Akka.Streams.Tests.Dsl.FlowPrefixAndTailSpec.PrefixAndTail_must_work_on_empty_input C# (CSharp) Method

        public void PrefixAndTail_must_work_on_empty_input()
        {
            this.AssertAllStagesStopped(() =>
            {
                var futureSink = NewHeadSink;
                var fut = Source.Empty<int>().PrefixAndTail(10).RunWith(futureSink, Materializer);
                fut.Wait(TimeSpan.FromSeconds(3)).Should().BeTrue();
                var tailFlow = fut.Result.Item2;
                var tailSubscriber = TestSubscriber.CreateManualProbe<int>(this);
                tailFlow.To(Sink.FromSubscriber(tailSubscriber)).Run(Materializer);
                tailSubscriber.ExpectSubscriptionAndComplete();
            }, Materializer);
        }