}

    @Test
    public void test_user_preferredLanguage() {
        final User user = new User();
        assertNull(user.getPreferredLanguage());

        user.setPreferredLanguage("en");
        assertEquals("en", user.getPreferredLanguage());
    }

    @Test
    public void test_user_destinationIndicator() {
        final User user = new User();

                setAttributeValue(result, fessConfig.getLdapAttrDisplayName(), o -> user.setDisplayName(o.toString()));
                setAttributeValue(result, fessConfig.getLdapAttrPreferredLanguage(), o -> user.setPreferredLanguage(o.toString()));
                setAttributeValue(result, fessConfig.getLdapAttrDepartmentNumber(), o -> user.setDepartmentNumber(o.toString()));