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 FeedViewModel(DataRepository repo, Feed feed) : base(feed)
{
this.repo = repo.ThrowIfNull();
ProcessFeedCommand = new RelayCommand(param => ProcessFeed(), param => true);
SaveFeedCommand = new RelayCommand(param => SaveFeed(), param => true);
DeleteFeedCommand = new RelayCommand(param => DeleteFeed());
}
private void Application_Startup(object sender, StartupEventArgs e)
{
repo = new DataRepository(new DB());
MainWindow mainWindow = new MainWindow();
MainWindow.DataContext = new MainWindowViewModel(repo);
mainWindow.Show();
}
public void AddFeed_WithValidFeed_AddsAndSavesFeed()
{
Feed newFeed = new Feed { Title = "new feed", Url = "url" };
DataRepository underTest = new DataRepository(context);
underTest.AddFeed(newFeed);
Assert.Contains(newFeed, context.Feeds.ToList());
}
public void DeleteFeed_WithValidFeed_DeletesFeed()
{
context.Feeds.Add(new Feed { Title = "test feed 1", Url = "url" });
context.SaveChanges();
DataRepository underTest = new DataRepository(context);
Feed feedToDelete = context.Feeds.First();
underTest.DeleteFeed(feedToDelete);
Assert.IsFalse(context.Feeds.Any(f => f.ID == feedToDelete.ID));
}
public void AllFeeds_ReturnsAllFeeds()
{
context.Feeds.Add(new Feed { Title = "test feed 1", Url = "url" });
context.Feeds.Add(new Feed { Title = "test feed 2", Url = "url" });
context.Feeds.Add(new Feed { Title = "test feed 3", Url = "url" });
context.SaveChanges();
DataRepository underTest = new DataRepository(context);
List<Feed> returnedFeeds = new List<Feed>(underTest.AllFeeds());
Assert.AreEqual(context.Feeds.Count(), returnedFeeds.Count(),
"Returned AllFeeds collection is the wrong length.");
Assert.Contains(context.Feeds.Single(f => f.Title == "test feed 1"), returnedFeeds);
Assert.Contains(context.Feeds.Single(f => f.Title == "test feed 2"), returnedFeeds);
Assert.Contains(context.Feeds.Single(f => f.Title == "test feed 3"), returnedFeeds);
}
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);
}
public void FeedExists_WhenFeedDoesNotExist_ReturnsFalse()
{
DataRepository underTest = new DataRepository(context);
Feed nonExistantFeed = new Feed { Title = "feed", Url = "url" };
Assert.IsFalse(underTest.FeedExists(nonExistantFeed));
}
public void ModifyFeed_WithValidFeed_ModifiesAndSavesChangesToFeed()
{
context.Feeds.Add(new Feed { Title = "test feed 1", Url = "url" });
context.SaveChanges();
DataRepository underTest = new DataRepository(context);
Feed feedToModify = context.Feeds.First();
feedToModify.Title += " MODIFIED";
underTest.ModifyFeed(feedToModify);
var feedTitleProperty = context.Entry(feedToModify).Property(f => f.Title);
Assert.AreEqual(feedTitleProperty.CurrentValue, feedTitleProperty.OriginalValue);
}
public void FeedExists_WhenFeedExists_ReturnsTrue()
{
Feed existingFeed = new Feed { Title = "feed", Url = "url" };
context.Feeds.Add(existingFeed);
context.SaveChanges();
DataRepository underTest = new DataRepository(context);
Assert.IsTrue(underTest.FeedExists(existingFeed));
}
public void SetUp()
{
mockContext = new Mock<IDB>();
mockFeedSet = new Mock<DbSet<Feed>>();
mockFeedItemSet = new Mock<DbSet<FeedItem>>();
mockContext.Setup(m => m.Feeds).Returns(mockFeedSet.Object);
mockContext.Setup(m => m.FeedItems).Returns(mockFeedItemSet.Object);
// Do nothing for call to Include.
mockFeedItemSet.Setup(m => m.Include(It.IsAny<string>())).Returns(mockFeedItemSet.Object);
singleFeed = new Feed { ID = 42, Url = "http://www.something.com", Title = "Something" };
repoUnderTest = new DataRepository(mockContext.Object);
}
