autofac container test

using System.Linq;
using Autofac;
using Autofac.Builder;
using Autofac.Core;
using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace Tests
{
    [TestClass]
    public class When_container_builder_is_build
    {
        private IContainer _container;
        private ContainerBuilder _containerBuilder;

        protected override void Given()
        {
            _containerBuilder = containerBuilderFactory.GetContainerBuilder();            
        }

        protected override void When()
        {
            _container = _containerBuilder.Build(ContainerBuildOptions.IgnoreStartableComponents);
        }

        [TestMethod]
        public void Then_should_be_able_to_resolve_dependency_tree()
        {            
            var servicesToCheck = _container.ComponentRegistry.Registrations.SelectMany(registration => registration.Services.OfType<IServiceWithType>());

            foreach (var service in servicesToCheck)
            {
                CheckTypedService(service, _container);
                CheckKeyedService(service, _container);
            }            
        }

        private static void CheckKeyedService(IServiceWithType service, IComponentContext context)
        {
            var keyedService = service as KeyedService;
            if (keyedService != null)
            {
                context.ResolveKeyed(keyedService.ServiceKey, keyedService.ServiceType);
            }
        }

        private static void CheckTypedService(IServiceWithType service, IComponentContext context)
        {
            var typedService = service as TypedService;
            if (typedService != null)
            {
                context.Resolve(typedService.ServiceType);
            }
        }


    }


}