public void PostActsAsProxy()
{
int receivedValue = 0;
var ts = new TaskSchedulerSingleThreaded();
var ab = new ActionBlock <int>(i => receivedValue = i, new ExecutionDataflowBlockOptions {
TaskScheduler = ts
});
new TargetBlockWrapper <int>(ab).Post(42);
ts.ExecuteAllTasksInActualThread();
Assert.That(receivedValue, Is.EqualTo(42));
}
public void CheckIfTplDataflowBlocksRunIASingleThread()
{
// Arrange
// We inject the scheduler to the action blocks. Each block inserts the calling thread id to a dictionary.
ConcurrentDictionary <int, int> threadIdCounts = new ConcurrentDictionary <int, int>();
TaskSchedulerSingleThreaded ts = new TaskSchedulerSingleThreaded();
var abList = new List <ActionBlock <string> >
{
new ActionBlock <string>(s => IncreaseThreadIdCount(), new ExecutionDataflowBlockOptions {
TaskScheduler = ts
}),
new ActionBlock <string>(s => IncreaseThreadIdCount(), new ExecutionDataflowBlockOptions {
TaskScheduler = ts
}),
new ActionBlock <string>(s => IncreaseThreadIdCount(), new ExecutionDataflowBlockOptions {
TaskScheduler = ts
}),
new ActionBlock <string>(s => IncreaseThreadIdCount(), new ExecutionDataflowBlockOptions {
TaskScheduler = ts
}),
};
abList.ForEach(b => b.Post("test"));
// Act -> call queued action block calls via a single thread
ts.ExecuteAllTasksInActualThread();
// Assert -> threadIdCounts should only contain one entry with the actual thread id.
Assert.Multiple(() =>
{
var currentThreadId = Thread.CurrentThread.ManagedThreadId;
Assert.That(threadIdCounts.ContainsKey(currentThreadId),
Is.True,
$"Current thread id {currentThreadId} is not included in {nameof(threadIdCounts)}");
Assert.That(threadIdCounts.Count,
Is.EqualTo(1),
$"{nameof(threadIdCounts)} doesnt' contain 1 element");
Assert.That(threadIdCounts[currentThreadId], Is.EqualTo(abList.Count));
});
// Locals
void IncreaseThreadIdCount()
{
var tId = Thread.CurrentThread.ManagedThreadId;
threadIdCounts[tId] = threadIdCounts.ContainsKey(tId) ? ++threadIdCounts[tId] : 1;
}
}
public void ReceiveActsAsProxy()
{
var ts = new TaskSchedulerSingleThreaded();
var sourceBlock = new BufferBlock <int>(new DataflowBlockOptions {
TaskScheduler = ts
});
var targetBlock = new BufferBlock <int>(new DataflowBlockOptions {
TaskScheduler = ts
});
targetBlock.LinkTo(sourceBlock, new DataflowLinkOptions {
PropagateCompletion = true
});
targetBlock.Post(42);
ts.ExecuteAllTasksInActualThread();
var v = new SourceBlockWrapper <int>(sourceBlock).Receive();
Assert.That(v, Is.EqualTo(42));
}