模拟控制器上下文和urlhelper

Question

在单元测试中我使用

伪造http上下文

 var fakeHttpContext = new Mock<HttpContextBase>();
 var controllerContext = new Mock<ControllerContext>();
 controllerContext.Setup(t => t.HttpContext).Returns(fakeHttpContext.Object);            
 this.controller.ControllerContext = controllerContext.Object;

现在在我的代码中，我正在使用以下

UrlHelper helper = new UrlHelper(this.ControllerContext.RequestContext);                        
string url = helper.Action("Details", "Pers", new { id = person.Id });

为了使用URLHELPER代码，我应该模拟什么内部测试？目前URLHELPER辅助器为null。

P.S。由于清晰度，我没有在测试中显示控制器代码的全部初始化，但我现在正在使用此请求上下文和urlhelper挣扎。

Answer 1

Controller已经具有可以通过实例或模拟的 UrlHelper Url属性。无需在代码中进行新的。

使用使用UrlHelper的控制器来查看此示例测试。

[TestClass]
public class UrlHelperTest {
    [TestMethod]
    public void MockUrlHelper() {
        //Arrange
        var requestUrl = new Uri("http://myrequesturl");
        var request = Mock.Of<HttpRequestBase>();
        var requestMock = Mock.Get(request);
        requestMock.Setup(m => m.Url).Returns(requestUrl);
        var httpcontext = Mock.Of<HttpContextBase>();
        var httpcontextSetup = Mock.Get(httpcontext);
        httpcontextSetup.Setup(m => m.Request).Returns(request);

        var actionName = "MyTargetActionName";
        var expectedUrl = "http://myfakeactionurl.com";
        var mockUrlHelper = new Mock<UrlHelper>();
        mockUrlHelper
            .Setup(m => m.Action(actionName, "Register", It.IsAny<object>(), It.IsAny<string>()))
            .Returns(expectedUrl)
            .Verifiable();
        var sut = new MyController();
        sut.Url = mockUrlHelper.Object;
        sut.ControllerContext = new ControllerContext {
            Controller = sut,
            HttpContext = httpcontext,
        };
        //Act
        var result = sut.MyAction();
        //Assert
        mockUrlHelper.Verify();
    }
    public class MyController : Controller {
        [HttpPost]
        public ActionResult MyAction() {
            var link = GenerateActionLink("MyTargetActionName", string.Empty, string.Empty);
            return View((object)link);
        }
        private string GenerateActionLink(string actionName, string token, string username) {
            string validationLink = null;
            if (Request.Url != null) {
                var encodedToken = EncodedUrlParameter(token);
                var url = Url.Action(actionName, "Register", new { Token = encodedToken, Username = username }, Request.Url.Scheme);
                validationLink = url;
            }
            return validationLink;
        }
        private string EncodedUrlParameter(string token) {
            return "Fake encoding";
        }
    }
}