import org.codelibs.fess.util.MemoryUtil;
import org.codelibs.fess.util.ThreadDumpUtil;
import org.opensearch.action.search.SearchRequestBuilder;
import org.opensearch.index.query.QueryBuilder;
import org.opensearch.index.query.QueryBuilders;
import org.opensearch.search.sort.SortOrder;

import jakarta.annotation.PostConstruct;
import jakarta.annotation.PreDestroy;
import jakarta.annotation.Resource;

/**

import org.codelibs.fess.unit.UnitFessTestCase;
import org.codelibs.fess.util.ComponentUtil;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.TestInfo;
import org.opensearch.index.query.QueryBuilder;

public class DataIndexHelperTest extends UnitFessTestCase {

    private DataIndexHelper dataIndexHelper;

    @Override
    protected void setUp(TestInfo testInfo) throws Exception {

     * This method queries the search engine for child documents and extracts their URLs.
     *
     * @param searchEngineClient the search engine client to query
     * @param id the parent document ID to find children for
     * @return a set of RequestData objects for the child URLs, or null if no children found
     */

labels.lastAccessTime=上次訪問時間
labels.notificationTo=通知對象
labels.num=數量
labels.pn=頁碼
labels.protocolScheme=方案
labels.purgeByBots=按機器人清除
labels.logLevel=日誌級別
labels.purgeSearchLogDay=刪除搜尋日誌
labels.query=查詢
labels.queryId=查詢ID
labels.rt=rt
labels.searchLog=搜尋日誌
labels.sort=排序
labels.start=開始位置
labels.loginRequired=需要登入
labels.loginLink=顯示登入連結
labels.threadName=執行緒名稱
labels.url=URL
labels.userFavorite=收藏日誌

			<form action="<%=request.getContextPath()%>/admin/searchlist/search" method="GET" class="form-inline mt-2 sidebar-search">
				<div class="input-group">
					<input class="form-control form-control-sidebar" name="q" id="query"
						   maxlength="1000"
						   placeholder="<la:message key="labels.sidebar.placeholder_search" />">
					<div class="input-group-append">
						<button class="btn btn-sidebar" type="submit" name="search" id="search-btn">

labels.notificationTo=Уведомление для
labels.num=Число
labels.pn=Номер страницы
labels.protocolScheme=Схема
labels.purgeByBots=Очистить ботов
labels.logLevel=Уровень журнала
labels.purgeSearchLogDay=Очистить журнал поиска
labels.query=Запрос
labels.queryId=ID запроса
labels.rt=rt
labels.searchLog=Журнал поиска
labels.sort=Сортировка
labels.start=Старт
labels.loginRequired=Требуется вход
labels.loginLink=Показать ссылку для входа

    public void test_deleteForm_fields() {
        final DeleteForm form = new DeleteForm();
        assertNull(form.q);
        assertNull(form.docId);

        form.q = "test query";
        form.docId = "doc-123";

        assertEquals("test query", form.q);
        assertEquals("doc-123", form.docId);
    }

    @Test
    public void test_listForm_defaults() {
        final ListForm form = new ListForm();

## Language Detection and Selection

### User Interface Language

Fess determines the UI language in this order:

1. **Query parameter**: `?browser_lang=[locale]` (highest priority)
2. **Browser header**: `Accept-Language` header
3. **Fallback**: English (from `fess_label.properties` and `fess_message.properties`)

### Document Language Detection

    @Test
    public void test_getCachedFacetResponse() {
        ViewHelper viewHelper = new ViewHelper();
        viewHelper.init();

        try {
            viewHelper.getCachedFacetResponse("test query");
            assertTrue(true);
        } catch (Exception e) {
            assertTrue(true);
        }
    }

    @Test
    public void test_asContentResponse() {

import org.codelibs.fess.opensearch.client.SearchEngineClient;
import org.codelibs.fess.util.ComponentUtil;
import org.lastaflute.di.core.SingletonLaContainer;
import org.opensearch.index.query.QueryBuilders;

/**
 * Implementation of IndexUpdateCallback that handles file list index updates with concurrent processing.