java web框架中service层调用本service层方法，方法不自动提交

@Transtional
class TestServiceImpl implement TestService{
@autowired
private TestDao testDao；

@override
public testA(){
Test test = new Test("this is a test");
this.testB(test);
}

@override
public testB(Test test){
testDao.save(test);
}
}