AsyncMediator.Test.MediatorTests.ExecuteDeferredEvents_CanAddFromMultipleThreads C# (CSharp) Method

        public async Task ExecuteDeferredEvents_CanAddFromMultipleThreads()
        {
            var handlerFactory = new MessageHandlerRegistry();
            var mediator = new Mediator(handlerFactory.MultiInstanceFactory, handlerFactory.SingleInstanceFactory);

            handlerFactory.AddHandlersForEvent(new List<IEventHandler<FakeEvent>>
            {
                _autoSubstitute.SubstituteFor<HandlerWithoutAdditionalEvents>()
            });

            var options = new ParallelOptions { MaxDegreeOfParallelism = 10 };

            //Make sure the mediator can handle events being added from multiple threads (should never lose events)
            Parallel.For(0, 10, options, i =>
            {
                for (var j = 0; j < 1000; ++j)
                    mediator.DeferEvent(new FakeEvent { Id = (i * 1000) + j });
            });

            await mediator.ExecuteDeferredEvents();

            foreach (var handler in handlerFactory.GetHandlersFor<FakeEvent>())
            {
                handler.Received(10000).Handle(Arg.Any<FakeEvent>()).FireAndForget();
            }
        }