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如何让单元测试在ASP.NET MVC中使用路由?

moq unit-testing asp.net-mvc

mkedobbs · 技术社区 · 15 年前

我正在编写针对我的ASP.NET MVC应用程序的单元测试,特别是我正在测试我编写的HTMLHelper扩展方法。扩展方法中有一行:

var innerHtml = htmlHelper.ActionLink(text, action, controller, routeValues, null);

当我在单元测试中运行这个函数时,生成的URL的href是空白的,而不管传入的操作或控制器是什么。

这是我的单元测试:

var page = CreateProductDataPage(); //returns ProductDataPage object
var htmlHelper = Http.CreateHtmlHelperWithMocks<ProductDataPage>(new ViewDataDictionary<ProductDataPage>(page), false);
var result = htmlHelper.ProductListingBreadcrumb(true, null, null);

下面是CreateHTMLHelperWithMocks方法:

public static HtmlHelper<T> CreateHtmlHelperWithMocks<T>(ViewDataDictionary<T> viewData, bool isLoggedIn) where T : class
{
    var mockViewDataContainer = new Mock<IViewDataContainer>();
    mockViewDataContainer.SetupGet(v => v.ViewData).Returns(viewData);

    return new HtmlHelper<T>(GetViewContextMock(viewData, isLoggedIn).Object, mockViewDataContainer.Object);
}

最后,这里是getViewContextMock方法:

public static Mock<ViewContext> GetViewContextMock(ViewDataDictionary viewData, bool isLoggedIn)
{
    var mock = new Mock<ViewContext>();

    mock.SetupGet(v => v.HttpContext).Returns(GetHttpContextMock(isLoggedIn).Object);
    mock.SetupGet(v => v.Controller).Returns(new Mock<ControllerBase>().Object);
    mock.SetupGet(v => v.View).Returns(new Mock<IView>().Object);
    mock.SetupGet(v => v.ViewData).Returns(viewData);
    mock.SetupGet(v => v.TempData).Returns(new TempDataDictionary());
    mock.SetupGet(v => v.RouteData).Returns(new RouteData());

    return mock;
}

2 回复 | 直到 15 年前

mkedobbs 15 年前

更新:解决了。美元真是太贵了。万一有人想这么做…

第一步是在创建mock htmlhelper时添加global.asax中的路由集合。

    public static HtmlHelper<T> CreateHtmlHelperWithMocks<T>(ViewDataDictionary<T> viewData, bool isLoggedIn) where T : class
    {
        var mockViewDataContainer = new Mock<IViewDataContainer>();
        mockViewDataContainer.SetupGet(v => v.ViewData).Returns(viewData);

        //These next two lines are key:
        var routeCollection = new RouteCollection();
        MvcApplication.RegisterRoutes(routeCollection);

        return new HtmlHelper<T>(GetViewContextMock(viewData, isLoggedIn).Object, mockViewDataContainer.Object, routeCollection);
    }

然后,我必须确保httpContext模拟的结果是为请求返回的 应用路径 属性和响应 应用程序路径修改器 方法。

    public static Mock<HttpContextBase> GetHttpContextMock(bool isLoggedIn)
    {
        var context = new Mock<HttpContextBase>();
        var request = new Mock<HttpRequestBase>();
        var response = new Mock<HttpResponseBase>();
        var session = new Mock<HttpSessionStateBase>();
        var server = new Mock<HttpServerUtilityBase>();
        var principal = AuthenticationAndAuthorization.GetPrincipleMock(isLoggedIn);

        //These next two lines are required for the routing to generate valid URLs, apparently:
        request.SetupGet(r => r.ApplicationPath).Returns("/");
        response.Setup(r => r.ApplyAppPathModifier(It.IsAny<string>())).Returns((string r) => r);

        context.SetupGet(c => c.Request).Returns(request.Object);
        context.SetupGet(c => c.Response).Returns(response.Object);
        context.SetupGet(c => c.Session).Returns(session.Object);
        context.SetupGet(c => c.Server).Returns(server.Object);
        context.SetupGet(c => c.User).Returns(principal.Object);

        return context;
    }

tvanfosson 15 年前

我在博客上写了关于和犀牛一起做这个的事。大约一个月前嘲弄过。有关我如何处理此问题的更多信息,请访问 http://farm-fresh-code.blogspot.com/2009/10/mocking-htmlhelper-class-with.html .基本上,我的解决方案是提供模拟中的所有内容,包括路由数据和通过连接到模拟助手的响应对象上的ApplyAppPathModifier。实际上,它更像是一个基于底层存根的假助手。