使用mock框架(Moq)进行MVC测试

问题:用户代码未处理ArgumentException。无法获取StrongNameKeyPair的公钥

HomeController CreateHomeControllerAs(string userName)
    {
        var mock = new Mock<ControllerContext>();
        mock.SetupGet(p => p.HttpContext.User.Identity.Name).Returns(userName); // fails here
        mock.SetupGet(p => p.HttpContext.Request.IsAuthenticated).Returns(true);

        var controller = new HomeController();
        controller.ControllerContext = mock.Object;

        return controller;
    }

    [TestMethod]
    public void should_be_able_to_get_to_index_page_logged_in()
    {
        HomeController controller = CreateHomeControllerAs("dave");
    }

正在使用Moq引用。。。WinXP下的VS2010。