}

    @Test
    public void test_user_employeeNumber() {
        final User user = new User();
        assertNull(user.getEmployeeNumber());

        user.setEmployeeNumber("EMP001");
        assertEquals("EMP001", user.getEmployeeNumber());
    }

    @Test
    public void test_user_givenName() {
        final User user = new User();
        assertNull(user.getGivenName());

                setAttributeValue(result, fessConfig.getLdapAttrMail(), o -> user.setMail(o.toString()));
                setAttributeValue(result, fessConfig.getLdapAttrEmployeeNumber(), o -> user.setEmployeeNumber(o.toString()));
                setAttributeValue(result, fessConfig.getLdapAttrTelephoneNumber(), o -> user.setTelephoneNumber(o.toString()));