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 WritesSynchronouslyWhenBufferHasSpace()
{
var sut = new BufferedChannel <int>(2);
sut.TryWrite(1).ShouldBe(true);
sut.TryWrite(2).ShouldBe(true);
sut.TryWrite(3).ShouldBe(false);
sut.TryRead(out int item).ShouldBe(true);
item.ShouldBe(1);
sut.TryWrite(4).ShouldBe(true);
}
public void TerminationCompletesChannelWithException()
{
var sut = new BufferedChannel <int>(2);
sut.TryWrite(1);
sut.TryWrite(2);
sut.Terminate(new InvalidOperationException());
sut.Completion.IsCompleted.ShouldBe(false);
sut.TryRead(out int _).ShouldBe(true);
sut.TryRead(out int _).ShouldBe(true);
Should.Throw <InvalidOperationException>(() => sut.TryReadAsync().AsTask(), Timeout1Sec);
sut.Completion.IsFaulted.ShouldBeTrue();
}
public void CancellationCompletesChannel()
{
var sut = new BufferedChannel <int>(2);
sut.TryWrite(1);
sut.TryWrite(2);
sut.Terminate();
sut.Completion.IsCompleted.ShouldBe(false);
sut.TryRead(out int _).ShouldBe(true);
sut.TryRead(out int _).ShouldBe(true);
Should.Throw <TaskCanceledException>(sut.TryReadAsync().AsTask(), Timeout1Sec);
sut.Completion.IsCanceled.ShouldBeTrue();
}
public void CanReadAfterCompletionUntilBufferIsEmpty()
{
var sut = new BufferedChannel <int>(2);
sut.TryWrite(1);
sut.TryWrite(2);
sut.TryComplete();
sut.Completion.IsCompleted.ShouldBe(false);
sut.TryRead(out int _).ShouldBe(true);
sut.Completion.IsCompleted.ShouldBe(false);
sut.TryRead(out int _).ShouldBe(true);
sut.Completion.IsCompleted.ShouldBe(true);
sut.TryRead(out int _).ShouldBe(false);
Should.Throw <TaskCanceledException>(() => sut.ReadAsync().AsTask());
}
public void TryReadReturnsTrueWhenBufferIsNotEmpty()
{
var sut = new BufferedChannel <int>(1);
sut.TryWrite(1).ShouldBe(true);
sut.TryRead(out int _).ShouldBe(true);
}
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);
}
public void TryWriteReturnsTrueWhenBufferIsNotFull()
{
var sut = new BufferedChannel <int>(1);
sut.TryWrite(1).ShouldBe(true);
}
public void TryWriteReturnsFalseWhenBufferIsFull()
{
var sut = new BufferedChannel <int>(0);
sut.TryWrite(1).ShouldBe(false);
}