assertEquals("should be equal", "333", example.getArticleName());
tx.commit();
// get from the database
tx = _kit.getTransaction(_conn);
tx.begin();
_conn.invalidate(oid);
example = (Article) _conn.getObjectByIdentity(oid);
assertEquals("should be equal", 7, example.getProductGroupId());
assertEquals("should be equal", "333", example.getArticleName());
example.setArticleName("334"); // test update