2010YOUY01 commented on PR #27048:
URL: https://github.com/apache/datafusion/pull/27048#issuecomment-6624800665

   @alamb THanks for the review!
   
   > What I don't understand is the new crate structure and then the need to 
partially expose some of the existing testing code from the physical expr crate
   
   It was intended to keep the PR small, but this make the structure confusing.
   
   This is fixed in 
[dd6f892](https://github.com/apache/datafusion/pull/27048/commits/dd6f892d874447bc38a7f718f5e00484363cef2a):
 the idea is the fuzzing implementation all lives in `datafusion-fuzz` crate, 
and since the testing target should be public interface (`SpillPool` in this 
case), so no extra public API change would be needed, only need to move the 
fuzzing implementation.
   
   RE another major concern for this PR:
   > why did you make a new crate? Why not just a module in the existing 
datafusion crate?
   
   I think this structure is clearer. Otherwise, integration tests would 
include regular, extended (slow), and fuzzing tests, making it awkward to 
maintain or run only a subset of them.
   
   Since splitting them doesn't seem to introduce any other issues, I went with 
the clearer structure.


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