public async Task TestAB()
{
//create sequencer
ISequencerUC sequencer = SequencerUC.Construct();
//create production code
ProductionCode worker = new ProductionCode(sequencer);
//register production code sequencer event spots
//strategy, one production code event is translated to one unit test code event
sequencer
.Register(ProductionCode.SequencingEnumTest.SpotBegin, new StrategyOneOnOneUC())
.Register(ProductionCode.SequencingEnumTest.SpotEnd, new StrategyOneOnOneUC())
;
//start concurrent tasks
Task.Run(() => { worker.Worker("A"); });
Task.Run(() => { worker.Worker("B"); });
//await two production code events
IProductionPointUC taskWorkerBegin1 = await worker.Sequencer.TestPointAsync(ProductionCode.SequencingEnumTest.SpotBegin);
IProductionPointUC taskWorkerBegin2 = await worker.Sequencer.TestPointAsync(ProductionCode.SequencingEnumTest.SpotBegin);
IProductionPointUC taskWorkerBeginA;
IProductionPointUC taskWorkerBeginB;
//detect which event is which
taskWorkerBeginA = (string)taskWorkerBegin1.ProductionArg == "A" ? taskWorkerBegin1 : null;
taskWorkerBeginA = (string)taskWorkerBegin2.ProductionArg == "A" ? taskWorkerBegin2 : taskWorkerBeginA;
//detect which event is which
taskWorkerBeginB = (string)taskWorkerBegin1.ProductionArg == "B" ? taskWorkerBegin1 : null;
taskWorkerBeginB = (string)taskWorkerBegin2.ProductionArg == "B" ? taskWorkerBegin2 : taskWorkerBeginB;
//decide about the order of execution
taskWorkerBeginA.Complete("A runs first");
//await A to run to SpotB
IProductionPointUC taskWorkerEndA = await worker.Sequencer.TestPointAsync(ProductionCode.SequencingEnumTest.SpotEnd);
//decide about the order of execution
taskWorkerBeginB.Complete("B runs second");
IProductionPointUC taskWorkerEndB = await worker.Sequencer.TestPointAsync(ProductionCode.SequencingEnumTest.SpotEnd);
taskWorkerEndA.Complete("A continue");
taskWorkerEndB.Complete("B continue");
}