public void DoStuff()
{
var c = new ThirdPartyYoutube();
c.GetVideoInfo(100);
c.GetVideoInfo(100);
c.DownloadVideo(100);
c.DownloadVideo(100);
c.ListVideos();
CollectionAssert.AreEqual(new[] {
"Get video 100",
"Get video 100", // nackdel: inget cache'as
"Download video 100",
"Download video 100", // nackdel: inget cache'as
"List all videos"
}, c.Events.ToArray());
// Fördel: ingen extra kod
}
public DownloadedVideo DownloadVideo(int id)
{
if (_cached.ContainsKey(id) && _cached[id] is DownloadedVideo)
{
_events.Enqueue($"Download video {id} from cache");
return((DownloadedVideo)_cached[id]);
}
var downloaded = _thirdPartyYoutube.DownloadVideo(id);
if (_cached.ContainsKey(id))
{
_cached.Remove(id);
}
_cached.Add(id, downloaded);
_events.Enqueue($"Download video {id}");
return(downloaded);
}