public void CompleteAbortsPendingWriteTasks()
{
var sut = new BufferedChannel <int>(0);
var writeTask1 = sut.WriteAsync(1);
var writeTask2 = sut.WriteAsync(2);
sut.Complete();
Should.Throw <TaskCanceledException>(() => writeTask1, Timeout1Sec);
Should.Throw <TaskCanceledException>(() => writeTask2, Timeout1Sec);
}
public void WriteAsyncCompletesWhenThereIsBufferSpaceAvailable()
{
var sut = new BufferedChannel <int>(1);
Should.CompleteIn(sut.WriteAsync(1), Timeout1Sec);
var writeTask = sut.WriteAsync(2);
writeTask.IsCompleted.ShouldBe(false);
sut.TryRead(out var item).ShouldBe(true);
item.ShouldBe(1);
Should.CompleteIn(writeTask, Timeout1Sec);
sut.TryRead(out item).ShouldBe(true);
item.ShouldBe(2);
}
#pragma warning disable xUnit1026 // Theory methods should use all of their parameters
public void CanWriteAndReadFromSeveralThreadsConcurrently(int writeThreads, int readThreads, int bufferSize)
#pragma warning restore xUnit1026 // Theory methods should use all of their parameters
{
var writeCount = readThreads * 100;
var readCount = writeThreads * 100;
var sut = new BufferedChannel <int>(bufferSize);
async Task WriteWorker()
{
for (var i = 0; i < writeCount; i++)
{
await sut.WriteAsync(i).ConfigureAwait(false);
}
}
async Task ReadWorker()
{
for (var i = 0; i < readCount; i++)
{
await sut.ReadAsync().ConfigureAwait(false);
}
}
var writeTasks = Enumerable.Range(0, writeThreads).Select(_ => Task.Run(WriteWorker));
var readTasks = Enumerable.Range(0, readThreads).Select(_ => Task.Run(ReadWorker));
var allTasks = writeTasks.Concat(readTasks).ToArray();
Task.WhenAll(allTasks).ShouldCompleteIn(Timeout10Sec);
sut.TryRead(out int _).ShouldBe(false);
sut.TryComplete().ShouldBe(true);
}
public void CannotWriteAfterCompletion()
{
var sut = new BufferedChannel <int>(2);
sut.TryWrite(1);
sut.Complete();
sut.TryWrite(2).ShouldBe(false);
Should.Throw <OperationCanceledException>(() => sut.WriteAsync(2));
}
public void ReadsSynchronouslyWhenThereIsPendingWriteTask()
{
var sut = new BufferedChannel <int>(0);
var writeTask = sut.WriteAsync(3);
sut.TryReadSafe(out int item).ShouldBe(true);
item.ShouldBe(3);
Should.CompleteIn(writeTask, TimeSpan.FromSeconds(1));
}
public void WritesSynchronouslyWhenThereIsPendingReadTask()
{
var sut = new BufferedChannel <int>(0);
var readTask = sut.ReadAsync();
sut.TryWriteSafe(1).ShouldBe(false);
sut.WriteAsync(1).ShouldCompleteIn(Timeout1Sec);
Should.CompleteIn(readTask.AsTask(), TimeSpan.FromSeconds(1));
readTask.Result.ShouldBe(1);
}
public void TerminatesOnWriteTimeout()
{
var sut = new BufferedChannel <int>(1, Timeout100Ms);
Should.NotThrow(sut.WriteAsync(1), Timeout1Sec);
sut.TryWrite(1).ShouldBe(false);
Should.Throw <ChannelWriteTimeoutException>(sut.WaitWriteAvailableAsync(), Timeout1Sec);
Should.Throw <ChannelWriteTimeoutException>(sut.Out.Completion, Timeout1Sec);
sut.TryRead(out _).ShouldBe(true);
Should.Throw <Exception>(sut.Completion, Timeout1Sec);
}
public async Task SlidesWriteTimeoutAfterWriteAvailable()
{
var sut = new BufferedChannel <int>(1, Timeout50Ms);
sut.TryWrite(1).ShouldBe(true);
await Task.Delay(Timeout10Ms).ConfigureAwait(false);
sut.TryRead(out _).ShouldBe(true);
await Task.Delay(Timeout100Ms).ConfigureAwait(false);
sut.Out.Completion.IsCompleted.ShouldBeFalse();
Should.NotThrow(() => sut.WriteAsync(1), Timeout1Sec);
await Task.Delay(Timeout10Ms).ConfigureAwait(false);
sut.TryRead(out _).ShouldBe(true);
}