正在尝试 Unity IoC,在使用基于构造函数的 DI 之后。 问题是试图让集成测试工作。
http://patrick.lioi.net/2013/06/20/streamlined-integration-tests/
“运行集成测试应该尽可能多地测试真实系统”
上面的 Patrick 描述了在 MVC 单元测试项目中设置 IoC.. 但我不知道如何实现
public class HomeController : Controller
{
readonly IWinterDb db;
// Unity knows that if IWinterDb interface is asked for, it will inject in a new WinterDb()
public HomeController(IWinterDb db)
{
this.db = db;
}
public ActionResult Index()
{
var stories = db.Query<Story>()
.OrderByDescending(s => s.Rating)
.Include(s => s.StoryType);
return View(stories);
}
单元测试没问题,传入一个假的:
[TestMethod]
public void Index_GivenFake_ShouldReturn100Stories()
{
var db = new FakeWinterDb();
db.AddSet(TestData.Stories);
var controller = new HomeController(db);
var result = controller.Index() as ViewResult;
var model = result.Model as IEnumerable<Story>;
Assert.AreEqual(100, model.Count());
}
但是我喜欢测试整个堆栈的集成测试:
//Integration tests depend on the test data inserted in migrations
[TestClass]
public class HomeControllerTestsIntegration
{
[TestMethod]
public void Index_GivenNothing_ResultShouldNotBeNull()
{
var controller = new HomeController();
var result = controller.Index() as ViewResult;
Assert.IsNotNull(result);
}
问题:这不会编译(因为没有无参数构造函数)。并且没有调用 Unity 为 HomeController 注入(inject)正确的依赖项。
Unity 接线:
public static class UnityConfig
{
public static void RegisterComponents()
{
var container = new UnityContainer();
// register all your components with the container here
// it is NOT necessary to register your controllers
container.RegisterType<IWinterDb, WinterDb>();
// for authentication
container.RegisterType<AccountController>(new InjectionConstructor());
DependencyResolver.SetResolver(new UnityDependencyResolver(container));
}
}
编辑1:
[TestMethod]
public void Index_GivenNothing_ResultShouldNotBeNull()
{
UnityConfig.RegisterComponents();
var controller = UnityConfig.container.Resolve<HomeController>();
var result = controller.Index() as ViewResult;
Assert.IsNotNull(result);
}
确保单例存在。
public static class UnityConfig
{
public static UnityContainer container;
public static void RegisterComponents()
{
container = new UnityContainer();
// register all your components with the container here
// it is NOT necessary to register your controllers
//container.RegisterType<IWinterDb, WinterDb>();
container.RegisterTypes(
AllClasses.FromLoadedAssemblies(),
WithMappings.FromMatchingInterface, // Convention of an I in front of interface name
WithName.Default
); // Default not a singleton in Unity
// for authentication
container.RegisterType<AccountController>(new InjectionConstructor());
DependencyResolver.SetResolver(new UnityDependencyResolver(container));
}
}
将Unity暴露给测试项目
最佳答案
您需要通过容器来解析您的 Controller ,以便 Unity 为您解析依赖关系。
它可能就像替换这个一样简单:
var controller = new HomeController();
用这个:
var controller = container.Resolve<HomeController>();
您显然需要将您的容器暴露给您的测试类。这是您在连接生产代码时通常不会做的事情。
关于c# - 使用 Unity IoC 进行 MVC 集成测试,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/21263197/