CODEWITHSUNDEEP
c#asp.net-mvcunit-testingasp.net-identitymoq
Ben Rubin
Ben Rubin

Reputation: 7341

Returning users from mocked ApplicationUserManager.Users

I am trying to mock ApplicationUserManager.Users so that I can test a controller method. My controller is

public class ManageController : Controller
{
    private readonly ApplicationUserManager userManager;

    public ManagerController(ApplicationUserManager userManager)
    {
        this.userManager = userManager;
    }

    // The method being tested
    public ActionResult ListUsers()
    {
        // I want this to return my mocked user list
        var users = this.userManager.Users.ToList();

        // Do other stuff
    }
}

My test method is 

[TestMethod]
public void ListUsersGet_ShouldSucceed()
{
    var users = new List<ApplicationUser>
    {
        new ApplicationUser { Id = "1", FirstName = "Test", LastName = "User" }
    }.AsQueryable();
    Mock<DbSet<ApplicationUser>> dbSet = new Mock<DbSet<ApplicationUser>>();
    dbSet.As<IQueryable<ApplicationUser>>().Setup(e => e.ElementType).Returns(users.ElementType);
    dbSet.As<IQueryable<ApplicationUser>>().Setup(e => e.Expression).Returns(users.Expression);
    dbSet.As<IQueryable<ApplicationUser>>().Setup(e => e.GetEnumerator()).Returns(users.GetEnumerator());
    dbSet.As<IQueryable<ApplicationUser>>().Setup(e => e.Provider).Returns(users.Provider);

    Mock<MyContext> context = new Mock<MyContext>();
    context.Setup(e => e.Users).Returns(dbSet.Object);

    Mock<UserStore<ApplicationUser>> userStore = new Mock<UserStore<ApplicationUser>>(context.Object);

    var controller = new ManageController(new ApplicationUserManager(userStore.Object));

    var result = controller.ListUsers() as ViewResult;

    // Assert some stuff
}

When I step into my controller method, I can see that users is null. It appears that this.userManager.Users isn't returning the users that I tried to set up in my test method.

How can I get this.userManager.Users.ToList() to return my test users?

Upvotes: 2

Views: 955

Answers (1)

Nkosi
Nkosi

Reputation: 247018

User manager exposes public virtual IQueryable<TUser> Users { get; } property. Mock the user manager dependency and give that to the controller.

public void _ListUsersGet_ShouldSucceed() {
    // Arrange.
    var users = new List<ApplicationUser>
    {
        new ApplicationUser { Id = "1", FirstName = "Test", LastName = "User" }
    }.AsQueryable();

    //Only mocking this because we need it to initialize manager.
    var userStore = Mock.Of<IUserStore<ApplicationUser>>();

    var userManager = new Mock<ApplicationUserManager>(userStore);
    userManager.Setup(_ => _.Users).Returns(users);

    var controller = new ManageController(userManager.Object);

    // Act.
    var result = controller.ListUsers() as ViewResult;

    // Assert some stuff
}

Check the Quick start documentation to get more acquainted with the mocking framework

Upvotes: 4

Related Questions