Akka.Cluster.Tests.MultiNode.LeaderLeavingSpecConfig.LeaderLeavingSpec.A_leader_that_is_leaving_must_be_moved_to_leaving_then_exiting_then_removed_then_be_shut_down_and_then_a_new_leader_should_be_elected C# (CSharp) Method

                A_leader_that_is_leaving_must_be_moved_to_leaving_then_exiting_then_removed_then_be_shut_down_and_then_a_new_leader_should_be_elected
                ()
            {
                AwaitClusterUp(_config.First, _config.Second, _config.Third);

                var oldLeaderAddress = ClusterView.Leader;

                Within(TimeSpan.FromSeconds(30), () =>
                {
                    if (ClusterView.IsLeader)
                    {
                        EnterBarrier("registered-listener");

                        Cluster.Leave(oldLeaderAddress);
                        EnterBarrier("leader-left");

                        // verify that the LEADER is shut down
                        AwaitCondition(() => Cluster.IsTerminated);
                        EnterBarrier("leader-shutdown");
                    }
                    else
                    {
                        var exitingLatch = new TestLatch();

                        var listener = Sys.ActorOf(Props.Create(() => new Listener(oldLeaderAddress, exitingLatch)).WithDeploy(Deploy.Local));

                        Cluster.Subscribe(listener, new []{typeof(ClusterEvent.IMemberEvent)});

                        EnterBarrier("registered-listener");

                        EnterBarrier("leader-left");

                        // verify that the LEADER is EXITING
                        exitingLatch.Ready(TestLatch.DefaultTimeout);

                        EnterBarrier("leader-shutdown");
                        MarkNodeAsUnavailable(oldLeaderAddress);

                        // verify that the LEADER is no longer part of the 'members' set
                        AwaitAssert(() => ClusterView.Members.Select(m => m.Address).Contains(oldLeaderAddress).ShouldBeFalse());

                        // verify that the LEADER is not part of the 'unreachable' set
                        AwaitAssert(() => ClusterView.UnreachableMembers.Select(m => m.Address).Contains(oldLeaderAddress).ShouldBeFalse());

                        // verify that we have a new LEADER
                        AwaitAssert(() => ClusterView.Leader.ShouldNotBe(oldLeaderAddress));
                    }

                    EnterBarrier("finished");
                });
            }
        }