s3 adaptor unit test optimization

[baijiaruo]

Is your feature request related to a problem? (你需要的功能是否与某个问题有关?)
The current s3 adaptor only has integration tests, no complete unit tests, and needs to be supplemented

Describe the solution you'd like (描述你期望的解决方法)

Describe alternatives you've considered (描述你想到的折衷方案)

Additional context/screenshots (更多上下文/截图)