CK.Core.Tests.Monitoring.ActivityMonitorMultiThreadTests.buggy_clients_are_removed_from_Output C# (CSharp) Method

        public void buggy_clients_are_removed_from_Output()
        {
            ActivityMonitor.AutoConfiguration = null;
            ActivityMonitor monitor = new ActivityMonitor();

            int clientCount = 0;
            if( TestHelper.LogsToConsole )
            {
                ++clientCount;
                monitor.Output.RegisterClient( new ActivityMonitorConsoleClient() );
            }
            ++clientCount;
            WaitActivityMonitorClient client = monitor.Output.RegisterClient( new WaitActivityMonitorClient() );

            Assert.That( monitor.Output.Clients.Count, Is.EqualTo( clientCount ) );

            try
            {
                Task.Factory.StartNew( () =>
                {
                    monitor.Info().Send( "Test must work in task" );
                } );

                client.WaitForOnUnfilteredLog();

                Assert.That( () => monitor.Info().Send( "Test must fail" ),
                    Throws.TypeOf( typeof( InvalidOperationException ) ).
                        And.Message.EqualTo( Impl.ActivityMonitorResources.ActivityMonitorConcurrentThreadAccess ) );
                
                Assert.That( monitor.Output.Clients.Count, Is.EqualTo( clientCount ), "Still " + clientCount + ": Concurrent call: not the fault of the Client." );
            }
            finally
            {
                client.Free();
            }

            Thread.Sleep( 50 );
            monitor.Info().Send( "Test must work after task" );

            ++clientCount;
            monitor.Output.RegisterClient( new ActionActivityMonitorClient( () =>
            {
                Assert.That( () => monitor.Info().Send( "Test must fail reentrant client" ),
                    Throws.TypeOf( typeof( InvalidOperationException ) ).
                        And.Message.EqualTo( Impl.ActivityMonitorResources.ActivityMonitorReentrancyError ) );
            } ) );

            monitor.Info().Send( "Test must work after reentrant client" );
            Assert.That( monitor.Output.Clients.Count, Is.EqualTo( clientCount ), "The RegisterClient action above is ok: it checks that it triggered a reentrant call." );

            ++clientCount;
            monitor.Output.RegisterClient( new ActionActivityMonitorClient( () =>
            {
                monitor.Info().Send( "Test must fail reentrant client" );
            } ) );

            monitor.Info().Send( "Test must work after reentrant client" );
            Assert.That( monitor.Output.Clients.Count, Is.EqualTo( clientCount - 1 ), "The BUGGY RegisterClient action above is NOT ok: it triggers a reentrant call exception => We have removed it." );

        }