public async Task <IEnumerable <INews> > GetNewsAsync()
{
try
{
IEnumerable <INewsProvider> newsProviders = await _dataProviderFactory.BuildNewsProvidersAsync();
if (newsProviders == null || newsProviders.Any() == false)
{
return(new List <INews>(0));
}
Task <IEnumerable <INews> >[] getNewsFromNewsProviderTasks = newsProviders.Select(GetNewsFromNewsProviderAsync).ToArray();
await Task.WhenAll(getNewsFromNewsProviderTasks);
return(getNewsFromNewsProviderTasks
.Where(task => task.IsFaulted == false)
.SelectMany(task => task.Result)
.OrderByDescending(news => news.Timestamp)
.ToList());
}
catch (AggregateException ex)
{
await _exceptionHandler.HandleAsync(ex);
}
catch (Exception ex)
{
await _exceptionHandler.HandleAsync(ex);
}
return(new List <INews>(0));
}
public async Task BuildNewsProvidersAsync_WhenCalled_ReturnsNewsProviders()
{
IDataProviderFactory sut = CreateSut();
IEnumerable <INewsProvider> newsProviders = await sut.BuildNewsProvidersAsync();
Assert.IsNotNull(newsProviders);
Assert.AreEqual(5, newsProviders.Count());
AssertNewsProvider(newsProviders.ElementAt(0), "DR", "https://www.dr.dk/nyheder/service/feeds/allenyheder");
AssertNewsProvider(newsProviders.ElementAt(1), "TV 2 Lorry", "https://www.tv2lorry.dk/rss");
AssertNewsProvider(newsProviders.ElementAt(2), "Børsen", "https://borsen.dk/rss");
AssertNewsProvider(newsProviders.ElementAt(3), "Computerworld", "https://www.computerworld.dk/rss/all");
AssertNewsProvider(newsProviders.ElementAt(4), "Version2", "https://www.version2.dk/it-nyheder/rss");
}