Akka.Tests.Actor.SupervisorHierarchySpec.A_supervisor_hierarchy_must_handle_failure_in_creation_when_supervision_strategy_returns_Resume_and_Restart C# (CSharp) Method

        public void A_supervisor_hierarchy_must_handle_failure_in_creation_when_supervision_strategy_returns_Resume_and_Restart()
        {
            var createAttempt = new AtomicCounter(0);
            var preStartCalled = new AtomicCounter(0);
            var postRestartCalled = new AtomicCounter(0);

            EventFilter.Exception<Failure>()
                .And.Exception<InvalidOperationException>("OH NO!")
                .And.Error(start: "changing Recreate into Create")
                .And.Error(start: "changing Resume into Create")
                .Mute(() =>
                {
                    //Create:
                    // failresumer
                    //    |
                    // failingChild
                    //    | (sometimes)
                    // workingChild
                    var failresumer = ActorOf((resumerDsl, context) =>
                    {
                        resumerDsl.Strategy = new OneForOneStrategy(ex => ex is ActorInitializationException ? (createAttempt.Current % 2 == 0 ? Directive.Resume : Directive.Restart) : Directive.Escalate);
                        var failingChild = context.ActorOf((childDsl, childContext) =>
                        {
                            var ca = createAttempt.IncrementAndGet();
                            if (ca <= 6 && ca % 3 == 0)
                                childContext.ActorOf(BlackHoleActor.Props, "workingChild" + ca);
                            if (ca < 6)
                                throw new InvalidOperationException("OH NO!");
                            childDsl.OnPreStart = _ => preStartCalled.IncrementAndGet();
                            childDsl.OnPostRestart = (e, _) => postRestartCalled.IncrementAndGet();
                            childDsl.ReceiveAny((m, actorContext) => actorContext.Sender.Tell(m));
                        }, "failingChild");
                        resumerDsl.ReceiveAny((m, _) => failingChild.Forward(m));
                    }, "failresumer");

                    //Send failresumer some meatballs. This message will be forwarded to failingChild
                    failresumer.Tell("Köttbullar");
                    ExpectMsg("Köttbullar");
                });

            createAttempt.Current.ShouldBe(6);
            preStartCalled.Current.ShouldBe(1);
            postRestartCalled.Current.ShouldBe(0);
        }