c# – 在单元测试期间渲染视图 – ControllerContext.DisplayMode

概述我正在研究一个生成大而复杂的报告的ASP.NET MVC 4 Web应用程序.我想编写单元测试来渲染视图,以确保视图不会爆炸,具体取决于模型： [Test] public void ExampleTest(){ var reportModel = new ReportModel(); var reportHtml = RenderRazo 我正在研究一个生成大而复杂的报告的ASP.NET MVC 4 Web应用程序.我想编写单元测试来渲染视图,以确保视图不会爆炸,具体取决于模型：

[Test] public voID Exampletest(){                       var reportModel = new ReportModel();     var reportHTML = RenderRazorVIEw(           @"..\..\Report.Mvc\VIEws\Report\Index.csHTML",reportModel);     Assert.IsFalse(         string.IsNullOrEmpty(reportHTML),"VIEw Failed to Render!");           } public string RenderRazorVIEw(string vIEwPath,object model){    //WHAT GOES HERE? }

我已经在网络上看到了很多有关这方面的信息,但它要么反对测试竞争,要么只能在Web请求的上下文中使用.

> Arguing Against – Unit Testing the Views? – 结论是视图中没有逻辑,所以你只需要测试编译.我认为测试VIEw是有价值的,以确保没有Null引用异常,显示正确的部分等.
> Web请求的上下文 – Render a view as a string – 这是为了呈现要在电子邮件中发送的视图.但是这种方法需要通过Web请求(即有效的httpContextBase)进行调用.

我一直在努力使Render a view as a string适应Mocked httpContextBase,但在使用Mocked ControllerContext时遇到了问题：

Object reference not set to an instance of an object.
at System.Web.WebPages.displayModeProvIDer.GetdisplayMode(httpContextBase context)
at System.Web.Mvc.ControllerContext.get_displayMode()
at System.Web.Mvc.VirtualPathProvIDerVIEwEngine.GetPath(ControllerContext controllerContext,String[] locations,String[] areaLocations,String locationspropertyname,String name,String controllername,String cacheKeyPrefix,Boolean useCache,String[]& searchedLocations)

这是我到目前为止的代码：

public string RenderRazorVIEw(string vIEwPath,object model)    {        var controller = GetMockedDummyController();        //Exception here        var vIEwResult =             VIEwEngines.Engines.FindVIEw(controller.ControllerContext,"Index","");        using (var sw = new StringWriter())        {            var vIEwContext =                new VIEwContext(                    controller.ControllerContext,vIEwResult.VIEw,new VIEwDataDictionary(model),new TempDataDictionary(),sw);            vIEwResult.VIEw.Render(vIEwContext,sw);            return sw.ToString();        }    }

我正在构建控制器：

private Controller GetMockedDummyController()    {        var httpContextBaseMock = new Mock<httpContextBase>();        var httpRequestMock = new Mock<httpRequestBase>();        var httpResponseMock = new Mock<httpResponseBase>();        httpContextBaseMock.SetupGet(x => x.Request).Returns(httpRequestMock.Object);        httpContextBaseMock.SetupGet(x => x.Response).Returns(httpResponseMock.Object);        var controller = new DummyController();        var routeData = new RouteData();        routeData.Values.Add("controller","Dummy");        controller.ControllerContext =             new ControllerContext(                httpContextBaseMock.Object,routeData,controller);        controller.Url =            new UrlHelper(                new RequestContext(                    httpContextBaseMock.Object,routeData),new RouteCollection());        return controller;    }

DummyController只是公共类DummyController：Controller {}

题

提供VIEw的路径,如何从Test项目将其呈现为HTML？或者更具体地说,我如何模拟出ControllerContext.displayMode？

解决方法 假设您完全分离了关注点,是否有必要实例化控制器？如果没有,那么也许您可以使用 RazorEngine来测试您的视图.

var contents = file.ReadAllText("pathToVIEw"); var result = Razor.Parse(contents,model);// assert here

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