我有一个使用 System.Web.Mvc.HtmlHelper.GenerateLink 方法的 MVC 4 控制器。我想对控制器进行单元测试,因此我必须模拟这个方法。我正在使用起订量。
我的问题是调用 GenerateLink 方法时出现 NullReferenceException,我认为这是因为我的第一个参数 (RequestContext) 没有正确模拟。但我不知道我必须模拟 RequestContext 的哪些属性以及如何模拟它以摆脱这个错误。
目前我有这个作为模拟设置:
var RequestContextMock = new Mock<RequestContext>();
RequestContextMock
.Setup(x => x.HttpContext.Request.ApplicationPath)
.Returns(@"/");
RequestContextMock
.Setup(x => x.HttpContext.Response.ApplyAppPathModifier(It.IsAny<string>()))
.Returns((string s) => s);
var Routes = new RouteCollection();
Routes.MapRoute(
name: "Default",
url: "{controller}/{action}/{id}",
defaults: new {controller = "Home", action = "Index", id = UrlParameter.Optional});
但这会在执行 GenerateLink 方法时给出 NullReferenceException,所以很明显我在某处遗漏了一些值。
编辑: 被测控制器的相关部分是:
public class _AccountInfoController : Controller
{
readonly IUserRepository _UserRepository;
readonly IIdentityRepository _IdentityRepository;
public _AccountInfoController(IUserRepository userRepository,IIdentityRepository identityRepository)
{
this._UserRepository = userRepository;
this._IdentityRepository = identityRepository;
}
[AllowAnonymous]
public ActionResult Index(RequestContext requestContext, RouteCollection routes)
{
var AccountInfoModel = new AccountInfoModel();
string Email = _IdentityRepository.GetEmailAddress();
User User = _UserRepository.GetByEmail(Email);
if (User != null)
{
string Link = HtmlHelper.GenerateLink(requestContext,routes,"Logoff",null,"Index","Logoff",null,null);
单元测试是:
[TestMethod]
public void HaveTenantNameInModel()
{
const string TenantName = "tenant name.";
Tenant TestTenant = new Tenant {Name = TenantName};
User TestUser = new User {CurrentTenant = (TestTenant)};
var UserRepository = new Mock<IUserRepository>();
UserRepository
.Setup(p => p.GetByEmail(null))
.Returns(TestUser);
AccountInfoModel AccountInfoModel = new AccountInfoModel();
var IdentityRepository = new Mock<IIdentityRepository>();
var ControllerUnderTest = new _AccountInfoController(UserRepository.Object,IdentityRepository.Object);
//Mock the request context
var RequestContextMock = new Mock<RequestContext>();
RequestContextMock
.Setup(x => x.HttpContext.Request.ApplicationPath)
.Returns(@"/");
RequestContextMock
.Setup(x => x.HttpContext.Response.ApplyAppPathModifier(It.IsAny<string>()))
.Returns((string s) => s);
var Routes = new RouteCollection();
Routes.MapRoute(
name: "Default",
url: "{controller}/{action}/{id}",
defaults: new {controller = "Home", action = "Index", id = UrlParameter.Optional});
dynamic Result = ControllerUnderTest.Index(RequestContextMock.Object, Routes);
Assert.IsTrue(Result.GetType() == typeof(PartialViewResult));
Assert.AreEqual(TenantName, Result.Model.TenantName);
}