如何使用 moq 模拟 Controller.User

问题描述

我有几个 ActionMethods 像这样查询 Controller.User 的角色

I have a couple of ActionMethods that queries the Controller.User for its role like this

bool isAdmin = User.IsInRole("admin");

在这种情况下方便地采取行动.

acting conveniently on that condition.

我开始用这样的代码对这些方法进行测试

I'm starting to make tests for these methods with code like this

[TestMethod]
public void HomeController_Index_Should_Return_Non_Null_ViewPage()
{
    HomeController controller  = new HomePostController();
    ActionResult index = controller.Index();

    Assert.IsNotNull(index);
}

并且该测试失败，因为未设置 Controller.User.有什么想法吗?

and that Test Fails because Controller.User is not set. Any idea?

推荐答案

你需要Mock ControllerContext、HttpContextBase，最后是IPrincipal来模拟Controller上的用户属性.使用 Moq (v2) 应该可以使用以下几行.

You need to Mock the ControllerContext, HttpContextBase and finally IPrincipal to mock the user property on Controller. Using Moq (v2) something along the following lines should work.

    [TestMethod]
    public void HomeControllerReturnsIndexViewWhenUserIsAdmin() {
        var homeController = new HomeController();

        var userMock = new Mock<IPrincipal>();
        userMock.Expect(p => p.IsInRole("admin")).Returns(true);

        var contextMock = new Mock<HttpContextBase>();
        contextMock.ExpectGet(ctx => ctx.User)
                   .Returns(userMock.Object);

        var controllerContextMock = new Mock<ControllerContext>();
        controllerContextMock.ExpectGet(con => con.HttpContext)
                             .Returns(contextMock.Object);

        homeController.ControllerContext = controllerContextMock.Object;
        var result = homeController.Index();
        userMock.Verify(p => p.IsInRole("admin"));
        Assert.AreEqual(((ViewResult)result).ViewName, "Index");
    }

测试用户不是管理员时的行为就像将 userMock 对象上设置的期望更改为返回 false 一样简单.

Testing the behaviour when the user isn't an admin is as simple as changing the expectation set on the userMock object to return false.

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