FileContentResult null从控制器方法

Question

I have the following method in my Controller;

        [HttpGet]
        public ActionResult Process(int id)
        {
                var file = ServiceUtilities.FileManager.GetFile(id);

                if (file != null)
                {
                    var fcr = new FileContentResult(new byte[1], @"Image\Gif");
                    return fcr;
                }

                return RedirectToAction("Index", "Error");
        }

And I am calling this code from my Unit Test as follows;

var response =
            new Controllers.FileController().Process(1) as FileStreamResult;


Assert.IsNotNull(response);

However, response is always null. If I set a breakpoint on fcr in Controller code, it is not null.

For clarification, file is a mocked object and is not null.

Answer 1

I may be missing something, but FileContentResult (what you return from your method) is NOT a FileStreamResult (what you cast it to in your test). They both inherit from FileResult , but in order for your test to pass, FileContentResult would need to inherit from FileStreamResult .

Or is that a mis-type?