带有 HttpContext 的 ASP.NET MVC 单元测试控制器 [英] ASP.NET MVC unit test controller with HttpContext

问题描述

我正在尝试为我的一个控制器编写单元测试以验证视图是否正确返回，但该控制器有一个访问 HttpContext.Current.Session 的基本控制器.每次我创建控制器的新实例时，都会调用 basecontroller 构造函数，并且测试失败并在 HttpContext.Current.Session 上出现空指针异常.代码如下:

I am trying to write a unit test for my one controller to verify if a view was returned properly, but this controller has a basecontroller that accesses the HttpContext.Current.Session. Everytime I create a new instance of my controller is calls the basecontroller constructor and the test fails with a null pointer exception on the HttpContext.Current.Session. Here is the code:

public class BaseController : Controller
{       
    protected BaseController()
    {
       ViewData["UserID"] = HttpContext.Current.Session["UserID"];   
    }
}

public class IndexController : BaseController
{
    public ActionResult Index()
    {
        return View("Index.aspx");
    }
}

    [TestMethod]
    public void Retrieve_IndexTest()
    {
        // Arrange
        const string expectedViewName = "Index";

        IndexController controller = new IndexController();

        // Act
        var result = controller.Index() as ViewResult;

        // Assert
        Assert.IsNotNull(result, "Should have returned a ViewResult");
        Assert.AreEqual(expectedViewName, result.ViewName, "View name should have been {0}", expectedViewName);
    }

关于如何模拟(使用 Moq)在基本控制器中访问的会话以便在后代控制器中运行测试的任何想法?

Any ideas on how to mock (using Moq) the Session that is accessed in the base controller so the test in the descendant controller will run?

推荐答案

如果您正在使用 Typemock，您可以这样做:

If you are using Typemock, you can do this:

Isolate.WhenCalled(()=>controller.HttpContext.Current.Session["UserID"])
.WillReturn("your id");

测试代码如下:

[TestMethod]
public void Retrieve_IndexTest()
{
    // Arrange
    const string expectedViewName = "Index";

    IndexController controller = new IndexController();
    Isolate.WhenCalled(()=>controller.HttpContext.Current.Session["UserID"])
    .WillReturn("your id");
    // Act
    var result = controller.Index() as ViewResult;

    // Assert
    Assert.IsNotNull(result, "Should have returned a ViewResult");
    Assert.AreEqual(expectedViewName, result.ViewName, "View name should have been {0}", expectedViewName);
}

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