Question

在ViewComponent对象中，HttpContext和User是只读属性。

如何对这样的组件进行单元测试？

我正在使用MSTest Freamwork。

以下属性用于我的代码

曲奇
会话
用户（System.Security.Principal）

public ViewViewComponentResult Invoke()
{
    var vm = new SummaryViewModel();
    if (User.Identity is ClaimsIdentity identity && identity.IsAuthenticated)
    {
        vm.IsAuthenticated = true;
        vm.UserName = identity.Claims.FirstOrDefault(c => c.Type == "UserName").Value;
        vm.PhotoUrl = identity.Claims.FirstOrDefault(c => c.Type == "FacePicture").Value;
    }
    return View(vm);
}

[TestMethod]
public void UserSummaryVcTest()
{
    var component = new UserSummaryViewComponent();
    var model = component.Invoke().ViewData.Model as SummaryViewModel;
    Assert.AreEqual("UserName", model.UserName);
}

Answer 1

根据源代码，ViewComponent依赖于ViewComponentContext.ViewContext来公开那些只读属性，而这些属性又会访问HttpContext。这是模拟所需值的切入点。

[TestMethod]
public void UserSummaryVcTest() {

    // Arrange
    var expected = "Username value";
    var httpContext = new DefaultHttpContext(); //You can also Mock this
    //...then set user and other required properties on the httpContext as needed

    var viewContext = new ViewContext();
    viewContext.HttpContext = httpContext;
    var viewComponentContext = new ViewComponentContext();
    viewComponentContext.ViewContext = viewContext;

    var viewComponent = new UserSummaryViewComponent();
    viewComponent.ViewComponentContext = viewComponentContext;

    //Act
    var model = viewComponent.Invoke().ViewData.Model as SummaryViewModel;

    //Assert
    Assert.AreEqual(expected, model.UserName);
}

Answer 2

这里只是异步示例，

 PYTHONPATH=<directory to mock>/mock:$PYTHONPATH <command to run unittests>

如何单元测试ViewComponent.Invoke（）？

2 个答案: