Akka.Cluster.Tests.MultiNode.MinMembersBeforeUpBase.TestWaitMovingMembersToUp C# (CSharp) Method

        protected void TestWaitMovingMembersToUp()
        {
            var onUpLatch = new TestLatch(1);
            Cluster.RegisterOnMemberUp(() =>
            {
                onUpLatch.CountDown();
            });

            RunOn(() =>
            {
                Cluster.Join(GetAddress(Myself));
                AwaitAssert(() =>
                {
                    ClusterView.RefreshCurrentState();
                    ClusterView.Status.ShouldBe(MemberStatus.Joining);
                });
            }, First);
            EnterBarrier("first-started");

            onUpLatch.IsOpen.ShouldBeFalse();

            RunOn(() =>
            {
                Cluster.Join(GetAddress(First));
            }, Second);

            RunOn(() =>
            {
                var expectedAddresses = new List<Address> { GetAddress(First), GetAddress(Second) };
                AwaitAssert(() =>
                {
                    ClusterView.RefreshCurrentState();
                    ClusterView.Members.Select(c => c.Address).Except(expectedAddresses).Count().ShouldBe(0);
                });
                ClusterView.Members.All(c => c.Status == MemberStatus.Joining).ShouldBeTrue();
                // and it should not change
                foreach (var _ in Enumerable.Range(1, 5))
                {
                    Thread.Sleep(1000);
                    ClusterView.Members.Select(c => c.Address).Except(expectedAddresses).Count().ShouldBe(0);
                    ClusterView.Members.All(c => c.Status == MemberStatus.Joining).ShouldBeTrue();
                }
            }, First, Second);
            EnterBarrier("second-joined");

            RunOn(() =>
            {
                Cluster.Join(GetAddress(First));
            }, Third);
            AwaitClusterUp(First, Second, Third);

            onUpLatch.Ready(TestKitSettings.DefaultTimeout);
            EnterBarrier("after-1");
        }
    }