doc.put("content", "コンテンツ");

        languageHelper.updateDocument(doc);

        assertEquals("ja", doc.get("lang"));
        assertEquals("既存のタイトル", doc.get("title_ja")); // Should remain unchanged
        assertEquals("コンテンツ", doc.get("content_ja"));
    }

    @Test
    public void test_detectLanguage_blank() {
        assertNull(languageHelper.detectLanguage(null));

        try {
            // Test multiple value changes
            String[] testValues = { "http://localhost:9200", "https://elasticsearch.example.com", "http://127.0.0.1:9201",
                    "https://search.domain.com:443" };

            for (String testValue : testValues) {
                System.setProperty(Constants.FESS_SEARCH_ENGINE_HTTP_ADDRESS, testValue);
                String result = SystemUtil.getSearchEngineHttpAddress();

# Hibernate Validator
# -------------------
constraints.CreditCardNumber.message = {item} ist eine ungültige Kreditkartennummer.
constraints.EAN.message = {item} ist ein ungültiger {type}-Barcode.
constraints.Email.message = {item} ist keine gültige E-Mail-Adresse.
constraints.Length.message = Die Länge von {item} muss zwischen {min} und {max} liegen.
constraints.LuhnCheck.message = Die Luhn-Modulo-11-Prüfsumme von {value} ist falsch.

      editorial revisions, annotations, elaborations, or other modifications
      represent, as a whole, an original work of authorship. For the purposes
      of this License, Derivative Works shall not include works that remain
      separable from, or merely link (or bind by name) to the interfaces of,
      the Work and Derivative Works thereof.

      "Contribution" shall mean any work of authorship, including

# ----------------------------------------------------------
# Hibernate Validator
# -------------------
constraints.CreditCardNumber.message = {item} 不是有效的信用卡號。
constraints.EAN.message = {item} 不是有效的 {type} 條碼。
constraints.Email.message = {item} 不是有效的電子郵件地址。
constraints.Length.message = {item} 的長度必須在 {min} 到 {max} 之間。
constraints.LuhnCheck.message = {value} 的 Luhn Modulo 11 檢查碼不正確。
constraints.Mod10Check.message = {value} 的 Modulo 10 檢查碼不正確。

        int firstSize = facetQueryView.getQueryMap().size();
        int firstQueriesCount = testFacetInfo.getAddedQueries().size();

        // Call init again
        facetQueryView.init();

        // Size should remain the same
        assertEquals(firstSize, facetQueryView.getQueryMap().size());
        // But queries would be added again to FacetInfo (distinct handles duplicates)

        String url = "http://example.com/test";
        StringBuilder longMessageBuilder = new StringBuilder("Error: ");
        for (int i = 0; i < 1000; i++) {
            longMessageBuilder.append("detail ").append(i).append(" ");
        }
        String longMessage = longMessageBuilder.toString();
        Exception cause = new RuntimeException("Error cause");

            } catch (final Exception e) {
                logger.warn("Failed to send notification mail.", e);
            }

        }
    }

    /**
     * Sends email notification with crawling results and statistics.
     * The email contains detailed information about the crawling session including
     * execution times, index sizes, and status information.
     *

      editorial revisions, annotations, elaborations, or other modifications
      represent, as a whole, an original work of authorship. For the purposes
      of this License, Derivative Works shall not include works that remain
      separable from, or merely link (or bind by name) to the interfaces of,
      the Work and Derivative Works thereof.

      "Contribution" shall mean any work of authorship, including

    /**
     * Creates a QueryResponseList containing the search results and metadata.
     * Wraps the document list with additional information about the search operation
     * including record counts, timing, and pagination details.
     *
     * @param documentList the list of search result documents
     * @param allRecordCount the total number of records found