Akka.Streams.Tests.Dsl.QueueSinkSpec.QueueSink_should_fail_pull_future_when_stream_is_completed C# (CSharp) Method

        public void QueueSink_should_fail_pull_future_when_stream_is_completed()
        {
            this.AssertAllStagesStopped(() =>
            {
                var probe = TestPublisher.CreateManualProbe<int>(this);
                var queue = Source.FromPublisher(probe).RunWith(Sink.Queue<int>(), _materializer);
                var sub = probe.ExpectSubscription();

                queue.PullAsync().PipeTo(TestActor);
                sub.SendNext(1);
                ExpectMsg(new Option<int>(1));

                sub.SendComplete();
                var future = queue.PullAsync();
                future.Wait(_pause).Should().BeTrue();
                future.Result.Should().Be(Option<int>.None);

                ((Task)queue.PullAsync()).ContinueWith(t =>
                {
                    t.Exception.InnerException.Should().BeOfType<IllegalStateException>();
                }, TaskContinuationOptions.OnlyOnFaulted).Wait(TimeSpan.FromMilliseconds(300));
            }, _materializer);
        }