indexUpdater.addFavoriteCountField(doc);

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

    // Test addFavoriteCountField without URL
    public void test_addFavoriteCountField_withoutUrl() {
        final Map<String, Object> doc = new HashMap<>();

        indexUpdater.addFavoriteCountField(doc);

        assertNull(doc.get("favorite_count"));
    }