public void CannotWriteAfterCompletion()
{
var sut = new BufferedChannel <int>(2);
sut.TryWriteSafe(1);
sut.Complete();
sut.TryWriteSafe(2).ShouldBe(false);
Should.Throw <OperationCanceledException>(() => sut.WriteAsync(2));
}
public void WritesSynchronouslyWhenBufferHasSpace()
{
var sut = new BufferedChannel <int>(2);
sut.TryWriteSafe(1).ShouldBe(true);
sut.TryWriteSafe(2).ShouldBe(true);
sut.TryWriteSafe(3).ShouldBe(false);
sut.TryReadSafe(out int item).ShouldBe(true);
item.ShouldBe(1);
sut.TryWriteSafe(4).ShouldBe(true);
}
public void FailCompletesChannelEvenIfBufferIsNotEmpty()
{
var sut = new BufferedChannel <int>(2);
sut.TryWriteSafe(1);
sut.TryWriteSafe(2);
sut.Terminate(new InvalidOperationException());
sut.Completion.IsCompleted.ShouldBe(false);
sut.TryReadSafe(out int _).ShouldBe(true);
sut.TryReadSafe(out int _).ShouldBe(true);
var result = Should.CompleteIn(() => sut.TryReadSafeAsync().AsTask(), TimeSpan.FromSeconds(1));
result.HasValue.ShouldBeFalse();
sut.Completion.IsFaulted.ShouldBeTrue();
}
public void CancellationCompletesChannel()
{
var sut = new BufferedChannel <int>(2);
sut.TryWriteSafe(1);
sut.TryWriteSafe(2);
sut.Terminate();
sut.Completion.IsCompleted.ShouldBe(false);
sut.TryReadSafe(out int _).ShouldBe(true);
sut.TryReadSafe(out int _).ShouldBe(true);
var result = sut.TryReadSafeAsync().ShouldCompleteIn(Timeout1Sec);
result.HasValue.ShouldBeFalse();
sut.Completion.IsCanceled.ShouldBeTrue();
}
public void CanReadAfterCompletionUntilBufferIsEmpty()
{
var sut = new BufferedChannel <int>(2);
sut.TryWriteSafe(1);
sut.TryWriteSafe(2);
sut.TryComplete();
sut.Completion.IsCompleted.ShouldBe(false);
sut.TryReadSafe(out int _).ShouldBe(true);
sut.Completion.IsCompleted.ShouldBe(false);
sut.TryReadSafe(out int _).ShouldBe(true);
sut.Completion.IsCompleted.ShouldBe(true);
sut.TryReadSafe(out int _).ShouldBe(false);
Should.Throw <TaskCanceledException>(() => sut.ReadAsync().AsTask());
}
public void TryReadReturnsTrueWhenBufferIsNotEmpty()
{
var sut = new BufferedChannel <int>(1);
sut.TryWriteSafe(1).ShouldBe(true);
sut.TryReadSafe(out int _).ShouldBe(true);
}
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 TryWriteReturnsTrueWhenBufferIsNotFull()
{
var sut = new BufferedChannel <int>(1);
sut.TryWriteSafe(1).ShouldBe(true);
}
public void TryWriteReturnsFalseWhenBufferIsFull()
{
var sut = new BufferedChannel <int>(0);
sut.TryWriteSafe(1).ShouldBe(false);
}