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Today's #JCON Content Board Spotlight: Christian Stein (Oracle)

Programming since '98, now a mainline #developer of the #JDK, and working on #jtreg and #JUnit he truly has a deep technical knowledge.
Combined with a passion for simplifying, he's surely the right one.

Join #JCON2026 at https://2026.europe.jcon.one/

#JUnit builds and runs with #Java 27

✅ https://github.com/junit-team/junit-framework/pull/5206

Test early, test often.

I just sponsored the #junit team. Go sponsor your #opensource dependencies!

https://github.com/sponsors/junit-team?sp=eitch

Коротко про масштабирование UI-автотестов в Java

Привет, Хабр! В этой статье рассмотрим, как масштабировать UI-автотесты с помощью Java. Если у вас десяток тестов, проблем не возникнет, они бегают шустро и всем довольны. Но представьте абстрактный проект интернет-банка или маркетплейса, функциональность растёт, количество автотестов идёт на сотни (а то и тысячи). Последовательный запуск такой тестовой свиты может занять довольно большое время. Каждый релиз начинает тормозиться ожиданием результатов автотестов. Масштабирование тестов решает эту проблему: запускаем тесты параллельно, сокращаем время прогона и получаем быстрый фидбэк о качестве.

https://habr.com/ru/companies/otus/articles/969908/

#java #UIавтотесты #параллельный_запуск #Selenoid #Selenium_Grid #JUnit #TestNG #тестовые_данные

Ich liebe künstliche Intelligenz! 😂 Ein bisschen Spass am Montag... #chatgpt #junit

Ein Bildschirmfoto von ChatGPT, bei der ChatGPT die Existenz von JUnit 6 leugnet und felsenfest behauptet, dass es das nicht gibt, dass es nicht veröffentlicht wurde, dass nicht in Arbeit ist und auch nicht angekündigt wurde.

Instead of buying more stuff that I don’t really need, I’m sponsoring open source #Java projects that I rely on, starting with #JUnit and #AssertJ (via core maintainers Joel and Stefano).

If I was a big company using Java, I’d be embarrassed at not sponsoring these projects.

RE: https://mastodon.social/@APIdia/115587863622237679

To get started with #JUnit 6 you can explore its API now on #APIdia. Docs largely resemble #JavaDoc but are easier to browse and include the full dependency tree, consistently linked into the docs. Many other nice features to be found. Follow me or @APIdia to learn more.
#java #jvm @junit

Latest: https://apidia.net/mvn/org.junit/junit
JUnit 5: https://apidia.net/mvn/org.junit/junit/5
JUnit 4: https://apidia.net/mvn/junit/junit

#JUnit 5 supports #JUnit 4—but should you mix them? Jean Donato outlines a strategy for clean migration, better test hygiene & future-proofing your CI pipeline.
Avoid Frankenstein test classes: https://javapro.io/2025/09/10/mastering-junit-navigating-between-old-and-new-versions-for-a-smarter-test-strategy/

#Java #TDD #CleanCode #JAVAPRO @OpenRewrite @BeforeEach

Du willst, dass dein Team systematisch testet, & das auch richtig? Christopher Olbertz zeigt dir die passenden Tools für verschiedene Testarten:

✔️ Unit-Tests, Architektur-Checks, Mocking komplexer Abhängigkeiten

Lese: https://javapro.io/de/testen-mit-java-die-vielfaeltige-welt-der-test-frameworks/

#JUnit #Mockito #AssertJ #ArchUnit

API documentation of #JUnit 6 is now available on #APIdia. All artifacts of the latest release are conveniently browsable in one coherent doc profile. All dependencies are available as well and consistently linked to all occurrences in the API docs. Enjoy browsing!
https://apidia.net/mvn/org.junit/junit/6

#java #javadoc

@nipafx Injecting values into final fields is not supported by #JUnit. By design. Ensured by integration tests.

https://docs.junit.org/current/user-guide/#writing-tests-parameterized-tests-consuming-arguments-field-injection

Source code of a JUnit integration test ensuring values cannot be injected into final fields.

#JUnit 6.1.0-M1 is ready for testing!

✨ New org.junit.start module for usage in compact source files
⚙ Execution mode configuration support for dynamic tests and containers
🏊 New parallel test executor implementation without ForkJoinPool

https://docs.junit.org/6.1.0-M1/release-notes/

I recently read and shared You’re Wasting Time in #Java Without These 10 Libraries. I commented on it a bit in my newsletter, but given the amount and intensity of reactions, I think a full-blown post is in order.

* Project #Lombok
* #MapStruct
* #JUnit 5 & #Mockito
* #SLF4J with Logback
* Apache Commons Lang & Google Guava
* #Jackson
* Hibernate Validator
* #SpringFramework
* Apache HttpClient / OkHttp
* #Liquibase or #Flyway

https://blog.frankel.ch/wasting-time-without-10-libraries/

@phaus Looking forward to meeting you all and talk about JUnit.

Happy testing!

https://junit.org

#java #junit

Screenshot of a part of the junit.org website showing Latest Release and Upcoming Events, including the JUnit Insights Event happening in Cologne at the 20th of November 2025

I update too much when i should just stay put - the fair rationalization is i have pretty regular backups and can just revert back to working if update goes sideways - it used to happen a lot more #ci/cd #fomo #junit

Mock everything? Test nothing. @wbauweraerts makes the case for sociable testing: fewer mocks, better trust, faster builds.

Read how libraries like Instancio or Datafaker can make your test data resilient AND random: https://javapro.io/2025/08/28/testing-done-right/

#Java #Testing #OpenSource #JUnit