assertTrue(result.contains("3 docs")); // 3 documents processed
        assertFalse(result.contains("exception"));
    }

    // Test execute() method with query builder
    public void test_execute_withQueryBuilder() {
        QueryBuilder queryBuilder = QueryBuilders.termQuery("field", "value");
        updateLabelJob.query(queryBuilder);

        String result = updateLabelJob.execute();
        assertNotNull(result);