**Key Test Areas**:
- Resource closure on successful extraction (MS Office extractors)
- Resource closure on failed extraction
- Improved error messages with context
- Input validation using `validateInputStream()`

**Covered Extractors**:
- MsWordExtractor
- MsExcelExtractor
- MsPowerPointExtractor
- TextExtractor

**Test Count**: 8 tests

**Key Scenarios**:
- ✅ Successful extraction closes resources properly

                }
            }
        });
        refresh();
    }

    /**
     * Indexes suggest data from documents.
     *
     * @param success A callback for successful indexing.
     * @param error   A callback for indexing errors.
     */
    public void indexFromDocuments(final Consumer<Boolean> success, final Consumer<Throwable> error) {

        final StandardCrawlerContainer container = new StandardCrawlerContainer().singleton("textExtractor", TextExtractor.class);
        textExtractor = container.getComponent("textExtractor");
    }

    /**
     * Test successful text extraction with default encoding (UTF-8).
     */
    public void test_getText_withDefaultEncoding() {
        final String testContent = "Test content テスト 日本語";

                .singleton("msPowerPointExtractor", MsPowerPointExtractor.class)
                .singleton("textExtractor", TextExtractor.class);
    }

    /**
     * Test that MsWordExtractor properly closes resources on successful extraction.
     */
    public void test_MsWordExtractor_closesResourcesOnSuccess() throws IOException {
        final MsWordExtractor extractor = container.getComponent("msWordExtractor");

 *   <li>Concurrent crawling of multiple data configurations</li>
 *   <li>Thread pool management for crawler execution</li>
 *   <li>Session-based crawling with cleanup operations</li>
 *   <li>Old document deletion after successful crawling</li>
 *   <li>Crawling execution monitoring and timing</li>
 * </ul>
 */
public class DataIndexHelper {

    /** Logger instance for this class */

    /**
     * Processes thumbnail generation with a consumer function.
     * @param id The document ID.
     * @param consumer The consumer function to process thumbnail and config ID.
     * @return True if processing was successful, false otherwise.
     */
    protected boolean process(final String id, final BiPredicate<String, String> consumer) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();

     * @param id the document ID to update
     * @param field the field name to update
     * @param value the new value for the field
     * @return true if the update was successful, false otherwise
     */
    public boolean updateDocument(final SearchEngineClient searchEngineClient, final String id, final String field, final Object value) {

     *
     * @param id The document ID to update
     * @param field The field name to update
     * @param value The new value for the field
     * @return true if the update was successful, false otherwise
     */
    public boolean update(final String id, final String field, final Object value) {

     * @param thumbnailId The ID of the thumbnail to generate.
     * @param outputFile The file where the thumbnail will be saved.
     * @return True if thumbnail generation was successful, false otherwise.
     */
    @Override
    public boolean generate(final String thumbnailId, final File outputFile) {
        if (logger.isDebugEnabled()) {

import java.io.InputStream;
import java.nio.charset.StandardCharsets;

import org.junit.Test;

/**
 * Test class for resource loading functionality in Suggester class.
 *
 * Tests cover:
 * - Successful resource loading
 * - Missing resource error handling
 * - Resource content validation
 * - InputStream null safety in try-with-resources
 */
public class SuggesterResourceLoadingTest {

    /**