Chia-Ping Tsai created KAFKA-16487:
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             Summary: Support to define server properties by ClusterTestDefaults
                 Key: KAFKA-16487
                 URL: https://issues.apache.org/jira/browse/KAFKA-16487
             Project: Kafka
          Issue Type: Test
            Reporter: Chia-Ping Tsai
            Assignee: PoAn Yang


Sometimes we want to define server properties for all test cases, and using 
`BeforeEach` to modify the `ClusterConfig` is the only way. The side effect is 
that the IDE does not like the style since IDE can't recognize custom 
ParameterResolver of `ClusterConfig`.

The alternative is that we can take `ClusterInstance` from constructor first, 
and then we modify the inner `ClusterConfig` in `BeforeEach` phase. However, 
that may confuse users about the life cycle of "configs".

In short, I prefer to define the server property by `ClusterTestDefaults`. It 
already includes some server-side default property, and we can enhance that to 
deal with more existent test case.



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