* to interact with SMB resources.
 *
 * <p>
 * This client supports authentication, content retrieval, and metadata extraction from SMB files.
 * It handles file access, directory listing, and access control entries (ACEs) processing.
 * </p>
 *
 * <p>
 * The class provides methods to:
 * </p>
 * <ul>
 *   <li>Initialize the client with SMB authentication details.</li>

/**
 * Service class for managing user operations in the Fess search system.
 * This service provides CRUD operations for user management, including user authentication,
 * password management, and user listing with pagination support.
 *
 */
public class UserService {

    private static final Logger logger = LogManager.getLogger(UserService.class);

    /**
     * Default constructor for UserService.
     */

 *   <li>Content length validation</li>
 *   <li>MIME type detection</li>
 *   <li>Handling of large files through temporary file storage</li>
 *   <li>Object metadata and tags retrieval</li>
 *   <li>Directory listing capabilities</li>
 * </ul>
 *
 * <p>The client handles timeout management for access operations and includes proper
 * resource cleanup mechanisms.
 */
public class S3Client extends AbstractCrawlerClient {

 * to interact with SMB resources.
 *
 * <p>
 * This client supports authentication, content retrieval, and metadata extraction from SMB files.
 * It handles file access, directory listing, and access control entries (ACEs) processing.
 * </p>
 *
 * <p>
 * The class provides methods to:
 * </p>
 * <ul>
 *   <li>Initialize the client with SMB authentication details.</li>

 *   <li>Content length validation</li>
 *   <li>MIME type detection</li>
 *   <li>Handling of large files through temporary file storage</li>
 *   <li>Object metadata retrieval</li>
 *   <li>Directory listing capabilities</li>
 * </ul>
 *
 * <p>The client handles timeout management for access operations and includes proper
 * resource cleanup mechanisms.
 */
public class GcsClient extends AbstractCrawlerClient {

        }
    }

    public void test_directory_child_urls() throws Exception {
        // Test that childUri (not typo chileUri) is correctly used in directory listing
        FtpServer server = null;
        try {
            String username = "testuser";
            String password = "testpass";
            server = startFtpServer(FTP_PORT, username, password);

 *   <li>Content length validation</li>
 *   <li>MIME type detection</li>
 *   <li>Handling of large files through temporary file storage</li>
 *   <li>Object metadata and tags retrieval</li>
 *   <li>Directory listing capabilities</li>
 * </ul>
 *
 * <p>The client handles timeout management for access operations and includes proper
 * resource cleanup mechanisms.
 *
 */
public class StorageClient extends AbstractCrawlerClient {

                }
            }
        }
    }

    /**
     * Retrieves response data from the FTP server for the specified URI.
     * This method handles the actual FTP operations including directory listing,
     * file retrieval, and metadata extraction.
     *
     * @param uri The URI to retrieve data from
     * @param includeContent Whether to include the actual content in the response

**Key Test Areas**:
- Parameter handling (null, empty, missing)
- Special character handling
- Input stream validation (not consumption)
- Edge cases (long filenames, paths, whitespace)

**Test Count**: 10 tests

**Key Scenarios**:
- ✅ Valid filename extraction
- ✅ Null parameters handling
- ✅ Empty/missing resource name
- ✅ Special characters in filename (Japanese, paths)

        client.admin().indices().prepareDelete(indexName).execute().actionGet();
        suggester.shutdown();
    }

    /**
     * Test getIndicesForAlias method with non-existing alias.
     * Verifies that the method returns an empty list for non-existing alias.
     */
    @Test
    @SuppressWarnings("unchecked")
    public void testGetIndicesForAlias_nonExistingAlias() throws Exception {