public void CatalogAdd_ShouldFireEvents() { var catalog = new TypeCatalog(typeof(SampleCatalogExport)); var aggCat = new AggregateCatalog(); var container = ContainerFactory.Create(aggCat); var eventListener = new ExportProviderListener(container, container); eventListener.VerifyCatalogAdd(() => aggCat.Catalogs.Add(catalog), typeof(SampleCatalogExport)); }