IObservable <BitmapSource> ResolveImage(SuggestionItem uri)
{
if (uri.ImageUrl != null)
{
return(avatarProvider.GetAvatar(uri.ImageUrl));
}
return(Observable.Return(AvatarProvider.CreateBitmapImage(DefaultAvatar)));
}
public async Task GetsAvatarFromCache()
{
var expectedImage = AvatarProvider.CreateBitmapImage("pack://*****:*****@test.com&s=140");
var blobCache = new InMemoryBlobCache();
var sharedCache = Substitute.For<ISharedCache>();
sharedCache.LocalMachine.Returns(blobCache);
var imageCache = new TestImageCache();
await imageCache.SeedImage(avatarUrl, expectedImage, DateTimeOffset.MaxValue);
var avatarProvider = new AvatarProvider(sharedCache, imageCache);
var avatarContainer = Substitute.For<IAvatarContainer>();
avatarContainer.AvatarUrl.Returns("https://avatars.githubusercontent.com/u/[email protected]&s=140");
var retrieved = await avatarProvider.GetAvatar(avatarContainer);
AssertSameImage(expectedImage, retrieved);
}
public async Task CanBeAccessedFromMultipleThreads()
{
var blobCache = new InMemoryBlobCache();
var sharedCache = Substitute.For<ISharedCache>();
sharedCache.LocalMachine.Returns(blobCache);
var imageCache = new TestImageCache();
var avatarProvider = new AvatarProvider(sharedCache, imageCache);
var expected = avatarProvider.DefaultUserBitmapImage.ToString();
int mainThreadId = Thread.CurrentThread.ManagedThreadId;
int otherThreadId = mainThreadId;
var actual = await Task.Run(() =>
{
otherThreadId = Thread.CurrentThread.ManagedThreadId;
return avatarProvider.DefaultUserBitmapImage.ToString();
});
Assert.Equal(expected, actual);
Assert.NotEqual(mainThreadId, otherThreadId);
}
public void DoesNotThrowOnNullUserOrAvatarUrl()
{
var blobStore = Substitute.For<IBlobCache>();
blobStore.Invalidate(null).Returns(_ => { throw new ArgumentNullException(); });
var sharedCache = Substitute.For<ISharedCache>();
sharedCache.LocalMachine.Returns(blobStore);
var avatarProvider = new AvatarProvider(sharedCache, new TestImageCache());
avatarProvider.InvalidateAvatar(null);
avatarProvider.InvalidateAvatar(Substitute.For<IAvatarContainer>());
}