Switching to AutofacWebApiDependencyResolver from MVC DependencyResolver - where is .Current located?

Question

AutoFac worked with MVC4 for me. I am trying to migrate to Web API 2. Here is what I got to configure AutoFac:

public class AutofacRegistrations
{
    public static void RegisterAndSetResolver()
    {
        // Create the container builder.
        var containerBuilder = new ContainerBuilder();

        // Register the Web API controllers.
        containerBuilder.RegisterApiControllers(Assembly.GetExecutingAssembly());

        //  Only generate one SessionFactory ever because it is expensive.
        containerBuilder.Register(x => new NHibernateConfiguration().Configure().BuildSessionFactory()).SingleInstance();

        //  Everything else wants an instance of Session per HTTP request, so indicate that:
        containerBuilder.Register(x => x.Resolve<ISessionFactory>().OpenSession()).InstancePerApiRequest();
        containerBuilder.Register(x => LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType)).InstancePerApiRequest();

        containerBuilder.RegisterType<NHibernateDaoFactory>().As<IDaoFactory>().InstancePerApiRequest();
        containerBuilder.RegisterType<StreamusManagerFactory>().As<IManagerFactory>().InstancePerApiRequest();

        // Build the container.
        ILifetimeScope container = containerBuilder.Build();

        // Create the depenedency resolver.
        var dependencyResolver = new AutofacWebApiDependencyResolver(container);

        // Configure Web API with the dependency resolver.
        GlobalConfiguration.Configuration.DependencyResolver = dependencyResolver;
    }
}

I am sure that everything is correct. My problem arises when I try to configure some test cases. My base class for my test cases is not a controller, so it does not automatically pass anything. In MVC4, I did the following:

[SetUp]
public void SetUp()
{
    HttpSimulator = new HttpSimulator().SimulateRequest();

    Logger = DependencyResolver.Current.GetService<ILog>();
    DaoFactory = DependencyResolver.Current.GetService<IDaoFactory>();
    Session = DependencyResolver.Current.GetService<ISession>();
    ManagerFactory = DependencyResolver.Current.GetService<IManagerFactory>();
}

[TearDown]
public void TearDown()
{
    HttpSimulator.Dispose();
}

Unfortunately, there is no DependencyResolver.Current in the WebAPI . So I wondered how to do it right?

It builds, but is NOT correct. I got the message "Session closed!" when I try to run a test case:

[SetUp]
public void SetUp()
{
    using (var scope = GlobalConfiguration.Configuration.DependencyResolver.BeginScope())
    {
        //  TODO: Consider initializing Helpers during setup to keep this DRY.
        Logger = (ILog)scope.GetService(typeof(ILog));
        DaoFactory = (IDaoFactory)scope.GetService(typeof(IDaoFactory));
        Session = (ISession)scope.GetService(typeof(ISession));
        ManagerFactory = (IManagerFactory)scope.GetService(typeof(IManagerFactory));
    }
}

Answer 1

WebAPI , HttpRequestMessage. .

System.Net.Http.HttpRequestMessageExtensions.GetDependencyScope.

, WebAPI, , , /resolver .

:

• HttpRequestMessage .
• teardown HttpRequestMessage, , , .. .
• HttpRequestMessage.GetDependencyScope(), -, / .

, :

private HttpRequestMessage _request;

[SetUp]
public void SetUp()
{
  var builder = new ContainerBuilder();
  // Register stuff.
  var container = builder.Build();
  var resolver = new AutofacWebApiDependencyResolver(container);

  var config = new HttpConfiguration();
  config.DependencyResolver = resolver;
  config.EnsureInitialized();

  this._request = new HttpRequestMessage();
  this._request.SetConfiguration(config);
}

[TearDown]
public void TearDown()
{
  this._request.Dispose();
}

[Test]
public void Test()
{
  // When you need to resolve something, use the request message
  this._request.GetDependencyScope().GetService(typeof(TheThing));
}

, .

, , - , - , . , GetDependencyScope , , , .

, :

• Autofac, ​​ RegisterAndSetResolver, , .
• RegisterAndSetResolver, , HttpConfiguration, WebApiConfig.Register , WebAPI. HttpConfiguration .
• , unit test, - " ". , , , , " ".

, HttpRequestMessage - WebAPI.