public void TestImageSourceToNullCancelsLoading()
{
var image = new ImageButton();
var mockImageRenderer = new MockImageRenderer(image);
var loader = new UriImageSource {
Uri = new Uri("http://www.public-domain-image.com/free-images/miscellaneous/big-high-border-fence.jpg")
};
image.Source = loader;
Assert.IsTrue(image.IsLoading);
image.Source = null;
Assert.IsFalse(image.IsLoading);
Assert.IsTrue(cancelled);
}
public void TestImageSourceToNullCancelsLoading()
{
var cancelled = false;
var image = new ImageButton();
var mockImageRenderer = new MockImageRenderer(image);
var loader = new StreamImageSource {
Stream = GetStreamAsync
};
image.Source = loader;
Assert.IsTrue(image.IsLoading);
image.Source = null;
mockImageRenderer.CompletionSource.Task.Wait();
Assert.IsFalse(image.IsLoading);
Assert.IsTrue(cancelled);
async Task <Stream> GetStreamAsync(CancellationToken cancellationToken)
{
try
{
await Task.Delay(5000, cancellationToken);
}
catch (TaskCanceledException ex)
{
cancelled = true;
throw ex;
}
if (cancellationToken.IsCancellationRequested)
{
cancelled = true;
throw new TaskCanceledException();
}
var stream = typeof(ImageTests).Assembly.GetManifestResourceStream("dummy");
return(stream);
}
}
public void TestImageSourceToNullCancelsLoading ()
{
var image = new Image ();
var mockImageRenderer = new MockImageRenderer (image);
var loader = new UriImageSource { Uri = new Uri ("http://www.public-domain-image.com/free-images/miscellaneous/big-high-border-fence.jpg") };
image.Source = loader;
Assert.IsTrue (image.IsLoading);
image.Source = null;
Assert.IsFalse (image.IsLoading);
Assert.IsTrue (cancelled);
}