Akka.Streams.Tests.IO.FileSinkSpec.SynchronousFileSink_should_allow_overriding_the_dispatcher_using_Attributes C# (CSharp) Méthode

        public void SynchronousFileSink_should_allow_overriding_the_dispatcher_using_Attributes()
        {
            this.AssertAllStagesStopped(() =>
            {
                TargetFile(f =>
                {
                    var sys = ActorSystem.Create("dispatcher_testing", Utils.UnboundedMailboxConfig);
                    var materializer = ActorMaterializer.Create(sys);

                    try
                    {
                        //hack for Iterator.continually
                        Source.FromEnumerator(() => Enumerable.Repeat(_testByteStrings.Head(), Int32.MaxValue).GetEnumerator())
                            .To(FileIO.ToFile(f))
                            .WithAttributes(ActorAttributes.CreateDispatcher("akka.actor.default-dispatcher"));
                        //.Run(materializer);

                        ((ActorMaterializerImpl)materializer).Supervisor.Tell(StreamSupervisor.GetChildren.Instance, TestActor);
                        var actorRef = ExpectMsg<StreamSupervisor.Children>().Refs.First(@ref => @ref.Path.ToString().Contains("File"));
                        Utils.AssertDispatcher(actorRef, "akka.actor.default-dispatcher");
                    }
                    finally
                    {
                        Shutdown(sys);
                    }
                });
            }, _materializer);
        }