我有一个Mock挑战 – 我正在使用MVC 3和nunit框架并试图模拟一个控制器有一个HttpPostedFileBase作为参数.控制器签名如下所示: public ActionResult UploadAttachment(AttachmentViewModel clientAttachment, Htt
public ActionResult UploadAttachment(AttachmentViewModel clientAttachment, HttpPostedFileBase file, string clientName)
我为我的“文件”参数设置了一个模拟参考,但它抱怨它不会采用模拟对象.我猜我需要为这个场景设置一个ControllerContext,但我也没有任何运气.对于第一个测试,我只需要HttpPostedFileBase返回一个空文件(在空白文件引用进入的情况下).我还阅读了Scott Hanselman关于这个主题的优秀文章(computer Zen).对于我关注的MVC部分中的关键句似乎是“当你创建自己的ControllerContext时,你将在Web服务器外部运行时(例如在测试中)获得动态生成的HttpRequestBase的Mock.”这似乎是我遇到墙壁的地方.
我知道我需要这些元素:
controller.ControllerContext = new ControllerContext(mockContext.Object, new RouteData(), controller); mockContext.SetupGet(c => c.Request).Returns(mockRequest.Object); mockRequest.Setup(c => c.HttpMethod).Returns([not sure what to evoke here]);
我处于被困状态.感谢您提出正确方向的建议或推动.
假设您使用实际视图模型(由控制器操作使用,而不是使用大量参数):public class MyViewModel { public HttpPostedFileBase File { get; set; } // those won't be used in my example but you get the point public string ClientName { get; set; } public AttachmentViewModel ClientAttachment { get; set; } }
和一个控制器,其中包含您尝试进行单元测试的操作:
public class HomeController : Controller { [HttpPost] public ActionResult UploadAttachment(MyViewModel model) { if (!ModelState.IsValid) { return View(model); } var file = Path.Combine(Server.MapPath("~/App_Data"), model.File.FileName); model.File.SaveAs(file); return RedirectToAction("succes"); } }
你现在有2个案例要涵盖:
>无效的modelstate =>返回一个视图
>有效的modelstate =>文件已保存,我们重定向.
让我们滚动:
[TestMethod] public void UploadAttachment_Should_Return_View_If_ModelState_Is_Not_Valid() { // arrange var sut = new HomeController(); var model = new MyViewModel(); sut.ModelState.AddModelError("file", "please select a file"); // act var actual = sut.UploadAttachment(model); // assert Assert.IsInstanceOfType(actual, typeof(ViewResult)); }
当然还有第二种情况:
[TestMethod] public void UploadAttachment_Should_Save_File_If_Model_Is_Valid_And_Redirect() { // arrange var sut = new HomeController(); var file = new Mock<HttpPostedFileBase>(); file.Setup(x => x.FileName).Returns("foo.txt"); var model = new MyViewModel { File = file.Object }; var server = new Mock<HttpServerUtilityBase>(); server.Setup(x => x.MapPath("~/App_Data")).Returns(@"c:\wwwroot\App_Data"); var httpContext = new Mock<HttpContextBase>(); httpContext.Setup(x => x.Server).Returns(server.Object); sut.ControllerContext = new ControllerContext(httpContext.Object, new RouteData(), sut); // act var actual = sut.UploadAttachment(model); // assert Assert.IsInstanceOfType(actual, typeof(RedirectToRouteResult)); file.Verify(x => x.SaveAs(@"c:\wwwroot\App_Data\foo.txt")); }
希望这会让你走上正轨.对不起,它使用MSTest而不是NUnit,但端口应该不仅仅是微不足道的(不应该超过30个工作秒).用[Test]替换[TestMethod],你不应该远离目标.是的,我打赌2¢这个Assert.IsInstanceOfType在NUnit中有一个等价物.