g.setName(name);
g.setDescription(new Text(descr));
g.setImageBlobKey(imageKey);
g.setParentKeyStr(KeyFactory.keyToString(categoryKey));
dh.persistGood(g.toJson());
assertEquals(1,
ds.prepare(new Query(Good.KIND)).countEntities(withLimit(10)));
List<Entity> list = ds.prepare(new Query(Good.KIND)).asList(