C# 模拟HttpContext（会话）

我读过很多关于mvc中模拟的文章和博客。。。他们中的许多人都很有帮助，但我仍然有一些问题：

• 其中一个问题是，我需要在ActionResult中使用会话，但在测试中，当访问会话时，我会得到一个NullReferenceException

  public ActionResult Index()
  {
    if (Session["Something"] == null)
    {
      Session.Add("Something", <smth>);
    }
    else
    {
      Session["Something"] = <smth>;
    }
    return redirect to action("Index2");
  }
  

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您可以使用

此站点示例演示如何测试在会话中存储已发布表单值的操作

[Test]
public void AddSessionStarShouldSaveFormToSession()
{
    TestControllerBuilder builder = new TestControllerBuilder();
    StarsController controller = new StarsController();
    builder.InitializeController(controller);

    //note that this is assigned before the controller action. This simulates the server  filling out the form data from the request
    builder.Form["NewStarName"] = "alpha c";

    //this assumes that AddSessionStar takes the form data and adds it to the session
    controller.AddSessionStar();

    Assert.AreEqual("alpha c", controller.HttpContext.Session["NewStarName"]);
}

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这只是一个使用会话值的手动测试。。。我需要测试所有的结果。而不是会话是测试点。我需要执行此操作提供的路由（操作\查看名称）。。。我只有一个nullref例外。我需要一个方法，只提供一个未启动的操作来使用一个会话，它不是空的object@AkmecNurikTestHelper还将解决这个NullReference问题，TestControllerBuilder将为您填充模拟实现。

[Test]
public void AddSessionStarShouldSaveFormToSession()
{
    TestControllerBuilder builder = new TestControllerBuilder();
    StarsController controller = new StarsController();
    builder.InitializeController(controller);

    //note that this is assigned before the controller action. This simulates the server  filling out the form data from the request
    builder.Form["NewStarName"] = "alpha c";

    //this assumes that AddSessionStar takes the form data and adds it to the session
    controller.AddSessionStar();

    Assert.AreEqual("alpha c", controller.HttpContext.Session["NewStarName"]);
}