private static HtmlHelper <TModel> GetHtmlHelper <TModel>(
ViewDataDictionary <TModel> viewData,
IUrlHelper urlHelper,
ICompositeViewEngine viewEngine,
IModelMetadataProvider provider,
IStringLocalizerFactory localizerFactory,
Func <IHtmlHelper, IHtmlHelper> innerHelperWrapper,
IHtmlGenerator htmlGenerator,
string idAttributeDotReplacement)
{
var httpContext = new DefaultHttpContext();
var actionContext = new ActionContext(httpContext, new RouteData(), new ActionDescriptor());
var options = new MvcViewOptions();
if (!string.IsNullOrEmpty(idAttributeDotReplacement))
{
options.HtmlHelperOptions.IdAttributeDotReplacement = idAttributeDotReplacement;
}
var localizationOptions = new MvcDataAnnotationsLocalizationOptions();
var localizationOptionsAccesor = Options.Create(localizationOptions);
options.ClientModelValidatorProviders.Add(new DataAnnotationsClientModelValidatorProvider(
new ValidationAttributeAdapterProvider(),
localizationOptionsAccesor,
localizerFactory));
var urlHelperFactory = new Mock <IUrlHelperFactory>();
urlHelperFactory
.Setup(f => f.GetUrlHelper(It.IsAny <ActionContext>()))
.Returns(urlHelper);
var expressionTextCache = new ExpressionTextCache();
if (htmlGenerator == null)
{
htmlGenerator = HtmlGeneratorUtilities.GetHtmlGenerator(provider, urlHelperFactory.Object, options);
}
// TemplateRenderer will Contextualize this transient service.
var innerHelper = (IHtmlHelper) new HtmlHelper(
htmlGenerator,
viewEngine,
provider,
new TestViewBufferScope(),
new HtmlTestEncoder(),
UrlEncoder.Default);
if (innerHelperWrapper != null)
{
innerHelper = innerHelperWrapper(innerHelper);
}
var serviceProvider = new ServiceCollection()
.AddSingleton(viewEngine)
.AddSingleton(urlHelperFactory.Object)
.AddSingleton(Mock.Of <IViewComponentHelper>())
.AddSingleton(innerHelper)
.AddSingleton <IViewBufferScope, TestViewBufferScope>()
.BuildServiceProvider();
httpContext.RequestServices = serviceProvider;
var htmlHelper = new HtmlHelper <TModel>(
htmlGenerator,
viewEngine,
provider,
new TestViewBufferScope(),
new HtmlTestEncoder(),
UrlEncoder.Default,
expressionTextCache);
var viewContext = new ViewContext(
actionContext,
Mock.Of <IView>(),
viewData,
new TempDataDictionary(
httpContext,
Mock.Of <ITempDataProvider>()),
new StringWriter(),
options.HtmlHelperOptions);
htmlHelper.Contextualize(viewContext);
return(htmlHelper);
}