public void executing_message_handler_without_registering_should_throw_an_exception()
{
var executor = new MessageHandlerExecutor(new PoorMansDependencyInjection());
Func <Task> action = () => executor.Execute(new AppleCommand(), Substitute.For <IMessageContext>(), new System.Threading.CancellationToken());
action.ShouldThrow <TypeAccessException>();
}
public MessageHandlerAction(Type?handlerType)
{
HandlerType = handlerType ?? throw new ArgumentNullException(nameof(handlerType));
HandlerParameterType = handlerType.GetGenericInterfaceParameters(typeof(IMessageHandler <>))?.Single()
?? throw new ArgumentException("Cannot find generic parameter type.");
Executor = new MessageHandlerExecutor(HandlerType, HandlerParameterType);
_objectFactory = ActivatorUtilities.CreateFactory(handlerType, Type.EmptyTypes);
Attributes = handlerType.GetCustomAttributes(false).Cast <Attribute>().AsEnumerable();
}
public void executing_message_handler_without_registering_should_throw_an_exception()
{
var serviceProvider = new ServiceCollection()
.BuildServiceProvider();
var executor = new MessageHandlerExecutor(new MicrosoftDependencyInjectionDependencyResolver(serviceProvider));
Func <Task> action = () => executor.Execute(new AppleCommand(), Substitute.For <IMessageContext>(), new System.Threading.CancellationToken());
action.ShouldThrow <TypeAccessException>();
}
public void register_message_handler_as_an_indirect_implementation_should_resolve_and_execute()
{
var dependencyInjection = new PoorMansDependencyInjection();
dependencyInjection.AddMessageHandler(() => new BananaCommandHandler());
var executor = new MessageHandlerExecutor(dependencyInjection);
var task = executor.Execute(new BananaCommand(), Substitute.For <IMessageContext>(), new System.Threading.CancellationToken());
task.IsCompleted.Should().BeTrue();
}
public void register_message_handler_as_an_indirect_implementation_should_resolve_and_execute()
{
var serviceProvider = new ServiceCollection()
.AddScoped <IMessageHandler <BananaCommand>, BananaCommandHandler>()
.BuildServiceProvider();
var executor = new MessageHandlerExecutor(new MicrosoftDependencyInjectionDependencyResolver(serviceProvider));
var task = executor.Execute(new BananaCommand(), Substitute.For <IMessageContext>(), new System.Threading.CancellationToken());
task.IsCompleted.Should().BeTrue();
}
void given(IMessageHandler <AppleCommand> handler)
{
Func <MessageHandlingExceptionRaisedEventArgs, Task> exceptionHandler = a =>
{
exception = a.Exception;
return(Task.CompletedTask);
};
var dependencyResolver = Substitute.For <IDependencyResolver>();
dependencyResolver.CreateScope().Resolve(Arg.Any <Type>()).ReturnsForAnyArgs(handler);
executor = new MessageHandlerExecutor(dependencyResolver, exceptionHandler);
}
public void thrown_exception_in_message_handler_should_call_exception_handler_and_throw()
{
Exception exception = null;
Func <MessageHandlingExceptionRaisedEventArgs, Task> exceptionHandler = a =>
{
exception = a.Exception;
return(Task.CompletedTask);
};
var dependencyInjection = new PoorMansDependencyInjection();
dependencyInjection.AddMessageHandler(() => new RottenAppleCommandHandler());
var executor = new MessageHandlerExecutor(dependencyInjection, exceptionHandler);
Func <Task> action = () => executor.Execute(new AppleCommand(), Substitute.For <IMessageContext>(), new System.Threading.CancellationToken());
action.ShouldThrow <Exception>();
exception.Message.Should().Be("Rotten Apple");
}
public void thrown_exception_in_message_handler_should_call_exception_handler_and_throw()
{
Exception exception = null;
Func <MessageHandlingExceptionRaisedEventArgs, Task> exceptionHandler = a =>
{
exception = a.Exception;
return(Task.CompletedTask);
};
var serviceProvider = new ServiceCollection()
.AddScoped <IMessageHandler <AppleCommand>, RottenAppleCommandHandler>()
.BuildServiceProvider();
var executor = new MessageHandlerExecutor(new MicrosoftDependencyInjectionDependencyResolver(serviceProvider), exceptionHandler);
Func <Task> action = () => executor.Execute(new AppleCommand(), Substitute.For <IMessageContext>(), new System.Threading.CancellationToken());
action.ShouldThrow <Exception>();
exception.Message.Should().Be("Rotten Apple");
}
protected void given_dependency_resolver(IDependencyResolver dependencyResolver) => messageHandlerExecutor = new MessageHandlerExecutor(dependencyResolver);
