Pkblobs newRecord = new Pkblobs();
newRecord.setBlob1(generateRandomBlob());
PkblobsExample example = new PkblobsExample();
example.createCriteria().andIdGreaterThan(4);
int rows = dao.updateByExampleSelective(newRecord, example);
assertEquals(1, rows);
List<Pkblobs> answer = dao.selectByExampleWithBLOBs(example);
assertEquals(1, answer.size());