如何进行单元测试以在 ASP.NET MVC 中使用路由？

using System.Web.Mvc;
using System.Web.Routing;
using Microsoft.VisualStudio.TestTools.UnitTesting;

[TestClass]
public class RouteTests
{
    [TestMethod]
    public void Test_Default_Route()
    {
        // 创建 RouteCollection 对象并注册默认路由
        RouteCollection routes = new RouteCollection();
        routes.MapRoute(
            name: "Default",
            url: "{controller}/{action}/{id}",
            defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
        );

        // 创建 UrlHelper 对象并生成 URL
        UrlHelper urlHelper = new UrlHelper(new RequestContext(new HttpContextWrapper(new HttpContextStub()), new RouteData()), routes);
        string url = urlHelper.Action("Index", "Home");

        // 使用断言验证生成的 URL 是否符合预期
        Assert.AreEqual("/Home/Index", url);
    }
}