public void CompleteMultipleFrames()
        {
            var pipelineStages = new List <PipelineStage>();

            var soloSystem = new SoloSystem();
            var methodInfo = soloSystem.GetType().GetMethod("Process");

            var systemBindings = new List <ISystemBinding>();

            systemBindings.Add(new SystemBindingWithoutComponents(methodInfo, soloSystem));
            pipelineStages.Add(new PipelineStage(systemBindings));
            pipelineStages.Add(new PipelineStage(systemBindings));

            var pipeline = new ParallelPipeline(pipelineStages);

            pipeline.Run();
            pipeline.Wait();
            Assert.That(pipeline.ActiveThreads, Is.EqualTo(1));

            pipeline.Run();
            pipeline.Wait();
            Assert.That(pipeline.ActiveThreads, Is.EqualTo(1));

            pipeline.Stop();
            Assert.That(pipeline.ActiveThreads, Is.EqualTo(0));
        }