indexUpdater.addFavoriteCountField(doc);

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

    // Test ingest with null IngestFactory
    @Test
    public void test_ingest_nullIngestFactory() {
        ComponentUtil.register(null, "ingestFactory");
        indexUpdater.init();

        final Map<String, Object> doc = new HashMap<>();
        doc.put("test", "value");