RFR: 8377244: Update ModuleReaderTest to JUnit prior to making changes

[Roger Riggs]

On Thu, 5 Feb 2026 14:39:51 GMT, David Beaumont <duke at openjdk.org> wrote:

> Updated legacy TestNG asserts to JUnit and added useful context to help debugging when assertions fail.

Looks good

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Marked as reviewed by rriggs (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/29588#pullrequestreview-3757778542