Comment puis-je tester l'unité de la méthode d'action de l'API Web lorsqu'elle renvoie IHttpActionResult?

Supposons que c'est ma méthode d'action

public IHttpActionResult Get(int id)
{
    var status = GetSomething(id);
    if (status)
    {
        return Ok();
    }
    else
    {
        return NotFound();
    }
}

Le test sera

var httpActionResult = controller.Get(1);

Comment puis-je vérifier mon code d'état http après cela?

Voici Ok()juste une aide pour le type OkResultqui définit l'état de la réponse sur HttpStatusCode.Ok... donc vous pouvez simplement vérifier si l'instance du résultat de votre action est un OkResult... quelques exemples (écrits XUnit):

// if your action returns: NotFound()
IHttpActionResult actionResult = valuesController.Get(10);
Assert.IsType<NotFoundResult>(actionResult);

// if your action returns: Ok()
actionResult = valuesController.Get(11);
Assert.IsType<OkResult>(actionResult);

// if your action was returning data in the body like: Ok<string>("data: 12")
actionResult = valuesController.Get(12);
OkNegotiatedContentResult<string> conNegResult = Assert.IsType<OkNegotiatedContentResult<string>>(actionResult);
Assert.Equal("data: 12", conNegResult.Content);

// if your action was returning data in the body like: Content<string>(HttpStatusCode.Accepted, "some updated data");
actionResult = valuesController.Get(13);
NegotiatedContentResult<string> negResult = Assert.IsType<NegotiatedContentResult<string>>(actionResult);
Assert.Equal(HttpStatusCode.Accepted, negResult.StatusCode);
Assert.Equal("some updated data", negResult.Content);

Il est temps de ressusciter une question morte

Les réponses actuelles reposent toutes sur la conversion de l'objet de réponse en un type connu. Malheureusement, les réponses ne semblent pas avoir de hiérarchie utilisable ou de chemin de conversion implicite pour que cela fonctionne sans une connaissance approfondie de l'implémentation du contrôleur. Considérer ce qui suit:

public class MixedCodeStandardController : ApiController {

    public readonly object _data = new Object();

    public IHttpActionResult Get() {
        return Ok(_data);
    }

    public IHttpActionResult Get(int id) {
        return Content(HttpStatusCode.Success, _data);
    }
}

Tester la classe:

var testController = new MixedCodeStandardController();

var getResult = testController.Get();
var posRes = getResult as OkNegotiatedContentResult<object>;
Assert.IsType<OkNegotiatedContentResult<object>>(getResult);
Assert.AreEqual(HttpStatusCode.Success, posRes.StatusCode);
Assert.AreEqual(testController._data, posRes.Content);

var idResult = testController.Get(1);
var oddRes = getResult as OkNegotiatedContentResult<object>; // oddRes is null
Assert.IsType<OkNegotiatedContentResult<object>>(idResult); // throws failed assertion
Assert.AreEqual(HttpStatusCode.Success, oddRes.StatusCode); // throws for null ref
Assert.AreEqual(testController._data, oddRes.Content); // throws for null ref

De l'extérieur de la boîte noire, le flux de réponse est essentiellement le même. Le test doit savoir comment le contrôleur a implémenté l'appel de retour pour le tester de cette manière.

Au lieu de cela, utilisez l'objet HttpResponseMessage de IHttpActionResult renvoyé. Cela garantit que le test peut être cohérent, même lorsque le code du contrôleur peut ne pas être:

var testController = new MixedCodeStandardController();

var getResult = testController.Get();
var getResponse = getResult.ExecuteAsync(CancellationToken.None).Result;
Assert.IsTrue(getResponse.IsSuccessStatusCode);
Assert.AreEqual(HttpStatusCode.Success, getResponse.StatusCode);

var idResult = testController.Get(1);
var idResponse = idResult.ExecuteAsync(CancellationToken.None).Result;
Assert.IsTrue(idResponse.IsSuccessStatusCode);
Assert.AreEqual(HttpStatusCode.Success, idResponse.StatusCode);

C'est la réponse acceptée par Kiran Challa, adaptée pour NUnit;

var valuesController = controller;
// if your action returns: NotFound()
IHttpActionResult actionResult = valuesController.Get(10);
var notFoundRes = actionResult as NotFoundResult;
Assert.IsNotNull(notFoundRes);

// if your action returns: Ok()
actionResult = valuesController.Get(11);
var posRes = actionResult as OkResult;
Assert.IsNotNull(posRes);

// if your action was returning data in the body like: Ok<string>("data: 12")
actionResult = valuesController.Get(12);
var conNegResult = actionResult as OkNegotiatedContentResult<string>;
Assert.IsNotNull(conNegResult);
Assert.AreEqual("data: 12", conNegResult.Content);

// if your action was returning data in the body like: Content<string>(HttpStatusCode.Accepted, "some updated data");
actionResult = valuesController.Get(13);
var negResult = actionResult as NegotiatedContentResult<string>;
Assert.IsNotNull(negResult);
Assert.AreEqual(HttpStatusCode.Accepted, negResult.StatusCode);
Assert.AreEqual("some updated data", negResult.Content);

https://docs.microsoft.com/en-us/aspnet/web-api/overview/testing-and-debugging/unit-testing-controllers-in-web-api#testing-actions-that-return-ihttpactionresult

Assert.IsInstanceOfType (httpActionResult, typeof (OkResult));

Si IHttpActionResult contient un objet JSON, par exemple {"token": "A"}, nous pouvons utiliser le code suivant.

        var result = usercontroller.GetLogin("user", "password");
        Assert.IsInstanceOfType(result, typeof(OkNegotiatedContentResult<Dictionary<string,string>>));
        var content = result as OkNegotiatedContentResult<Dictionary<string, string> >;
        Assert.AreEqual("A", content.Content["token"]);

Après quelques heures de recherche et d'essais, j'ai finalement compris comment tester complètement mes méthodes Web API 2 qui retournent IHttpActionResultet utilisent le middleware OWIN et l'implémentation par défaut d'ASP.NET Identity.

Je testerai la Get()méthode sur les points suivants ApiController:

public class AccountController : ApiController
{
    private ApplicationUserManager _userManager;
    public ApplicationUserManager UserManager => _userManager ?? HttpContext.Current.GetOwinContext().GetUserManager<ApplicationUserManager>();

    [Route("api/account"), HttpGet]
    public async Task<IHttpActionResult> Get()
    {
        var user = await UserManager.FindByIdAsync(User.Identity.GetUserId());
        if (user == null)
        {
            ModelState.AddModelError(ModelStateConstants.Errors, "Account not found! Try logging out and in again.");
            return BadRequest(ModelState);
        }

        var roles = await UserManager.GetRolesAsync(user.Id);

        var accountModel = new AccountViewModel
        {
            FullName = user.FullName,
            Email = user.Email,
            Phone = user.PhoneNumber,
            Organization = user.Organization.Name,
            Role = string.Join(", ", roles)
        };

        return Ok(accountModel);
    }

    protected override void Dispose(bool disposing)
    {
        if (disposing)
        {
            if (_userManager != null)
            {
                _userManager.Dispose();
                _userManager = null;
            }
        }

        base.Dispose(disposing);
    }
}

Commencez par une classe de base dont toutes les classes de test hériteront:

public class BaseTest
{
    protected static User CurrentUser;
    protected static IList<string> Roles;

    public BaseTest()
    {
        var email = "unit@test.com";

        CurrentUser = new User
        {
            FullName = "Unit Tester",
            Email = email,
            UserName = email,
            PhoneNumber = "123456",
            Organization = new Organization
            {
                Name = "Test Organization"
            }
        };

        Roles = new List<string>
        {
            "Administrator"
        };
    }

    protected void InitializeApiController(ApiController apiController)
    {
        //Init fake controller Http and Identity data
        var config = new HttpConfiguration();
        var request = new HttpRequestMessage();
        var routeData = new HttpRouteData(new HttpRoute(""));
        apiController.ControllerContext = new HttpControllerContext(config, routeData, request)
        {
            Configuration = config
        };

        apiController.User = new GenericPrincipal(new GenericIdentity(""), new[] { "" });

        //Initialize Mocks
        var appUserMgrMock = GetMockedApplicationUserManager();
        var appSignInMgr = GetMockedApplicationSignInManager(appUserMgrMock);
        var appDbContext = GetMockedApplicationDbContext();

        //Configure HttpContext.Current.GetOwinContext to return mocks
        var owin = new OwinContext();
        owin.Set(appUserMgrMock.Object);
        owin.Set(appSignInMgr.Object);
        owin.Set(appDbContext.Object);

        HttpContext.Current = new HttpContext(new HttpRequest(null, "http://test.com", null), new HttpResponse(null));
        HttpContext.Current.Items["owin.Environment"] = owin.Environment;
    }

    private static Mock<ApplicationSignInManager> GetMockedApplicationSignInManager(Mock<ApplicationUserManager> appUserMgrMock)
    {
        var authMgr = new Mock<Microsoft.Owin.Security.IAuthenticationManager>();
        var appSignInMgr = new Mock<ApplicationSignInManager>(appUserMgrMock.Object, authMgr.Object);

        return appSignInMgr;
    }

    private Mock<ApplicationUserManager> GetMockedApplicationUserManager()
    {
        var userStore = new Mock<IUserStore<User>>();
        var appUserMgr = new Mock<ApplicationUserManager>(userStore.Object);
        appUserMgr.Setup(aum => aum.FindByIdAsync(It.IsAny<string>())).ReturnsAsync(CurrentUser);
        appUserMgr.Setup(aum => aum.GetRolesAsync(It.IsAny<string>())).ReturnsAsync(Roles);

        return appUserMgr;
    }

    private static Mock<ApplicationDbContext> GetMockedApplicationDbContext()
    {
        var dbContext = new Mock<ApplicationDbContext>();
        dbContext.Setup(dbc => dbc.Users).Returns(MockedUsersDbSet);

        return dbContext;
    }

    private static IDbSet<User> MockedUsersDbSet()
    {
        var users = new List<User>
        {
            CurrentUser,
            new User
            {
                FullName = "Testguy #1",
                Email = "test@guy1.com",
                UserName = "test@guy1.com",
                PhoneNumber = "123456",
                Organization = new Organization
                {
                    Name = "Test Organization"
                }
            }
        }.AsQueryable();

        var usersMock = new Mock<DbSet<User>>();
        usersMock.As<IQueryable<User>>().Setup(m => m.Provider).Returns(users.Provider);
        usersMock.As<IQueryable<User>>().Setup(m => m.Expression).Returns(users.Expression);
        usersMock.As<IQueryable<User>>().Setup(m => m.ElementType).Returns(users.ElementType);
        usersMock.As<IQueryable<User>>().Setup(m => m.GetEnumerator()).Returns(users.GetEnumerator);

        return usersMock.Object;
    }
}

La InitializeApiControllerméthode contient la viande et les pommes de terre.

Maintenant, nous pouvons écrire nos tests pour AccountController:

public class AccountControllerTests : BaseTest
{
    private readonly AccountController _accountController;

    public AccountControllerTests()
    {
        _accountController = new AccountController();
        InitializeApiController(_accountController);
    }

    [Test]
    public async Task GetShouldReturnOk()
    {
        var result = await _accountController.Get();
        var response = await result.ExecuteAsync(CancellationToken.None);
        Assert.AreEqual(HttpStatusCode.OK, response.StatusCode);
    }
}

Pour que tout fonctionne, vous devrez installer un tas de packages Microsoft.OWIN.*et Microsoft.AspNet.*, je vais coller mon packages.configici:

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="Castle.Core" version="4.3.1" targetFramework="net472" />
  <package id="EntityFramework" version="6.2.0" targetFramework="net472" />
  <package id="Microsoft.AspNet.Identity.Core" version="2.2.2" targetFramework="net472" />
  <package id="Microsoft.AspNet.Identity.EntityFramework" version="2.2.2" targetFramework="net472" />
  <package id="Microsoft.AspNet.Identity.Owin" version="2.2.2" targetFramework="net472" />
  <package id="Microsoft.AspNet.WebApi.Client" version="5.2.7" targetFramework="net472" />
  <package id="Microsoft.AspNet.WebApi.Core" version="5.2.7" targetFramework="net472" />
  <package id="Microsoft.AspNet.WebApi.Owin" version="5.2.7" targetFramework="net472" />
  <package id="Microsoft.Owin" version="4.0.1" targetFramework="net472" />
  <package id="Microsoft.Owin.Host.SystemWeb" version="4.0.1" targetFramework="net472" />
  <package id="Microsoft.Owin.Security" version="4.0.1" targetFramework="net472" />
  <package id="Microsoft.Owin.Security.Cookies" version="4.0.1" targetFramework="net472" />
  <package id="Microsoft.Owin.Security.OAuth" version="4.0.1" targetFramework="net472" />
  <package id="Moq" version="4.10.1" targetFramework="net472" />
  <package id="Newtonsoft.Json" version="12.0.1" targetFramework="net472" />
  <package id="NUnit" version="3.11.0" targetFramework="net472" />
  <package id="Owin" version="1.0" targetFramework="net472" />
  <package id="System.Runtime.CompilerServices.Unsafe" version="4.5.2" targetFramework="net472" />
  <package id="System.Threading.Tasks.Extensions" version="4.5.2" targetFramework="net472" />
</packages>

Le test est très simple, mais démontre que tout fonctionne :-)

Bon test!