public void PhotosGetContactsPhotosAsyncTest() { var w = new AsyncSubject <FlickrResult <PhotoCollection> >(); AuthInstance.PhotosGetContactsPhotosAsync(50, true, true, true, PhotoSearchExtras.All, r => { w.OnNext(r); w.OnCompleted(); }); var result = w.Next().First(); Assert.IsFalse(result.HasError); Assert.IsNotNull(result.Result); Assert.IsTrue(result.Result.Count > 0, "Should return some photos."); }