToDeliveryPointShouldAddPartToDeliveryPoint() { StoragePoint receivedDeliveryPoint = null; Part receivedPart = null; var expected = new Part(); var storagePoint = new StoragePoint(); _storageSystem.DeliveryPoints.Add(storagePoint); var insertPartEvent = _eventAggregator.GetEvent <PubSubEvent <InsertPartToDeliveryEvent> >(); insertPartEvent.Subscribe(e => { receivedPart = e.Part; receivedDeliveryPoint = e.DeliveryPoint; }); _storageSystem.AddPartToDeliveryPoint(storagePoint, expected); storagePoint.Parts.Count.Should().Be(1); storagePoint.Parts.First().Should().Be(expected); receivedPart.Should().Be(expected); receivedDeliveryPoint.Should().Be(storagePoint); }