Akka.Streams.Tests.Dsl.QueueSourceSpec.QueueSource_should_remember_pull_from_downstream_to_send_offered_element_immediately C# (CSharp) Метод

        public void QueueSource_should_remember_pull_from_downstream_to_send_offered_element_immediately()
        {
            this.AssertAllStagesStopped(() =>
            {
                var s = this.CreateManualProbe<int>();
                var probe = CreateTestProbe();
                var queue = TestSourceStage<int, ISourceQueue<int>>.Create(
                    new QueueSource<int>(1, OverflowStrategy.DropHead), probe)
                    .To(Sink.FromSubscriber(s))
                    .Run(_materializer);
                var sub = s.ExpectSubscription();

                sub.Request(1);
                probe.ExpectMsg<GraphStageMessages.Pull>();
                AssertSuccess(queue.OfferAsync(1));
                s.ExpectNext(1);
                sub.Cancel();
            }, _materializer);
        }