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POLooking for direction on unit testing a controller extension that renders a partial view
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  1. POLooking for direction on unit testing a controller extension that renders a partial view
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    copied!<p>As the title says, I'm looking for direction on how to properly test a controller extension. The extension renders a partial view which in turn I'm using within a JSONResult:</p> <pre><code> public static string RenderPartialViewToString(this Controller controller, string viewName = null, object model = null) { if (string.IsNullOrEmpty(viewName)) { viewName = controller.ControllerContext.RouteData.GetRequiredString("action"); } controller.ViewData.Model = model; using (StringWriter sw = new StringWriter()) { ViewEngineResult viewResult = ViewEngines.Engines.FindPartialView(controller.ControllerContext, viewName); ViewContext viewContext = new ViewContext(controller.ControllerContext, viewResult.View, controller.ViewData, controller.TempData, sw); viewResult.View.Render(viewContext, sw); return sw.GetStringBuilder().ToString(); } } </code></pre> <p>Example usage:</p> <pre><code>public JsonResult Foo() { var model = _repository.getSomeData(); return Json(new { html = this.RenderPartialViewToString("Index", model) }, JsonRequestBehavior.AllowGet); } </code></pre> <p>I'm using NUnit &amp; the <a href="http://mvccontrib.codeplex.com/wikipage?title=TestHelper" rel="noreferrer">MvcContrib test helper</a>, however when setting up a controller that makes use of this extension I'm running into a NRE. I'm assuming that the controller context is not setup correctly?</p> <p>Ultimately the test is barfing on <code>ViewEngines.Engines.FindPartialView</code>. Here is a portion of the failing test:</p> <pre><code>var routeData = new RouteData(); routeData.Values.Add("controller", "someName"); routeData.Values.Add("action", "someAction"); var builder = new TestControllerBuilder(); var controller = new ListingController(repository.Object); builder.RouteData = routeData; builder.InitializeController(controller); var result = controller.Foo(); </code></pre>
 

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