public MainWindowViewModel(DataRepository repo)
{
this.repo = repo.ThrowIfNull();
feeds = new ObservableCollection<FeedViewModel>(
repo.AllFeeds().Select(feed => new FeedViewModel(repo, feed)));
feedItems = new ObservableCollection<FeedItemViewModel>(
repo.AllFeedItems().Select(feedItem => new FeedItemViewModel(feedItem)));
FeedsView = CollectionViewSource.GetDefaultView(feeds);
FeedsView.CurrentChanged += HandleFeedsViewCurrentChanged;
FeedItemsView = CollectionViewSource.GetDefaultView(feedItems);
FeedItemsView.Filter = FeedItemsViewFilter;
FeedItemsView.SortDescriptions.Add(new SortDescription("PublishDate",
ListSortDirection.Descending));
NewFeedCommand = new RelayCommand(param => NewFeed());
ModifyFeedCommand = new RelayCommand(param => ModifyFeed());
ClearFeedItemsFilterCommand = new RelayCommand(param => ClearFeedItemsFilter());
repo.FeedAdded += HandleFeedAdded;
repo.FeedModified += HandleFeedModified;
repo.FeedDeleted += HandleFeedDeleted;
repo.FeedItemsAdded += HandleFeedItemsAdded;
FeedsView.MoveCurrentTo(null);
}
public void AllFeedItems_ReturnsAllFeedItems()
{
Feed feed = new Feed { Title = "test feed", Url = "url" };
context.Feeds.Add(feed);
context.FeedItems.Add(new FeedItem { Feed = feed, Title = "feed item 1" });
context.FeedItems.Add(new FeedItem { Feed = feed, Title = "feed item 2" });
context.FeedItems.Add(new FeedItem { Feed = feed, Title = "feed item 3" });
context.SaveChanges();
DataRepository underTest = new DataRepository(context);
List<FeedItem> returnedFeedItems = new List<FeedItem>(underTest.AllFeedItems());
Assert.AreEqual(context.FeedItems.Count(), returnedFeedItems.Count(),
"Returned AllFeedItems collection is the wrong length.");
Assert.Contains(context.FeedItems.Single(fi => fi.Title == "feed item 1"), returnedFeedItems);
Assert.Contains(context.FeedItems.Single(fi => fi.Title == "feed item 2"), returnedFeedItems);
Assert.Contains(context.FeedItems.Single(fi => fi.Title == "feed item 3"), returnedFeedItems);
}