public async Task Encode_IsCancellable(JpegColorType colorType)
{
var cts = new CancellationTokenSource();
using var pausedStream = new PausedStream(new MemoryStream());
pausedStream.OnWaiting(s =>
{
// after some writing
if (s.Position >= 500)
{
cts.Cancel();
pausedStream.Release();
}
else
{
// allows this/next wait to unblock
pausedStream.Next();
}
});
using var image = new Image <Rgba32>(5000, 5000);
await Assert.ThrowsAsync <TaskCanceledException>(async() =>
{
var encoder = new JpegEncoder()
{
ColorType = colorType
};
await image.SaveAsync(pausedStream, encoder, cts.Token);
});
}
public async Task SaveAsync_WithNonSeekableStream_IsCancellable()
{
using var image = new Image <Rgba32>(4000, 4000);
var encoder = new PngEncoder()
{
CompressionLevel = PngCompressionLevel.BestCompression
};
using var stream = new MemoryStream();
var asyncStream = new AsyncStreamWrapper(stream, () => false);
var cts = new CancellationTokenSource();
var pausedStream = new PausedStream(asyncStream);
pausedStream.OnWaiting(s =>
{
cts.Cancel();
pausedStream.Release();
});
await Assert.ThrowsAsync <TaskCanceledException>(async() => await image.SaveAsync(pausedStream, encoder, cts.Token));
}