[code-reflection] RFR: Use JUnit instead of TestNG

[Maurizio Cimadamore]

On Fri, 12 Sep 2025 17:42:38 GMT, Mourad Abbay <mabbay at openjdk.org> wrote:

> Use JUnit instead of TestNG

Aside from @PaulSandoz comment, PR looks good

test/langtools/tools/javac/reflect/TestIRFromAnnotation.java line 68:

> 66:                                                 // in method superInterfaceMethodInvocation
> 67:             "LocalClassTest.java",              // name of local classes is not stable at annotation processing time
> 68:             "TestLocalCapture.java",            // plain junit test

When looking again at this, it would perhaps be beneficial to put all the IR tests in a separate folder. It seems a bit sad that whenever we add a "plain" test we have to come back and list it here.

The exclusion for `SuperTest`/`LocalClassTest` of course make more sense, so it's ok for them to stay.

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Marked as reviewed by mcimadamore (Reviewer).

PR Review: https://git.openjdk.org/babylon/pull/566#pullrequestreview-3224337709
PR Review Comment: https://git.openjdk.org/babylon/pull/566#discussion_r2348821943