}

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

        user.setGivenName("John");
        assertEquals("John", user.getGivenName());
    }

    @Test
    public void test_user_surname() {
        final User user = new User();
        assertNull(user.getSurname());

                        .forEach(v -> modifyDeleteEntry(modifyList, attrSurname, v)));
        final String attrGivenName = fessConfig.getLdapAttrGivenName();
        OptionalUtil.ofNullable(user.getGivenName())
                .filter(StringUtil::isNotBlank)
                .ifPresent(s -> modifyReplaceEntry(modifyList, attrGivenName, s))
                .orElse(() -> getAttributeValueList(result, attrGivenName).stream()