Akka.Cluster.Tests.MultiNode.InitialHeartbeatMultiNodeConfig.InitialHeartbeatSpec.A_member_must_detect_failure_even_though_no_heartbeats_have_been_received C# (CSharp) Method

            public void A_member_must_detect_failure_even_though_no_heartbeats_have_been_received()
            {
                var firstAddress = GetAddress(_config.First);
                var secondAddress = GetAddress(_config.Second);

                AwaitClusterUp(_config.First);

                RunOn(() =>
                    AwaitAssert(() =>
                    {
                        Cluster.SendCurrentClusterState(TestActor);
                        Assert.True(
                            ExpectMsg<ClusterEvent.CurrentClusterState>()
                                .Members.Select(m => m.Address)
                                .Contains(secondAddress));
                    }, TimeSpan.FromSeconds(20), TimeSpan.FromMilliseconds(50))
                    , _config.First);

                RunOn(() =>
                {
                    Cluster.Join(GetAddress(_config.First));
                    AwaitAssert(() =>
                    {
                        Cluster.SendCurrentClusterState(TestActor);
                        Assert.True(
                            ExpectMsg<ClusterEvent.CurrentClusterState>()
                                .Members.Select(m => m.Address)
                                .Contains(firstAddress));
                    }, TimeSpan.FromSeconds(20), TimeSpan.FromMilliseconds(50));
                }, _config.Second);

                //TODO: Seem to be able to pass barriers once other node fails?
                EnterBarrier("second-joined");

                return;

                // It is likely that second has not started heartbeating to first yet,
                // and when it does the messages doesn't go through and the first extra heartbeat is triggered.
                // If the first heartbeat arrives, it will detect the failure anyway but not really exercise the
                // part that we are trying to test here.
                RunOn(
                    () =>
                        TestConductor.Blackhole(_config.First, _config.Second, ThrottleTransportAdapter.Direction.Both)
                            .Wait(), _config.Controller);

                RunOn(
                    () => AwaitCondition(
                        () => !Cluster.FailureDetector.IsAvailable(GetAddress(_config.First))
                        , TimeSpan.FromSeconds(15))
                    , _config.Second);

                EnterBarrier("after-1");
            }
        }