How to mock Request.Files[] in MVC unit test class?
I want to test a controller method in MVC unit test. For my controller method to test, I require a Request.Files[] collection with length one. I want to mock Request.Files[] as I have used a file upload control on my view rendered by controller method. Can anyone please suggest how can I moc开发者_如何学Gok request.file collection in my unit test.
thanks, kapil
You didn't mention what mocking framework you are using but here's how you would do it with Rhino Mocks:
Controller:
public class HomeController : Controller
{
public ActionResult Index()
{
return View(Request.Files.Count);
}
}
Unit test:
[TestMethod]
public void SomeTest()
{
// arrange
var controller = new HomeController();
var context = MockRepository.GenerateStub<HttpContextBase>();
var request = MockRepository.GenerateStub<HttpRequestBase>();
var files = MockRepository.GenerateStub<HttpFileCollectionBase>();
context.Stub(x => x.Request).Return(request);
files.Stub(x => x.Count).Return(5);
request.Stub(x => x.Files).Return(files);
controller.ControllerContext = new ControllerContext(context, new RouteData(), controller);
// act
var actual = controller.Index();
// assert
Assert.IsInstanceOfType(actual, typeof(ViewResult));
var viewResult = actual as ViewResult;
Assert.IsInstanceOfType(viewResult.ViewData.Model, typeof(int));
Assert.AreEqual(5, viewResult.ViewData.Model);
}
Remark: Using MVCContrib.TestHelper this test could be greatly simplified especially the context mocking part and the asserts as well:
[TestMethod]
public void SomeTest()
{
// arrange
var sut = new HomeController();
InitializeController(sut);
Files["test.txt"] = MockRepository.GenerateStub<HttpPostedFileBase>();
// act
var actual = sut.Index();
// assert
actual
.AssertViewRendered()
.WithViewData<int>()
.ShouldBe(1);
}
Scott Hanselman has a blog post covering this using Moq.
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