assertEquals(Arrays.asList("aaa", "bbb"), (List<String>) DocumentUtil.getValue(doc, "key1", List.class));
    }

    @Test
    public void test_integer() {
        Map<String, Object> doc = new HashMap<>();

        int expected3 = 999;
        doc.put("key3", expected3);
        assertEquals(expected3, DocumentUtil.getValue(doc, "key3", Integer.class));

        String stringResult = WebApiUtil.getObject("testString");
        assertNull(stringResult, "Should return null in test environment");

        Integer intResult = WebApiUtil.getObject("testInteger");
        assertNull(intResult, "Should return null in test environment");

        Object objectResult = WebApiUtil.getObject("testObject");
        assertNull(objectResult, "Should return null in test environment");