AsyncMrFlakey (nuget): Mr Flakey provides easy way to do ad-hoc testing of network failure of your async calls.        (1) Add the NuGet package  (2) On any async network call that might fail and you want to test, stick a call to the Flakey extension method. For instance "Await DownloadAsync().Flakey()"  (3) For ad-hoc testing, put a call to MrFlakey.Start() somewhere e.g. in MainPage.xaml construction. To stop using Mr Flakey, remove this call.  This way, every .Flakey() thing you await will give the tester the chance - within the app's UI - to simulate failure of the async operation.
Keywords: async|testing|network