public void test_addFavoriteCountField_withUrl() {
        final Map<String, Object> doc = new HashMap<>();
        doc.put("url", "http://example.com");

        ((TestSearchLogHelper) searchLogHelper).setFavoriteCount(5L);

        indexUpdater.addFavoriteCountField(doc);

        assertEquals(5L, doc.get("favorite_count"));
    }

    // Test addFavoriteCountField without URL