assertNotNull(result.getDocumentList());
        assertTrue(result.getDocumentList().isEmpty());
    }

    /**
     * Test SearchResult with documents.
     */
    @Test
    public void test_searchResultWithDocuments() {
        final Map<String, Object> doc1 = new HashMap<>();
        doc1.put("_id", "doc1");
        doc1.put("title", "Document 1");

        final Map<String, Object> doc2 = new HashMap<>();