assertEquals("{\"size\":1,\"query\":{\"match_all\":{\"boost\":1.0}}}", resultMap.get("query"));
        assertEquals(1, documents.size());
    }

    @Test
    public void test_calculateDocumentSize_withNullValue() {
        final Map<String, Object> docMap = new HashMap<>();
        docMap.put("id", "test");
        docMap.put("nullField", null);

        long size = indexingHelper.calculateDocumentSize(docMap);