'Test the listing collection is using
ESAppFeedCollectionSerializer if no background image.'

def test_home_serializer_promo_coll(self):

    self.collection.update(type=feed.COLLECTION_PROMO)
    self.data_es = self.collection.get_indexer().extract_document(None, obj=self.collection)
    data = serializers.FeedCollectionESHomeSerializer(self.data_es, context=self.context).data
    assert ('author' not in data['apps'][0])
    assert ('name' not in data['apps'][0])
    assert ('ratings' not in data['apps'][0])
    assert data['apps'][0]['icons']
