public async Task ReadCanBeCanceledViaCancelPendingReadWhenReadIsAsync()
{
var pipeReader = new StreamPipeReader(new HangingStream());
var result = new ReadResult();
var tcs = new TaskCompletionSource <int>(TaskCreationOptions.RunContinuationsAsynchronously);
var task = Task.Run(async() =>
{
var readingTask = pipeReader.ReadAsync();
tcs.SetResult(0);
result = await readingTask;
});
await tcs.Task;
pipeReader.CancelPendingRead();
await task;
Assert.True(result.IsCanceled);
}