roles.add("guest_role1");
            roles.add("guest_role2");
            return roles;
        }

        @Override
        public boolean getApiAccessTokenRequiredAsBoolean() {
            return false;
        }
    }

    static class MockSystemHelper extends SystemHelper {
        @Override
        public long getCurrentTimeAsLong() {

                        .orElse(() -> {
                            if (isApiRequest && ComponentUtil.getFessConfig().getApiAccessTokenRequiredAsBoolean()) {
                                throw new InvalidAccessTokenException("invalid_token", "Access token is requried.");
                            }