[jira] [Work started] (NUTCH-3145) Upgrade to JUnit 6

["Lewis John McGibbney (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NUTCH-3145?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on NUTCH-3145 started by Lewis John McGibbney.
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> Upgrade to JUnit 6
> ------------------
>
>                 Key: NUTCH-3145
>                 URL: https://issues.apache.org/jira/browse/NUTCH-3145
>             Project: Nutch
>          Issue Type: Improvement
>          Components: test
>            Reporter: Lewis John McGibbney
>            Assignee: Lewis John McGibbney
>            Priority: Minor
>             Fix For: 1.22
>
>
> JUnit 6 was released on September 30, 2025 (with the latest patch 6.0.2 on January 6, 2026). It builds directly on JUnit 5's Jupiter model, so core annotations, extensions, and test-writing philosophy remain largely unchanged. The transition should be MUCH smoother than from JUnit 4 to 5 (NUTCH-2887).
>  
> |Aspect|JUnit 5|JUnit 6|
> |--------|---------|---------|
> |*Latest Stable Version*|5.14.x series|6.0.2 (released January 6, 2026)|
> |*Minimum Java Version*|Java 8|Java 17|
> |*Minimum Kotlin Version*|Lower versions supported|Kotlin 2.2+|
> |*Versioning Scheme*|Platform had separate versioning (e.g., 1.x); Jupiter and Vintage shared 5.x|Unified single version across Platform, Jupiter, and Vintage (e.g., all 6.0.2)|
> |*Vintage Engine (JUnit 3/4 support)*|Fully supported|Deprecated (with INFO-level warnings during discovery); intended only for temporary migration|
> |*Removed Modules*|Included junit-platform-runner and junit-platform-jfr|Both modules removed|
> |*CSV Parsing (@CsvSource, @CsvFileSource)*|Used univocity-parsers|Migrated to FastCSV (faster, better error handling, RFC-compliant; minor behavior differences for malformed input)|
> |*Kotlin Support*|Limited coroutine integration|Native support for suspend modifier on test and lifecycle methods|
> |*Nullability Annotations*|No built-in support|Integrates JSpecify (@Nullable, @NonNull) for improved static analysis|
> |*Other Notable Changes*| -  |Deterministic (but non-obvious) ordering of @Nested classes<br>Cancellation/fail-fast support improvements<br>Removal of many deprecated APIs<br>Built-in enhancements for performance and modern JDK compatibility|
> |*Migration Effort*| -  |Generally low for pure Jupiter tests; main impacts are Java version upgrade and Vintage deprecation. See official migration guide: [https://github.com/junit-team/junit-framework/wiki/Upgrading-to-JUnit-6.0]|
> JUnit 6 is an evolutionary update focused on modernization, cleanup, and dropping legacy support. Most existing Jupiter tests run unchanged.
>  



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