public async Task ReadCanBeCanceledViaCancelPendingReadWhenReadIsAsync()
{
var stream = new CancelledReadsStream();
PipeReader reader = PipeReader.Create(stream);
ValueTask <ReadResult> task = reader.ReadAsync();
reader.CancelPendingRead();
stream.WaitForReadTask.TrySetResult(null);
ReadResult readResult = await task;
Assert.True(readResult.IsCanceled);
reader.Complete();
}
public async Task ReadCanBeCanceledViaCancelPendingReadWhenReadAtLeastAsync(bool useZeroByteReads)
{
var stream = new CancelledReadsStream();
PipeReader reader = PipeReader.Create(stream, new StreamPipeReaderOptions(useZeroByteReads: useZeroByteReads));
ValueTask <ReadResult> task = reader.ReadAtLeastAsync(1);
reader.CancelPendingRead();
stream.WaitForReadTask.TrySetResult(null);
ReadResult readResult = await task;
Assert.True(readResult.IsCanceled);
reader.Complete();
}
public async Task ReadCanBeCancelledViaProvidedCancellationToken()
{
var stream = new CancelledReadsStream();
PipeReader reader = PipeReader.Create(stream);
var cts = new CancellationTokenSource();
ValueTask <ReadResult> task = reader.ReadAsync(cts.Token);
Assert.False(task.IsCompleted);
cts.Cancel();
stream.WaitForReadTask.TrySetResult(null);
await Assert.ThrowsAsync <OperationCanceledException>(async() => await task);
reader.Complete();
}
public async Task CancelingStreamViaCancellationTokenThrows()
{
var pipe = new Pipe();
var stream = new CancelledReadsStream();
var cts = new CancellationTokenSource();
Task task = stream.CopyToAsync(pipe.Writer, cts.Token);
Assert.False(task.IsCompleted);
cts.Cancel();
stream.WaitForReadTask.TrySetResult(null);
await Assert.ThrowsAsync <OperationCanceledException>(() => task);
pipe.Writer.Complete();
pipe.Reader.Complete();
}
