dianfu edited a comment on issue #7253: [FLINK-11074] [table][tests] Enable 
harness tests with RocksdbStateBackend and add harness tests for 
CollectAggFunction
URL: https://github.com/apache/flink/pull/7253#issuecomment-445206839
 
 
   @twalthr @sunjincheng121 @walterddr  I have added an 
`AggFunctionHarnessTest` in another way from the current harness test by 
constructing the operator to test by compiling a sql query which can generate 
the operator, not by wrapping a hand written GeneratedAggregate directly. I 
think it has the following benefits:
   1) The harness test can also cover AggregateCodeGenerator as the operator is 
now code generated
   2) Writing a new harness test becomes easy. We just need to construct a sql 
query which can generate the operator we want to test
   3) We are able to test if the DataView is actually replaced with 
StateDataView
   
   Currently I have not changed other harness tests. We can improve other 
harness in this way in the following PRs once we are sure this direction is 
what we want.
   
   Could you help to take a look at this PR? Thanks a lot.

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