LdapManager ldapManager = new LdapManager();
        ldapManager.init();

        // Unicode characters should pass through unchanged
        assertEquals("テスト", ldapManager.escapeLDAPSearchFilter("テスト"));
        assertEquals("用户", ldapManager.escapeLDAPSearchFilter("用户"));
        assertEquals("사용자", ldapManager.escapeLDAPSearchFilter("사용자"));
    }

    @Test

        exp = "http://example.com/index.html";
        assertEquals(exp, transformer.decodeUrlAsName(url, false));

        url = "http://example.com/" + encodeUrl("テスト ") + ".html";
        exp = "http://example.com/テスト .html";
        assertEquals(exp, transformer.decodeUrlAsName(url, false));

        url = "file://C++.doc";
        exp = "file://C++.doc";

        discloser.setSubject("テスト件名 🚀");
        discloser.setPlainText("テスト内容です。\n改行もあります。");

        String result = notificationHelper.toSlackMessage(discloser);

        assertNotNull(result);
        // Unicode characters may be escaped in JSON
        assertTrue(result.contains("テスト") || result.contains("\\u"));
    }

    @Test

        result = KuromojiCSVUtil.quoteEscape(input);
        assertEquals("tab\tcharacter", result);

        // Unicode
        input = "日本語,テスト";
        result = KuromojiCSVUtil.quoteEscape(input);
        assertEquals("\"日本語,テスト\"", result);

        // Emoji with quotes
        input = "\"🚀\" rocket";
        result = KuromojiCSVUtil.quoteEscape(input);

            }
        }
    }

    @Test
    public void test_getSearchEngineHttpAddress_withUnicodeCharacters() {
        String testAddress = "http://テスト.example.com:9200";
        String originalValue = System.getProperty(Constants.FESS_SEARCH_ENGINE_HTTP_ADDRESS);

        try {
            System.setProperty(Constants.FESS_SEARCH_ENGINE_HTTP_ADDRESS, testAddress);

                props.setProperty(FessEnv.MAIL_SUBJECT_TEST_PREFIX, "[テスト環境]");
                props.setProperty(FessEnv.MAIL_RETURN_PATH, "******@****.***");
                return props;
            }
        };

        assertEquals("smtp-relay.example.com:465", specialMailEnv.getMailSmtpServerMainHostAndPort());
        assertEquals("[テスト環境]", specialMailEnv.getMailSubjectTestPrefix());

        // ## Assert ##
        assertEquals("", result);
    }

    @Test
    public void test_GetContentAsString_UnicodeContent() {
        // ## Arrange ##
        String content = "日本語テスト 🎉";
        CurlResponse response = new CurlResponse();
        response.setEncoding("UTF-8");
        response.setContentCache(new ContentCache(content.getBytes(java.nio.charset.StandardCharsets.UTF_8)));

    }

    // Test append with Unicode characters
    @Test
    public void test_append_unicodeCharacters() {
        StringBuilder buf = new StringBuilder();
        Supplier<Object> supplier = () -> "テスト 测试 테스트 🎉";

        monitorTarget.append(buf, "unicodeKey", supplier);
        // Unicode characters are escaped in JSON format

        // Test with file path containing special characters
        Path tempDir = Files.createTempDirectory("test-スレッドダンプ-dir");
        Path tempFile = tempDir.resolve("thread-dump-テスト.txt");

        try {
            ThreadDumpUtil.writeThreadDump(tempFile.toString());

            assertTrue("File with special characters should be created", Files.exists(tempFile));

        // ## Arrange ##
        File tmpFile = File.createTempFile("cache-test-", ".tmp");
        tmpFile.deleteOnExit();
        String content = "日本語テスト Unicode content 🎉";
        java.nio.file.Files.write(tmpFile.toPath(), content.getBytes("UTF-8"));
        ContentCache cache = new ContentCache(tmpFile);

        // ## Act ##