我正在为 RC1 中的控制器编写一些单元测试。这是我正在测试的控制器的公共签名:
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult AcceptColleague()
{
AcceptColleague 内部的实现使用 TryUpdateModel(colleague) 方法从表单字段中填充 Colleague 对象。但是,在尝试对该方法进行单元测试时,我在 TryUpdateModel 行上遇到了“对象引用未设置为对象的实例”错误。
这是我的单元测试代码:
// definition
HomeController controller = new HomeController();
IColleagueRepository fakeColleagueRepo = MockRepository.GenerateMock<IColleagueRepository>();
Colleague requestedColleauge = new Colleague();
EmployeeInfo currentUser = new EmployeeInfo();
HttpContextBase fakeHttpContext = MockRepository.GenerateMock<HttpContextBase>();
HttpRequestBase fakeHttpRequest = MockRepository.GenerateMock<HttpRequestBase>();
ControllerContext fakeContext = MockRepository.GenerateMock<ControllerContext>(fakeHttpContext, new RouteData(), controller);
NameValueCollection fakeForm = new NameValueCollection();
// expectations
fakeColleagueRepo.Expect(c => c.Read(1234)).Return(requestedColleauge);
fakeColleagueRepo.Expect(c => c.Update(requestedColleauge));
fakeColleagueRepo.Expect(c => c.Add(new Colleague())).IgnoreArguments().Constraints(Is.NotNull());
fakeContext.Expect(cx => cx.HttpContext).Return(fakeHttpContext);
fakeHttpContext.Expect(hcx => hcx.Request).Return(fakeHttpRequest);
fakeHttpRequest.Expect(hr => hr.Form).Return(fakeForm);
// setup
controller.ColleagueRepository = fakeColleagueRepo;
controller.ControllerContext = fakeContext;
requestedColleauge.TargetEmployeeInfoId = 123456;
requestedColleauge.GeneratedEmployeeInfoId = 654321;
currentUser.EmployeeInfoId = 123456;
fakeForm.Add("ColleagueId", "22222");
// action
RedirectToRouteResult result = controller.AcceptColleague() as RedirectToRouteResult;
// validation
Assert.IsNotNull(result, "AcceptColleague() did not return RedirectToRouteResult");
我是否在模拟中遗漏了某些内容,还是应该使用不同的公共签名,例如 AcceptColleague(Colleague colleague),然后测试 ModelState.IsValid 属性?
如果是这样,怎么看不到我可以模拟控制器的只读 ModelState 属性的方法?