ruanhang1993 edited a comment on pull request #18847:
URL: https://github.com/apache/flink/pull/18847#issuecomment-1047904508


   @slinkydeveloper , Thanks for your work.
   `MiniClusterWithClientExtension` is aimed to replace the Junit 4 rule 
`MiniClusterWithClientResource` for Junit 5 miguration. The same is the 
`MiniClusterExtension` for `MiniClusterResource`. Because of some unresolved 
discussions, these extensions are only used in one or two classes as an example.
   
   The `MiniClusterWithClientResource` rule could be used as `@Rule` or 
`@ClassRule`. In order to resolve conflicts, we introduce each/all wrappers for 
Junit 5 extensions.  Maybe you can search the usages of 
`MiniClusterWithClientResource`. I think it is better to adapt `@Rule` and 
`@ClassRule` in Junit 5 when refactoring.
   
   To be honest, I don't understand why the `MiniClusterResource` is used as a 
`@Rule` to start and end a mini cluster for every test cases. 
   
   


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