Akka.Streams.Tests.Dsl.FlowDelaySpec.A_Delay_must_emit_early_when_buffer_is_full_and_in_EmitEarly_mode C# (CSharp) Method

        public void A_Delay_must_emit_early_when_buffer_is_full_and_in_EmitEarly_mode()
        {
            this.AssertAllStagesStopped(() =>
            {
                var c = TestSubscriber.CreateManualProbe<int>(this);
                var p = TestPublisher.CreateManualProbe<int>(this);

                Source.FromPublisher(p)
                    .Delay(TimeSpan.FromSeconds(10), DelayOverflowStrategy.EmitEarly)
                    .WithAttributes(Attributes.CreateInputBuffer(16, 16))
                    .To(Sink.FromSubscriber(c))
                    .Run(Materializer);
                var cSub = c.ExpectSubscription();
                var pSub = p.ExpectSubscription();
                cSub.Request(20);

                Enumerable.Range(1, 16).ForEach(i => pSub.SendNext(i));
                c.ExpectNoMsg(TimeSpan.FromMilliseconds(300));
                pSub.SendNext(17);
                c.ExpectNext(1, TimeSpan.FromMilliseconds(100));
                // fail will terminate despite of non empty internal buffer
                pSub.SendError(new SystemException());
            }, Materializer);
        }
    }