### 4. Error Messages
- ✅ Encoding information in TextExtractor errors
- ✅ File type context in MS Office errors
- ✅ Archive type in archive extractor errors

## Testing Best Practices

1. **Isolation**: Each test is independent and doesn't affect others
2. **Clarity**: Test names clearly describe what is being tested
3. **Coverage**: Both success and failure paths are tested

 * and DI container integration.
 *
 * <p>Thread Safety: This class is thread-safe. Each evaluate() call creates
 * a new GroovyShell instance to ensure thread isolation.</p>
 *
 * <p>Resource Management: GroovyClassLoader instances are properly managed
 * and cleaned up after script evaluation to prevent memory leaks.</p>
 */
public class GroovyEngine extends AbstractScriptEngine {

        // Backup system properties to restore them after each test
        originalSystemProperties = (Properties) System.getProperties().clone();
        // Reset static state of the Handler class before each test for isolation
        resetHandlerState();
        handler = new Handler(mockCifsContext);
    }

    @AfterEach
    void tearDown() throws Exception {
        // Restore system properties and clean up static state

        final AtomicReference<String> otherThreadContextSessionId = new AtomicReference<>();

        Thread otherThread = new Thread(() -> {
            try {
                // Should be null in other thread (ThreadLocal isolation)
                assertNull(CrawlingParameterUtil.getUrlQueue());
                assertNull(CrawlingParameterUtil.getCrawlerContext());

                // Set different values in other thread

 *   <li>Selective crawling based on configuration IDs</li>
 *   <li>Document expiration handling</li>
 *   <li>Hot thread monitoring for performance analysis</li>
 *   <li>Process isolation with separate JVM</li>
 * </ul>
 */
public class CrawlJob extends ExecJob {

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

    /**

        // Create a completely isolated context to avoid handle reuse issues on Linux Docker
        try {
            // Create a new context with fresh configuration each time
            // This ensures complete isolation between operations
            Properties props = new Properties();
            props.setProperty("jcifs.smb.client.minVersion", "SMB202");
            props.setProperty("jcifs.smb.client.maxVersion", "SMB311");

            closeableContext.close();
            closeableContext.close(); // Second call
            closeableContext.close(); // Third call
        });
    }

    @Test
    @DisplayName("Should maintain key isolation between instances")
    void testKeyIsolationBetweenInstances() {
        // Given
        byte[] key1 = new byte[16];
        byte[] key2 = new byte[16];
        new SecureRandom().nextBytes(key1);

  5. A program that contains no derivative of any portion of the
Library, but is designed to work with the Library by being compiled or
linked with it, is called a "work that uses the Library".  Such a
work, in isolation, is not a derivative work of the Library, and
therefore falls outside the scope of this License.

  However, linking a "work that uses the Library" with the Library

abs .nav-link {\n  margin-bottom: -1px;\n  background-color: transparent;\n  border: 1px solid transparent;\n  border-top-left-radius: 0.25rem;\n  border-top-right-radius: 0.25rem;\n}\n\n.nav-tabs .nav-link:hover, .nav-tabs .nav-link:focus {\n  isolation: isolate;\n  border-color: #e9ecef #e9ecef #dee2e6;\n}\n\n.nav-tabs .nav-link.disabled {\n  color: #6c757d;\n  background-color: transparent;\n  border-color: transparent;\n}\n\n.nav-tabs .nav-link.active,\n.nav-tabs .nav-item.show .nav-link {\n...

 border: var(--bs-nav-tabs-border-width) solid transparent;\n  border-top-left-radius: var(--bs-nav-tabs-border-radius);\n  border-top-right-radius: var(--bs-nav-tabs-border-radius);\n}\n.nav-tabs .nav-link:hover, .nav-tabs .nav-link:focus {\n  isolation: isolate;\n  border-color: var(--bs-nav-tabs-link-hover-border-color);\n}\n.nav-tabs .nav-link.disabled, .nav-tabs .nav-link:disabled {\n  color: var(--bs-nav-link-disabled-color);\n  background-color: transparent;\n  border-color: transparent;\n}\n.nav-tabs...