}
        }, "keyMatchHelper");

        // Execute without setting session ID
        String result = crawlJob.execute();

        assertNotNull(crawlJob.sessionId);
        // Check format: yyyyMMddHHmmss
        assertEquals(14, crawlJob.sessionId.length());
        assertTrue(crawlJob.sessionId.matches("\\d{14}"));
        assertTrue(result.contains("Session Id: " + crawlJob.sessionId));
    }

            assertNull(options.sessionId);

            // Simulate what process() does - generate default sessionId
            if (options.sessionId == null) {
                SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
                options.sessionId = sdf.format(new Date());
            }

            // Check that sessionId was generated
            assertNotNull(options.sessionId);

        return index + ".update";
    }

    private String createIndexName(final String index) {
        return index + '.' + ZonedDateTime.now().format(DateTimeFormatter.ofPattern("yyyyMMddHHmmss"));
    }

    private String getDefaultMappings() throws IOException {
        final StringBuilder mappingSource = new StringBuilder();
        try (BufferedReader br = new BufferedReader(new InputStreamReader(

        if (StringUtil.isBlank(options.sessionId)) {
            // use a default session id
            final SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
            options.sessionId = sdf.format(new Date());
        } else {
            options.sessionId = options.sessionId.replace('-', '_');
        }