Akka.Streams.Tests.Dsl.FlowConcatAllSpec.ConcatAll_must_work_together_with_SplitWhen C# (CSharp) Method

        public void ConcatAll_must_work_together_with_SplitWhen()
        {
            var subscriber = TestSubscriber.CreateProbe<int>(this);
            var source = Source.From(Enumerable.Range(1, 10))
                .SplitWhen(x => x%2 == 0)
                .PrefixAndTail(0)
                .Select(x => x.Item2)
                .ConcatSubstream()
                .ConcatMany(x => x);
            ((Source<int, NotUsed>) source).RunWith(Sink.FromSubscriber(subscriber), Materializer);

            for (var i = 1; i <= 10; i++)
                subscriber.RequestNext(i);

            subscriber.Request(1);
            subscriber.ExpectComplete();}