如何模拟HttpContext.User [英] How to mock HttpContext.User

问题描述

我正在研究Asp.net MVC 5项目，并且尝试设置一个模拟程序以在控制器中返回自定义主体.我已经搜索并尝试了不同的建议方法，但是它们都不起作用.

I am working on a Asp.net MVC 5 project and I am trying to setup a mock to return a custom principal within a controller. I have search and tried different approach suggested but none of them works.

我有一个BaseController，我的所有控制器都继承自该控制器. BaseController具有一个User属性，该属性在getter中返回HttpContext.User.在项目中调用HttpContext.user时返回一个值，但在从单元测试项目中调用时返回NULL.

I have a BaseController which all my controllers inherit from. The BaseController has a User property which return HttpContext.User in the getter. The HttpContext.user returns a value when called within the project but return a null when call from a unit test project.

BaseController

public class BaseController : Controller
{
    protected virtual new CustomPrincipal User
    {
        get { return HttpContext.User as CustomPrincipal; }  ***<== Line with issue***
    }
}

自定义主体

public class CustomPrincipal : IPrincipal, ICustomPrincipal
{
    public IIdentity Identity { get; private set; }

    public string UserId { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public bool   IsStoreUser { get; set; }

    public CustomPrincipal(string username)
    {
        this.Identity = new GenericIdentity(username);
    }
}

控制器

public class DocumentsController : BaseController
    {
        public ViewResult ViewDocuments()
        {
            var userType = User.IsStoreUser ? UserType.StoreUser : UserType.Corporate;  ***<== User is null when calling from a unit test.***
        }
    }

测试用例

[Test]
public void ViewDocuments_WhenCalled_ShouldReturnViewModel()
{
    // Arrange
    var principal = new CustomPrincipal("2038786");
    principal.UserId = "2038786";
    principal.FirstName = "Test";
    principal.LastName = "User";
    principal.IsStoreUser = true;

    var _mockController = new Mock<DocumentsController>(new UnitOfWork(_context)) { CallBase = true };
        _mockController.Setup(u => u.User).Returns(principal);  ***<== Error - "Invalid setup on a non-virtual (overridable in VB) member: u => u.User"***

    // Act
    var result = _controller.ViewDocuments();
}

我正在使用nUnit和Moq创建模拟对象，但是我不确定自己做错了什么.我需要在DocumentControl中模拟User.IsStore的返回值，以在测试中创建的自定义主体对象中返回IsStore的值.

I'm using nUnit and Moq to create the mock object but I not sure what I'm doing wrong. I need to mock the return of User.IsStore in the DocumentControl to return the value of IsStore in the custom principal object i created in the test.

推荐答案

模拟http上下文

private class MockHttpContext : HttpContextBase {
    private readonly IPrincipal user;

    public MockHttpContext(IPrincipal principal) {
        this.user = principal;
    }

    public override IPrincipal User {
        get {
            return user;
        }
        set {
            base.User = value;
        }
    }
}

相应安排测试.

[Test]
public void ViewDocuments_WhenCalled_ShouldReturnViewModel() {
    // Arrange
    var principal = new CustomPrincipal("2038786");
    principal.UserId = "2038786";
    principal.FirstName = "Test";
    principal.LastName = "User";
    principal.IsStoreUser = true;

    var mockUoW = new Mock<IUnitOfWork>();
    //...setup UoW dependency if needed
    var controller = new DocumentsController(mockUoW.Object);
    controller.ControllerContext = new ControllerContext {
        Controller = controller,
        HttpContext = new MockHttpContext(principal)
    };

    // Act
    var result = controller.ViewDocuments();

    //Assert
    //...assertions
}

不要模拟正在测试的系统.模拟其依赖项.

Don't mock system under test. Mock its dependencies.

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