Akka.Streams.Tests.Dsl.FlowWatchTerminationSpec.A_WatchTermination_must_complete_the_future_when_stream_is_cancelled_from_downstream C# (CSharp) Method

        public void A_WatchTermination_must_complete_the_future_when_stream_is_cancelled_from_downstream()
        {
            this.AssertAllStagesStopped(() =>
            {
                var t =
                    Source.From(Enumerable.Range(1, 4))
                        .WatchTermination(Keep.Right)
                        .ToMaterialized(this.SinkProbe<int>(), Keep.Both)
                        .Run(Materializer);
                var future = t.Item1;
                var p = t.Item2;

                p.Request(3).ExpectNext(1, 2, 3);
                p.Cancel();
                future.Wait(TimeSpan.FromSeconds(3)).Should().BeTrue();
            }, Materializer);
        }