Phương pháp thử nghiệm đơn vị chuyển đổi chế độ xem MVC thành chuỗi bằng cách sử dụng phương thức view.render

Question

Tôi đã viết phương thức chuyển đổi chế độ xem MVC thành chuỗi và phương thức kiểm tra để kiểm tra xem chuỗi có trả về chuỗi hay không.

Tất nhiên nó hoạt động với Web nhưng khi tôi chạy thử nghiệm trong NUnit nó ném một NullReferenceException trong System.Web khi phương pháp cố gắng gọi View.Render.

Đây là StackTrace:

w System.Web.VirtualPath.GetCacheKey() 
    w System.Web.Compilation.BuildManager.GetCacheKeyFromVirtualPath(VirtualPath virtualPath, Boolean& keyFromVPP) 
    w System.Web.Compilation.BuildManager.GetVPathBuildResultFromCacheInternal(VirtualPath virtualPath, Boolean ensureIsUpToDate) 
    w System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate) 
    w System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate) 
    w System.Web.Compilation.BuildManager.GetVirtualPathObjectFactory(VirtualPath virtualPath, HttpContext context, Boolean allowCrossApp, Boolean throwIfNotFound) 
    w System.Web.Compilation.BuildManager.GetObjectFactory(String virtualPath, Boolean throwIfNotFound) 
    w System.Web.Mvc.BuildManagerWrapper.System.Web.Mvc.IBuildManager.FileExists(String virtualPath) 
    w System.Web.Mvc.BuildManagerViewEngine.FileExists(ControllerContext controllerContext, String virtualPath) 
    w System.Web.Mvc.VirtualPathProviderViewEngine.GetPathFromSpecificName(ControllerContext controllerContext, String name, String cacheKey, String[]& searchedLocations) 
    w System.Web.Mvc.VirtualPathProviderViewEngine.GetPath(ControllerContext controllerContext, String[] locations, String[] areaLocations, String locationsPropertyName, String name, String controllerName, String cacheKeyPrefix, Boolean useCache, String[]& searchedLocations) 
    w System.Web.Mvc.VirtualPathProviderViewEngine.FindView(ControllerContext controllerContext, String viewName, String masterName, Boolean useCache) 
    w System.Web.Mvc.ViewEngineCollection.<>c__DisplayClassc.<FindView>b__b(IViewEngine e) 
    w System.Web.Mvc.ViewEngineCollection.Find(Func`2 lookup, Boolean trackSearchedPaths) 
    w System.Web.Mvc.ViewEngineCollection.Find(Func`2 cacheLocator, Func`2 locator) 
    w System.Web.Mvc.ViewEngineCollection.FindView(ControllerContext controllerContext, String viewName, String masterName) 
    w MvcApplication.Infrastructure.Services.MailingService.RenderEmailBody[T](String viewPath, T model, ControllerContext controllerContext, Boolean isParialView) w d:\MyProjects\CertyfikatyNoble\branches\Certyfikaty3\MvcApplication\Infrastructure\Services\MailingService.cs:wiersz 175 
    w MvcApplication.Tests.MailingServiceTests.ViewToStrngTest() w d:\MyProjects\CertyfikatyNoble\branches\Certyfikaty3\MvcApplication.Tests\MailingServiceTests.cs:wiersz 144 

Rendering phương pháp mã: Phương pháp

public string RenderEmailBody<T>(string viewPath, T model, ControllerContext controllerContext, bool isParialView) 
{ 
    ViewEngineResult viewEngineResult = null; 
    if (isParialView == true) 
    { 
     viewEngineResult = ViewEngines.Engines.FindPartialView(controllerContext, viewPath); 
    } 
    else 
    { 
     viewEngineResult = ViewEngines.Engines.FindView(controllerContext, viewPath, null); 
    } 

    if (viewEngineResult == null) 
    { 
     throw new FileNotFoundException("Coukld not find view."); 
    } 

    var view = viewEngineResult.View; 
    controllerContext.Controller.ViewData.Model = model; 

    string result = null; 

    using (var sw = new StringWriter()) 
    { 
     var ctx = new ViewContext(controllerContext, view, 
            controllerContext.Controller.ViewData, 
            controllerContext.Controller.TempData, 
            sw); 
     view.Render(ctx, sw); 
     result = sw.ToString(); 
    } 

    return result; 
} 

Và thử nghiệm với bối cảnh điều khiển giả:

 Mock<HttpBrowserCapabilitiesBase> browserMock = new Mock<HttpBrowserCapabilitiesBase>(); 
     browserMock.Setup(m => m.IsMobileDevice).Returns(false); 

     Mock<HttpServerUtilityBase> httpServerUtilityBaseMock = new Mock<HttpServerUtilityBase>(MockBehavior.Strict); 

     Mock<HttpResponseBase> httpResponseMock = new Mock<HttpResponseBase>(MockBehavior.Strict); 
     httpResponseMock.Setup(m => m.Cookies).Returns(new HttpCookieCollection() { new HttpCookie("ResponseCookieTest") }); 

     Mock<HttpRequestBase> httpRequestMock = new Mock<HttpRequestBase>(MockBehavior.Strict); 
     httpRequestMock.Setup(m => m.UserHostAddress).Returns("127.0.0.1"); 
     httpRequestMock.Setup(m => m.Cookies).Returns(new HttpCookieCollection() { new HttpCookie("RequestCookieTest") }); 
     httpRequestMock.Setup(m => m.UserAgent).Returns("None"); 
     httpRequestMock.Setup(m => m.Browser).Returns(browserMock.Object); 
     httpRequestMock.Setup(m => m.ApplicationPath).Returns("/"); 
     httpRequestMock.Setup(m => m.AppRelativeCurrentExecutionFilePath).Returns("/"); 
     httpRequestMock.Setup(m => m.PathInfo).Returns(string.Empty); 
     httpRequestMock.Setup(m => m.Form).Returns(new NameValueCollection()); 
     httpRequestMock.Setup(m => m.QueryString).Returns(new NameValueCollection()); 

     Mock<HttpSessionStateBase> httpSessionStateMock = new Mock<HttpSessionStateBase>(MockBehavior.Strict); 
     httpSessionStateMock.Setup(m => m.SessionID).Returns(Guid.NewGuid().ToString()); 


     Mock<HttpContextBase> HttpContextMock = new Mock<HttpContextBase>(MockBehavior.Strict); 
     HttpContextMock.Setup(m => m.Request).Returns(httpRequestMock.Object); 
     HttpContextMock.Setup(m => m.Response).Returns(httpResponseMock.Object); 
     HttpContextMock.Setup(m => m.Server).Returns(httpServerUtilityBaseMock.Object); 
     HttpContextMock.Setup(m => m.Session).Returns(httpSessionStateMock.Object); 

     HttpContextMock.Setup(m => m.Items).Returns(new ListDictionary()); 

     RouteData routeData = new RouteData(); 
     routeData.Values.Add("controller", "someController"); 
     routeData.Values.Add("action", "index"); 

     Mock<ControllerContext> controllerContextMock = new Mock<ControllerContext>(MockBehavior.Strict); 
     controllerContextMock.Setup(m => m.HttpContext).Returns(HttpContextMock.Object); 
     controllerContextMock.Setup(m => m.RouteData).Returns(routeData); 
     controllerContextMock.Setup(m => m.Controller).Returns(new AccountController()); 

     SiteConfigurationService siteConfigurationService = SiteConfigurationService.Instance(); 
     siteConfigurationService.LoadConfig<SiteConfigurations>(this._siteConfigurationsRepository.GetDefaultConfig()); 

     MailingService service = new MailingService(controllerContextMock.Object, siteConfigurationService); 

     string result = service.RenderEmailBody<object>("/ViewToRenderToString.cshtml", new object(), controllerContextMock.Object, false); 

tôi đọc HERE rằng nguyên nhân là _virtualPath và HttpRuntime.AppDomainAppVirtualPathString int System.Web.VirtualP athString là NULL.

Vì vậy, có thể đặt chúng để thử nghiệm đơn vị?

Xin cảm ơn trước,

Answer 1

Bạn đã thử triển khai VirtualPathProvider của riêng mình chưa?

Something như thế này:

public class CustomVirtualPathProvider : VirtualPathProvider 
    { 
     internal class CustomVirtualFile : ViewVirtualFile 
     { 
      public override bool IsDirectory 
      { 
       get 
       { 
        return base.IsDirectory; 
       } 
      } 
      public override string Name 
      { 
       get 
       { 
        return base.Name; 
       } 
      } 
      public override string ResourceKey 
      { 
       get 
       { 
        return base.ResourceKey; 
       } 
      } 
      public override System.IO.Stream Open() 
      { 
       return base.Open(); 
      } 
      public CustomVirtualFile(string path) 
       : base(path) 
      { 

      } 

     } 
     public override bool FileExists(string virtualPath) 
     { 
      return base.FileExists(virtualPath); 
     } 
     public override VirtualFile GetFile(string virtualPath) 
     { 
      return base.GetFile(virtualPath); 
     } 
     public override VirtualDirectory GetDirectory(string virtualDir) 
     { 
      return base.GetDirectory(virtualDir); 
     } 
     public override bool DirectoryExists(string virtualDir) 
     { 
      return base.DirectoryExists(virtualDir); 
     } 


    } 

Sau đó, trong Global.asax

///register our custom virtual path provider factory. 
      HostingEnvironment.RegisterVirtualPathProvider(new CustomVirtualPathProvider()); 

Với phương pháp này, bạn có thể làm cho quan điểm từ bất cứ nơi nào.