How to mock UserManager in .Net Core testing?

Question

I have following code. Im trying to running a test case for create user.Following is what i have tried so far.

public class CreateUserCommandHandlerTest
{
          


        

Answer 1

aspnet/Identity is opensource so what you can do is see how they mock it themselves.

Here's how they do it: MockHelpers.cs

TestUserManager

public static UserManager TestUserManager(IUserStore store = null) where TUser : class
{
    store = store ?? new Mock>().Object;
    var options = new Mock>();
    var idOptions = new IdentityOptions();
    idOptions.Lockout.AllowedForNewUsers = false;
    options.Setup(o => o.Value).Returns(idOptions);
    var userValidators = new List>();
    var validator = new Mock>();
    userValidators.Add(validator.Object);
    var pwdValidators = new List>();
    pwdValidators.Add(new PasswordValidator());
    var userManager = new UserManager(store, options.Object, new PasswordHasher(),
        userValidators, pwdValidators, new UpperInvariantLookupNormalizer(),
        new IdentityErrorDescriber(), null,
        new Mock>>().Object);
    validator.Setup(v => v.ValidateAsync(userManager, It.IsAny()))
        .Returns(Task.FromResult(IdentityResult.Success)).Verifiable();
    return userManager;
}