Question

我正在使用ASP.NET MVC 3和NUnit。

我创建了一个辅助方法来返回一个动作方法（重载方法）：

public static object CategoryIndex(this UrlHelper urlHelper)
{
   return new { controller = "Category", action = "Index" };
}

public static string CategoryIndex(this UrlHelper helper, int categoryId)
{
   return helper.RouteUrl(new { controller = "Category", action = "Index", id = categoryId });
}

失败的测试是第二个名为CategoryIndex_should_navigate_to_category_index_action_method_with_child_category_id()的测试。

private HttpContextBase httpContextBaseStub;
private RequestContext requestContext;
private UrlHelper urlHelper;

[SetUp]
public void SetUp()
{
   httpContextBaseStub = MockRepository.GenerateStub<HttpContextBase>();
   requestContext = new RequestContext(httpContextBaseStub, new RouteData());
   urlHelper = new UrlHelper(requestContext);
}

[Test]
public void CategoryIndex_should_navigate_to_category_index_action_method()
{
   // Act
   object actual = UrlHelperNavigationExtensions.CategoryIndex(urlHelper);

   // Assert
   RouteValueDictionary routes = new RouteValueDictionary(actual);

   Assert.AreEqual("Category", routes["controller"]);
   Assert.AreEqual("Index", routes["action"]);
}

[Test]
public void CategoryIndex_should_navigate_to_category_index_action_method_with_child_category_id()
{
   // Arrange
   int childCategoryId = 1;

   // Act
   string actual = UrlHelperNavigationExtensions.CategoryIndex(urlHelper, childCategoryId);

   // Assert
   Assert.AreEqual("/Category/Index/1", actual);
}

抱怨实际为空。为什么会这样，我将如何纠正它？

Answer 1

在我看来，你没有初始化routecollection。我觉得这样的事情可以解决问题

[SetUp]
public void SetUp()
{
   RouteCollection routes = new RouteCollection();
   MvcApplication.RegisterRoutes(routes);

   httpContextBaseStub = MockRepository.GenerateStub<HttpContextBase>();
   requestContext = new RequestContext(httpContextBaseStub, new RouteData());

   //urlHelper = new UrlHelper(requestContext);
   urlHelper = new UrlHelper(requestContext, routes);
}

似乎也没有设置HttpContextBase。一定要正确地模拟它，否则你会得到一些空的引用异常。

[SetUp]
public void SetUp()
{
  RouteCollection routes = new RouteCollection();
  MvcApplication.RegisterRoutes(routes);

  //httpContextBaseStub = (new Moq.Mock<HttpContextBase>()).Object;

  var request = new Mock<HttpRequestBase>();
  var response = new Mock<HttpResponseBase>();
  response.Setup(r => r.ApplyAppPathModifier(It.IsAny<string>())).Returns((String url) => url);
  var mockHttpContext = new Mock<HttpContextBase>();
  mockHttpContext.Setup(c => c.Request).Returns(request.Object);
  mockHttpContext.Setup(c => c.Response).Returns(response.Object);
  requestContext = new RequestContext(mockHttpContext.Object, new RouteData());

  urlHelper = new UrlHelper(requestContext, routes);
}

Answer 2

我的猜测是因为路由表是空的，所以它不知道如何生成URL。

添加普通/ {controller} / {action}路由，它应该可以正常工作。

（如果这是错误的话我会打电话原谅）

你需要存根一个IRouteHandler实现，我在这里称之为stub_handler。

RouteTable.Routes.Add(new Route
(
     "{controller}/{action}/{id}"
     , stub_handler
);

返回字符串时，URL帮助程序方法测试失败

2 个答案: