}

    @Test
    public void test_user_displayName() {
        final User user = new User();
        assertNull(user.getDisplayName());

        user.setDisplayName("John Doe");
        assertEquals("John Doe", user.getDisplayName());
    }

    @Test
    public void test_user_labeledURI() {
        final User user = new User();
        assertNull(user.getLabeledURI());

                        .forEach(v -> modifyDeleteEntry(modifyList, attrRegisteredAddress, v)));
        final String attrDisplayName = fessConfig.getLdapAttrDisplayName();
        OptionalUtil.ofNullable(user.getDisplayName())
                .filter(StringUtil::isNotBlank)
                .ifPresent(s -> modifyReplaceEntry(modifyList, attrDisplayName, s))
                .orElse(() -> getAttributeValueList(result, attrDisplayName).stream()

                        for (final String lang : supportedLanguages) {
                            final Locale locale = LocaleUtils.toLocale(lang);
                            final String label = locale.getDisplayName(displayLocale);
                            final Map<String, String> map = new HashMap<>(2);
                            map.put(Constants.ITEM_LABEL, label);
                            map.put(Constants.ITEM_VALUE, lang);