Akka.Streams.Tests.Dsl.FlowSplitWhenSpec.SplitWhen_must_support_cancelling_substreams C# (CSharp) Method

        public void SplitWhen_must_support_cancelling_substreams()
        {
            this.AssertAllStagesStopped(() =>
            {
                WithSubstreamsSupport(5, 8, run: (masterSubscriber, masterSubscription, getSubFlow) =>
                {
                    var s1 = new StreamPuppet(getSubFlow().RunWith(Sink.AsPublisher<int>(false), Materializer), this);
                    s1.Cancel();
                    var s2 = new StreamPuppet(getSubFlow().RunWith(Sink.AsPublisher<int>(false), Materializer), this);

                    s2.Request(4);
                    s2.ExpectNext(5);
                    s2.ExpectNext(6);
                    s2.ExpectNext(7);
                    s2.ExpectNext(8);
                    s2.Request(1);
                    s2.ExpectComplete();

                    masterSubscription.Request(1);
                    masterSubscriber.ExpectComplete();
                });
            }, Materializer);
        }