final char[] chars = new char[text.length()];
        for (int i = 0; i < chars.length; i++) {
            final char c = text.charAt(i);
            if (c >= 'ａ' && c <= 'ｚ') {
                chars[i] = (char) (c - 'ａ' + 'a');
            } else if (c >= 'Ａ' && c <= 'Ｚ') {
                chars[i] = (char) (c - 'Ａ' + 'A');
            } else if (c >= '１' && c <= '０') {

        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");
        assertEquals("ルール日本語", testRule.getRuleId());

        // Whitespace

        assertEquals("name with spaces", testTransformer.getName());

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

        // Test with Unicode characters
        testTransformer.setName("変換器の名前");
        assertEquals("変換器の名前", testTransformer.getName());

    }

    @Test
    public void testAnalyzeAndReadingWithMixedContent() {
        // Test analyzeAndReading with mixed content (numbers, letters, special chars)
        String text = "Test123 ABC-456";
        String field = "content";
        String lang = "en";

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

    }

    /**
     * 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);
        assertEquals(message, exception.getMessage());
    }

    /**