asp.net-mvc - 在 Controller 上使用依赖注入(inject)进行单元测试

Question

我厌倦了需要填写字段然后登录注销来做一个简单的测试。

我搜索了 xUnit 和 NUnit，但发现了几个教程。我想测试我对 AccountController (asp.net core 2 mvc) 的修改，我使用存储库将逻辑放入此存储库。

问题是如何安排所有这些依赖注入(inject)的测试。

Controller 示例。

namespace Inside.Controllers
{
[Authorize]
[Route("[controller]/[action]")]
public class AccountController : Controller
{
    private readonly UserManager<ApplicationUser> _userManager;
    private readonly SignInManager<ApplicationUser> _signInManager;
    private readonly IEmailSender _emailSender;
    private readonly ILogger _logger;
    private readonly IUsersRepository _users;

    public AccountController(
            UserManager<ApplicationUser> userManager,
            SignInManager<ApplicationUser> signInManager,
            IEmailSender emailSender,
            ILogger<AccountController> logger,
            IUsersRepository users
        )
    {
        _userManager = userManager;
        _signInManager = signInManager;
        _emailSender = emailSender;
        _logger = logger;
        _users = users;
    }

    [HttpGet]
    [AllowAnonymous]
    public IActionResult RegisterFirstUser(string returnUrl = null)
    {
        if (!_users.HasUsersInDB())
        {
            return RedirectToAction(nameof(SetupWebApp));
        }
        if (!_users.HasOnlySystemUser())
        {
            return RedirectToAction(nameof(Login)); ;
        }
        ViewData["ReturnUrl"] = returnUrl;
        return View();
    }
}

现在我不知道如何进行测试来测试这个 Controller ，因为有很多依赖注入(inject)。特别是这两个 UserManager userManager，SignInManager signInManager

抱歉新手问题。 :p

Answer 1

您可以使用 Moq很容易做到这一点。假设您的 Controller 具有此签名:

public class UsersController : Controller
{
    private IUserRepository _userRepository;
    private ApplicationUserManager _userManager;
    private ApplicationSignInManager _signInManager;

    public UsersController(ApplicationUserManager userManager, ApplicationSignInManager signInManager, IUserRepository userRepository)
    {
        UserManager = userManager;
        SignInManager = signInManager;
        _userRepository = userRepository;
    }

 ...
} 

然后对此的测试将看起来像这样(使用 Moq)

 [TestClass]
public class UsersControllerTests
{
    private Mock<IUserRepository> _userRepository;
    private Mock<ApplicationUserManager> _userManager;
    private Mock<ApplicationSignInManager> _signInManager;
    private UsersController _controller;
    private Mock<IUserStore<ApplicationUser>> _userStore;
    private Mock<IAuthenticationManager> _authManager;

    [TestInitialize]
    public void SetUp()
    {
        _userRepository = new Mock<IUserRepository>();

        _userStore = new Mock<IUserStore<ApplicationUser>>();
        _authManager = new Mock<IAuthenticationManager>();
        _userManager = new Mock<ApplicationUserManager>(_userStore.Object);
        _signInManager = new Mock<ApplicationSignInManager>(_userManager.Object, _authManager.Object);

        _controller = new UsersController(_userManager.Object, _signInManager.Object, _userRepository.Object);

        //only do this if you want to use request object in your tests
        var returnUrl = new Uri("http://www.example.com");
        var httpContext = new Mock<HttpContextBase>();
        var request = new Mock<HttpRequestBase>();
        httpContext.Setup(x => x.Request).Returns(request.Object);
        request.Setup(x => x.Url).Returns(new Uri("http://localhost:123"));
        var requestContext = new RequestContext(httpContext.Object, new RouteData());
        _controller.Url = new UrlHelper(requestContext);
    }