单元测试ASP.Net MVC Authorize属性以验证重定向到登录页面

[TestMethod]
public void AuthorizeAttribute_Redirects_To_Login_Page_If_User_Is_Not_Authenticated()
{
    // Arrange
    var controller = new HomeController();
    var context = new ControllerContext();
    context.HttpContext = new MockHttpContext();
    controller.ControllerContext = context;

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

    // Assert
    Assert.IsNotNull(result);
    Assert.AreEqual("Login", result.RouteValues["action"]);
    Assert.AreEqual("Account", result.RouteValues["controller"]);
}