public async Task<Series> RetrieveFeed(string feedAddr)
{
string content = string.Empty;
using (HttpClient client = new HttpClient())
content = await client.GetStringAsync(feedAddr);
var feed = XElement.Parse(content);
var id = feed.Element(ChannelElementName).Element(LinkElementName).Value;
var title = feed.Element(ChannelElementName).Element(TitleElementName).Value;
var imagePath = feed.Element(ChannelElementName).Element(ImageXName).Attribute(HrefElementName).Value;
var imageElement = feed.Element(ChannelElementName).Element(ImageElementName);
if (imageElement != null)
imagePath = imageElement.Element(UrlElementName).Value;
var description = feed.Element(ChannelElementName).Element(DescriptionElementName).Value;
var rVal = new Series
{
Id = id,
Title = title,
ImagePath = imagePath,
Description = description
};
var items = feed.Element(ChannelElementName).Elements(ItemElementName);
await rVal.SetEpisodes(Task.Run(() => ParseEpisodes(items)));
return rVal;
}
public async Task FastDownloadWorks()
{
var downloader = new FeedDownloaderStub();
var series = new Series();
await series.SetEpisodes(Task.FromResult(new List<Episode>().AsEnumerable()));
downloader.SetResult(Task.FromResult(series));
var underTest = new PodcastCollection(downloader);
Assert.AreEqual(7, underTest.AllGroups.Count);
}
public async Task ExcpetionsCreateEmptySeries()
{
var downloader = new FeedDownloaderStub();
var series = new Series();
var episodeTCS = new TaskCompletionSource<IEnumerable<Episode>>();
var downloadTCS = new TaskCompletionSource<Series>();
var parseTask = series.SetEpisodes(episodeTCS.Task);
downloader.SetResult(downloadTCS.Task);
var underTest = new PodcastCollection(downloader);
episodeTCS.TrySetResult(new List<Episode>().AsEnumerable());
downloadTCS.TrySetException(new NullReferenceException());
await parseTask;
Assert.AreEqual(0, underTest.AllGroups.Count);
}
public async Task SlowDownloadWorks()
{
var downloader = new FeedDownloaderStub();
var series = new Series();
var episodeTCS = new TaskCompletionSource<IEnumerable<Episode>>();
var downloadTCS = new TaskCompletionSource<Series>();
var parseTask = series.SetEpisodes(episodeTCS.Task);
downloader.SetResult(downloadTCS.Task);
var underTest = new PodcastCollection(downloader);
episodeTCS.TrySetResult(new List<Episode>().AsEnumerable());
downloadTCS.TrySetResult(series);
await parseTask;
Assert.AreEqual(7, underTest.AllGroups.Count);
}