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

        public async Task Commands_WhenExecuting_CanHandleValidationErrors()
        {
            // Arrange
            var handlerFactory = new MessageHandlerRegistry();
            var mediator = new Mediator(handlerFactory.MultiInstanceFactory, handlerFactory.SingleInstanceFactory);
            handlerFactory.AddHandlersForCommandOrQuery<ICommandHandler<TestCommand>>(new TestCommandHandler(mediator));

            // Act
            var result = await mediator.Send(new TestCommand { Id = 999 });

            // Assert
            Assert.IsTrue(result.ValidationResults.Any());
        }