assertEquals("Doc2", subList.get(1).get("title"));
        assertEquals("Doc3", subList.get(2).get("title"));
    }

    @Test
    public void test_listOperations_toArray() {
        List<Map<String, Object>> documentList = new ArrayList<>();
        Map<String, Object> doc1 = new HashMap<>();
        doc1.put("title", "Doc1");
        Map<String, Object> doc2 = new HashMap<>();