private IHtmlHelper<TestModel> MockHtmlHelper()
{
IOptions<MvcViewOptions> options = Substitute.For<IOptions<MvcViewOptions>>();
IModelMetadataProvider provider = new EmptyModelMetadataProvider();
options.Value.Returns(new MvcViewOptions());
IHtmlGenerator generator = new DefaultHtmlGenerator(
Substitute.For<IAntiforgery>(),
options,
provider,
Substitute.For<IUrlHelperFactory>(),
HtmlEncoder.Default,
new ClientValidatorCache());
HtmlHelper<TestModel> htmlHelper = new HtmlHelper<TestModel>(
generator,
Substitute.For<ICompositeViewEngine>(),
provider,
Substitute.For<IViewBufferScope>(),
HtmlEncoder.Default,
UrlEncoder.Default,
new ExpressionTextCache());
TestModel model = new TestModel();
model.ParentId = "Model's parent ID";
ViewContext context = new ViewContext();
context.ViewData = new ViewDataDictionary<TestModel>(context.ViewData, model);
htmlHelper.Contextualize(context);
return htmlHelper;
}