Mocking new Microsoft Entity Framework Identity UserManager and RoleManager

Question

Has anyone come up with a successful mocking solution for UserManager and RoleManager? I have been beating my head against a wall all day. All I wa

Answer 1

Here is an explicit version of Rubito's excellent answer for NET Core 3.1 without the null, null, nulls:

public static UserManager GetUserManager(IUserStore store = null) 
    where TUser : class
{
    // https://github.com/aspnet/Identity/blob/master/test/Shared/MockHelpers.cs
    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: store, 
        optionsAccessor: options.Object, 
        passwordHasher: new PasswordHasher(),
        userValidators: userValidators,
        passwordValidators: pwdValidators, 
        keyNormalizer: new UpperInvariantLookupNormalizer(),
        errors: new IdentityErrorDescriber(), 
        services: null,
        logger: new Mock>>().Object);
    validator.Setup(v => v.ValidateAsync(userManager, It.IsAny()))
        .Returns(Task.FromResult(IdentityResult.Success)).Verifiable();
    return userManager;
}