dongjoon-hyun opened a new pull request, #956:
URL: https://github.com/apache/spark-kubernetes-operator/pull/956
### What changes were proposed in this pull request?
This PR aims to run the `build-test` CI unit tests on each matrix JDK (21 /
25 / 26 / 27) instead of repeating the full build in every leg.
- Add an opt-in Gradle property, `-PtestJavaVersion=<N>`, to run the `test`
tasks on JDK `<N>`. Compilation still uses the JDK 27 toolchain.
- Run `./gradlew test -PtestJavaVersion=${{ matrix.java-version }}` instead
of `./gradlew build` in the `build-test` matrix. The linters keep running once
in the `lint` job.
### Why are the changes needed?
Currently, all matrix legs run the unit tests on the auto-provisioned JDK 27
toolchain, so Java 21, 25, and 26 are never tested. Also, every leg repeats the
linters, which already run in the `lint` job.
### Does this PR introduce _any_ user-facing change?
No. The default behavior is unchanged without the new property.
### How was this patch tested?
Pass the CIs. I also verified locally that all unit tests pass on JDK 21,
25, and 26 with the new property.
```
$ ./gradlew test -PtestJavaVersion=21
```
### Was this patch authored or co-authored using generative AI tooling?
Generated-by: Claude Opus 5.5
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