}

    // Test multiple appends to the same buffer
    @Test
    public void test_multipleAppends() {
        StringBuilder buf = new StringBuilder();

        monitorTarget.append(buf, "key1", () -> "value1");
        buf.append(",");
        monitorTarget.append(buf, "key2", () -> 123);
        buf.append(",");
        monitorTarget.append(buf, "key3", () -> null);

                    logger.debug("[EXPORT] Processing: count={}", currentCount);
                }
                return true;
            });
            resultBuf.append("Exported ").append(count).append(" documents.");
            if (logger.isInfoEnabled()) {
                logger.info("[EXPORT] Completed: exportedCount={}, elapsedTime={}ms", count, System.currentTimeMillis() - startTime);
            }

        final StringBuilder buf = new StringBuilder((int) (content.length() * 1.3));
        buf.append(prefix).append(1).append(':').append(values[0]);
        for (int i = 1; i < values.length; i++) {
            buf.append('\n').append(prefix).append(i + 1).append(':').append(values[i]);
        }
        return buf.toString();
    }

            }
            sb.append('[')
                    .append(timestamp)
                    .append("] ")
                    .append(event.getLevel())
                    .append(' ')
                    .append(event.getLoggerName())
                    .append(" - ")
                    .append(message)
                    .append('\n');
            if (sb.length() > maxDetailsLength) {

            buf.append(',');
            buf.append("\"page_number\":");
            buf.append(currentPageNumber);
            buf.append(',');
            buf.append("\"record_count\":");
            buf.append(allRecordCount);
            buf.append(',');
            buf.append("\"record_count_relation\":");
            buf.append(escapeJson(allRecordCountRelation));
            buf.append(',');
            buf.append("\"page_count\":");

        buf.append("{\"@timestamp\":\"").append(valueMap.remove("time")).append('"');
        buf.append(",\"log.level\":\"INFO\"");
        buf.append(",\"ecs.version\":\"").append(ecsVersion).append('"');
        buf.append(",\"service.name\":\"").append(ecsServiceName).append('"');
        buf.append(",\"event.dataset\":\"").append(ecsEventDataset).append('"');

    }

    @Test
    public void test_append_multipleEvents() {
        appender.append(createLogEvent(Level.ERROR, "org.codelibs.fess.a", "error 1"));
        appender.append(createLogEvent(Level.ERROR, "org.codelibs.fess.b", "error 2"));
        appender.append(createLogEvent(Level.ERROR, "org.codelibs.fess.c", "error 3"));

        buf.append("12345ABCDE");
        request.setParameter("userCode", buf.toString());
        assertNotNull(userInfoHelper.getUserCodeFromRequest(request));
        buf.append("12345ABCDE");
        request.setParameter("userCode", buf.toString());
        assertNotNull(userInfoHelper.getUserCodeFromRequest(request));
        buf.append("12345ABCDE");

            docContext.append("[").append(index).append("] ");
            if (StringUtil.isNotBlank(title)) {
                docContext.append(sanitizeDocumentContent(title)).append("\n");
            }
            if (StringUtil.isNotBlank(url)) {
                docContext.append("URL: ").append(sanitizeDocumentContent(url)).append("\n");
            }

        document.prependChild(new DocumentType("html", "", ""));
        document.head().
                append("<meta charset='utf-8'>").
                append("<meta name='viewport' content='width=device-width, initial-scale=1'>").
                append("<title>Gradle @version@ Release Notes</title>").
                append("<link rel='stylesheet' type='text/css' href='https://assets.gradle.com/lato/css/lato-font.css'/>");