Akka.Streams.Tests.Dsl.FlowExpandSpec.Expand_musst_pass_through_elements_unchanged_when_there_is_no_rate_differenc C# (CSharp) Method

        public void Expand_musst_pass_through_elements_unchanged_when_there_is_no_rate_differenc()
        {
            // Shadow the fuzzed materializer (see the ordering guarantee needed by the for loop below).
            var materializer = ActorMaterializer.Create(Sys, Settings.WithFuzzingMode(false));

            var publisher = TestPublisher.CreateProbe<int>(this);
            var subscriber = TestSubscriber.CreateProbe<int>(this);

            // Simply repeat the last element as an extrapolation step
            Source.FromPublisher(publisher)
                .Expand(i => Enumerable.Repeat(i, 200).GetEnumerator())
                .To(Sink.FromSubscriber(subscriber))
                .Run(materializer);

            for (var i = 1; i <= 100; i++)
            {
                // Order is important here: If the request comes first it will be extrapolated!
                publisher.SendNext(i);
                subscriber.RequestNext(i);
            }

            subscriber.Cancel();
        }