CK.Core.Tests.Monitoring.SystemActivityMonitorTests.OnErrorEventIsSecured C# (CSharp) Method

        public void OnErrorEventIsSecured()
        {
            int eventHandlerCount = 0;
            int buggyEventHandlerCount = 0;

            var hGood = new EventHandler<SystemActivityMonitor.LowLevelErrorEventArgs>( ( sender, e ) => { ++eventHandlerCount; } );
            var hBad = new EventHandler<SystemActivityMonitor.LowLevelErrorEventArgs>( ( sender, e ) => { ++buggyEventHandlerCount; throw new Exception( "From buggy handler." ); } );
            SystemActivityMonitor.OnError += hGood;
            SystemActivityMonitor.OnError += hBad;
            try
            {
                ActivityMonitor.CriticalErrorCollector.Add( new CKException( "The-Test-Exception-Message" ), "First call to SystemActivityMonitorTests.OnErrorEventIsSecured" );
                ActivityMonitor.CriticalErrorCollector.WaitOnErrorFromBackgroundThreadsPending();
                Assert.That( eventHandlerCount, Is.EqualTo( 2 ), "We also received the error of the buggy handler :-)." );
                Assert.That( buggyEventHandlerCount, Is.EqualTo( 1 ) );

                ActivityMonitor.CriticalErrorCollector.Add( new CKException( "The-Test-Exception-Message" ), "Second call to SystemActivityMonitorTests.OnErrorEventIsSecured" );
                ActivityMonitor.CriticalErrorCollector.WaitOnErrorFromBackgroundThreadsPending();
                Assert.That( eventHandlerCount, Is.EqualTo( 3 ) );
                Assert.That( buggyEventHandlerCount, Is.EqualTo( 1 ) );
            }
            finally
            {
                SystemActivityMonitor.OnError -= hGood;
                SystemActivityMonitor.OnError -= hBad;
            }
        }