// Should handle null session ID gracefully
        assertNotNull(urlFilter);
    }

    /**
     * Test initialization with empty session ID
     */
    public void test_init_withEmptySessionId() {
        urlFilter.init("");
        // Should handle empty session ID gracefully
        assertNotNull(urlFilter);
    }

    /**
     * Test adding a single include pattern
     */

            final SAXParser parser = spfactory.newSAXParser();
            try {
                parser.setProperty(XMLConstants.ACCESS_EXTERNAL_DTD, StringUtil.EMPTY);
                parser.setProperty(XMLConstants.ACCESS_EXTERNAL_SCHEMA, StringUtil.EMPTY);
            } catch (final Exception e) {
                if (logger.isDebugEnabled()) {
                    logger.debug("Failed to set a property.", e);
                }

        try {
            parser.setProperty(XMLConstants.ACCESS_EXTERNAL_DTD, StringUtil.EMPTY);
            parser.setProperty(XMLConstants.ACCESS_EXTERNAL_SCHEMA, StringUtil.EMPTY);
        } catch (final Exception e) {
            if (logger.isDebugEnabled()) {
                logger.debug("Failed to set a property.", e);
            }
        }

        assertTrue(elevateWord.getRoles().isEmpty());
    }

    @Test
    public void testConstructorWithEmptyLists() {
        // Test constructor with empty lists
        String word = "empty lists";
        float boost = 1.0f;
        List<String> readings = Collections.emptyList();
        List<String> fields = Collections.emptyList();
        List<String> tags = Collections.emptyList();

     */
    public void register(final List<String> keyList) {
        if (keyList == null || keyList.isEmpty()) {
            throw new IllegalArgumentException("keyList must not be null or empty.");
        }
        getExtractorFactory().addExtractor(keyList, this);
    }

    /**
     * Returns the MimeTypeHelper instance from the CrawlerContainer.
     * @return The MimeTypeHelper instance.
     */

        assertEquals("\\*\\*\\*\\?\\?\\?", escaped5);

        // Test empty string
        String query6 = "";
        String escaped6 = SuggestUtil.escapeWildcardQuery(query6);
        assertEquals("", escaped6);
    }

    @Test
    public void testGetAsListWithEmptyList() {
        // Test with empty list
        List<String> emptyList = new ArrayList<>();

    }

    /**
     * Create mapping if empty.
     * @param index Index
     * @param type Type
     * @param client OpenSearch client
     */
    protected void createMappingIfEmpty(final String index, final String type, final Client client) {
        final String actualIndex = index + "." + type.toLowerCase(Locale.ENGLISH);
        try {
            boolean empty;
            try {

     * @param extractor the extractor to add
     * @throws CrawlerSystemException if the key list is null or empty, or if the extractor is null
     */
    public void addExtractor(final List<String> keyList, final Extractor extractor) {
        if (keyList == null || keyList.isEmpty()) {
            throw new CrawlerSystemException("The key list is empty.");
        }
        keyList.stream().distinct().forEach(key -> addExtractor(key, extractor));

        if (in == null) {
            throw new CrawlerSystemException("The inputstream is null.");
        }
        final String content = params.getOrDefault(ExtractData.RESOURCE_NAME_KEY, StringUtil.EMPTY);
        try {
            return new ExtractData(content);
        } catch (final Exception e) {
            throw new ExtractException(e);
        }
    }

     *
     * @param uri the URI to preprocess
     * @return the preprocessed URI
     * @throws CrawlerSystemException if the URI is empty
     */
    protected String preprocessUri(final String uri) {
        if (StringUtil.isEmpty(uri)) {
            throw new CrawlerSystemException("The uri is empty.");
        }

        return uri;
    }

    /**
     * Returns the character set for the given SMB1 file.