public async Task ShouldSendOrderedNotificationsForArticlesWithGreaterDate() { IEnumerable <Article> received = null; _notificationService .When(x => x.SendNotifications(Arg.Any <IEnumerable <Article> >())) .Do(callback => received = callback.Arg <IEnumerable <Article> >()); _settingManager.Read().Returns(new Settings { Fetched = DateTime.MinValue }); _feedStoreService.Load(Arg.Any <IEnumerable <Channel> >()).Returns(new List <Article> { new Article { Title = "Foo", PublishedDate = DateTime.Now }, new Article { Title = "Bar", PublishedDate = DateTime.MaxValue } }); await _backgroundService.CheckForUpdates(DateTime.Now); var response = new List <Article>(received); response.First().Title.Should().Be("Foo"); response.Last().Title.Should().Be("Bar"); response.Count.Should().Be(2); }