assertNotNull(urlFilter);
    }

    /**
     * Test special characters in URL patterns
     */
    public void test_specialCharactersInPatterns() {
        String sessionId = "test-session-018";
        urlFilter.init(sessionId);

        // Test patterns with special regex characters
        urlFilter.addInclude("https://example\\.com/\\?.*");

        }
        testRule.setRuleId(longId.toString());
        assertEquals(longId.toString(), testRule.getRuleId());

        // Special characters in rule ID
        testRule.setRuleId("rule-id_with.special@chars#123");
        assertEquals("rule-id_with.special@chars#123", testRule.getRuleId());

        // Unicode characters
        testRule.setRuleId("ルール日本語");

        // Test special characters
        String specialText = "テスト@#$%^&*()";
        String specialId = SuggestUtil.createSuggestTextId(specialText);
        assertNotNull(specialId);
        assertEquals(Base64.getEncoder().encodeToString(specialText.getBytes(CoreLibConstants.CHARSET_UTF_8)), specialId);
    }

    @Test

 * FileTransformer stores the content of a crawled resource as a file on the file system.
 * It extends HtmlTransformer and provides functionality to:
 * </p>
 * <ul>
 *     <li>Specify a base directory for storing files.</li>
 *     <li>Generate file paths from URLs, replacing special characters.</li>
 *     <li>Handle duplicated file paths by appending a counter.</li>
 *     <li>Store the file path in the result data.</li>

        assertNotNull(tokens);
        assertTrue(tokens.isEmpty());
    }

    @Test
    public void testAnalyzeWithSpecialCharacters() {
        // Test analyze with special characters
        String text = "******@****.*** #hashtag $100";
        String field = "content";
        String lang = "en";

        List<AnalyzeToken> tokens = analyzer.analyze(text, field, lang);

        assertNotNull(results);
    }

    @Test
    public void testConvertWithSpecialCharacters() throws IOException {
        // Test convert with special characters
        String text = "test@#$%123";
        String field = "content";

        List<String> results = converter.convert(text, field, "en");

        assertNotNull(results);
    }

    }

    /**
     * Test name with special characters
     */
    public void test_name_specialCharacters() {
        // Test with spaces
        testTransformer.setName("name with spaces");
        assertEquals("name with spaces", testTransformer.getName());

        // Test with special characters
        testTransformer.setName("name-with_special.chars#123");

        assertEquals(240000, exception.getMessage().length());
    }

    /**
     * Test constructor with special characters in message
     */
    public void test_constructor_withSpecialCharactersInMessage() {
        String message = "Error: \n\t\r\0\b\f with special chars #@!$%^&*()[]{}";
        CrawlerSystemException exception = new CrawlerSystemException(message);

        assertNotNull(exception);

    }

    /**
     * Test rule with special characters in conditions
     */
    public void test_specialCharactersInConditions() {
        ConfigurableRule rule = new ConfigurableRule();
        rule.setRuleId("specialRule");
        rule.setResponseProcessor(new TestResponseProcessor("specialProcessor"));

        // Test with regex special characters

        assertTrue(tags == elevateWord.getTags());
        assertTrue(roles == elevateWord.getRoles());
    }

    @Test
    public void testWithSpecialCharactersInWord() {
        // Test with special characters in word
        String word = "test@#$%^&*()_+-=[]{}|;':\",./<>?";
        float boost = 1.0f;
        List<String> readings = Arrays.asList("reading1");
        List<String> fields = Arrays.asList("field1");