Julien Roy

No good weather today 🌧️ ☔ so why not join me in JUG Lucerne and find out what a handful of developers are doing to ship the next major version of AssertJ? 🧑‍💻 www.jug.ch/html/events/...

#JUnit 6.1.0 is released! 🕑 Built-in extensions for locale, time zone, and system properties 🚮 Configurable TempDir deletion strategy 🏃‍➡️ New org.junit.start module for compact source files ⚙️ Execution mode config for dynamic tests 🏊 New parallel test executor impl. docs.junit.org/6.1.0/releas...

Less than a week to go! 🚀 Join me this Tuesday at PH Zürich to discover how AssertJ 4 is about breaking things (carefully) to make your testing life better. Come for the technical debt, stay for the drinks and networking! 🍻 www.jug.ch/html/events/...

Today, from the venue of Spring I/O, I'm open-sourcing a new library to make data-driven testing in Java a little bit easier: JUnit Converters! A collection of ready-to-use argument converters designed to streamline parameterized testing in JUnit 6 (and 5!) 🚀 🧵 stefano.codes/junit-conver...

Moving beyond Strings in Spring Data spring.io/blog/2026/02...

Please do not use System.currentTimeMillis() to measure elapsed time: develotters.com/posts/how-no...

📢 AssertJ joined the GitHub Secure Open Source Fund, a program that leveled up security across 67 open source projects. What changed for us: SHA pinning, immutable releases, incident response plan, and a mindset shift toward security awareness 🔒 The impact? More robust JVM assertions 🚀

Using the #JDK HttpClient, or … not. Well it depends on each one’s use cases. blog.arkey.fr/2026/02/08/t...

First-class support for Spring Data JDBC in IntelliJ IDEA. Well done 👏🥳

A free SQL explain plan visualizer tool by @datadoghq Currently for PostgreSQL, MySQL, MSSQL and MongoDB explain.datadoghq.com

#CSRF Protection without Tokens or Hidden Form Fields https://blog.miguelgrinb... #infosec

Kotlin 2.3.0 is out! Check out the highlights of this release on the Kotlin blog. 👉 https://kotl.in/trf88y

The IntelliJ IDEA 2025.3 release has landed! This version brings several significant updates, all of which are described and demoed on our What’s New page. Check it out! 👇

Great post from @infoq.com on on Spring Boot 4.0 and Spring Framework 7 features: www.infoq.com/news/2025/11...

⚡ Amper 0.9.0 is here! ⚡ • First preview of extensibility and plugins • Dependency resolution graph caching • Auto-sync in the IDE (using IntelliJ IDEA 2025.3 Beta) Release notes 👉 kotl.in/amper090-github Blog post 👉 https://kotl.in/amper090

🎄 Join us live for five days of Advent of Code puzzles and Kotlin livestreams on December 1–5! Solve puzzles in Kotlin with help from team experts and guest creators, climb the leaderboard, learn new tricks, and get a chance to win prizes along the way with fun!! 💜 blog.jetbrains.com/kotlin/2025/...

#Kotlin 2.2.0: Game-Changing Features That Will Transform Your Development Workflow https://medium.com/@shar...

Master Spring Data AOT in IntelliJ IDEA blog.jetbrains.com/idea/2025/11...

Exciting News 🎉 Spring Boot 4.0.0 is here: spring.io/blog/2025/11...

🤔 Who said that AssertJ 3 is in maintenance mode? 📢 We're planning an exceptional 3.28 release – let us know what you'd like to see in there! 👇 github.com/orgs/assertj...

After a year of work, we are happy to share that Spring Framework 7.0 GA is now available! spring.io/blog/2025/11... Time to celebrate, get a bit of rest and help the team to prepare Spring Boot 4.0 GA release planned November 20th 😊 #spring #java

Hack.Commit.Push Switzerland is just one week away! 🇨🇭 This is a great opportunity to get involved in Open Source projects like @assertj.github.io, with direct guidance from the maintainers!

#JUnit 6.0.0 is released! ✨ Java 17 and Kotlin 2.2 baseline 🌄 JSpecify nullability annotations 🛫 Integrated JFR support 🚟 Kotlin suspend function support 🛑 Support for cancelling test execution ⏭️ New `--fail-fast` mode for ConsoleLauncher 🧹 Removal of deprecated APIs docs.junit.org/6.0.0/releas...

📢 AssertJ 3.27.6 has been released! This fixes a 🐛 regression related to the module descriptor 🧩 Happy assertions! github.com/assertj/asse...

Architectural #Patterns, The Pattern Language of #SoftwareArchitecture Consider supporting the authors on Leanpub: leanpub.com/metapatterns

📢 Jimfs JUnit Jupiter 0.3.2 has been released! 🛠️ This release upgrades Jimfs and JUnit to their latest versions. 🧑‍💻 Any feedback is welcome! github.com/scordio/jimf...

OkHttp 5.0 has a stable API. 🗿

Ey, ey, ey, so much going on, I forgot to tell you about my vacation Newscast. 🤦‍♂️ Check it out to learn how to transform cryptographic objects to PEM texts and vice versa with #Java 25 (or to speedrun my Ibiza vacation): www.youtube.com/watch?v=hqvM...

"Rich Errors in Kotlin” – the KotlinConf’25 talk by Michail Zarečenskij is now live on our YouTube channel! 🎉📺 Discover how Kotlin’s nullability model can be generalized to restricted union types for better error handling. 👉 Watch the full video: kotl.in/richerrors

The new Spring Debugger recently released by JetBrains is IMO a game changer in terms of DevXP, both for the Spring team and for Spring Boot application developers. blog.jetbrains.com/idea/2025/06...

Donald Knuth's "premature optimization is the root of all evil" was about micro-optimizations. Designing your application to read and write data efficiently is not really premature optimization. It's software engineering.

Spring Boot 3.5.0 is available now! spring.io/blog/2025/05...

If you need a quick introduction to AssertJ-DB, my talk at Devoxx is available on youtube : youtu.be/XILu4r3rIEc #AssertJDB #AssertJ #tests

jackson-jr is nice. github.com/FasterXML/ja...

📢 AssertJ 4.0.0-M1 has been released! 🚀 Required Java version increased to 17 🧩 Module-only build and modular Javadoc 🚫 Existing deprecations marked for removal Happy assertions! github.com/assertj/asse...

A complete list of the top 100 most watched software engineering talks of 2024 ordered by the number of views. www.techtalksweekly.io/p/100-most-w... #webdev #programming

📢 Jimfs JUnit Jupiter 0.3.0 has been released! 🐛 This fixes the module name that hasn't followed the reverse DNS convention. 🛠️ I used the occasion to make the module descriptor IDE-friendly and enable modular Javadoc! 🧑‍💻 Any feedback is welcome! github.com/scordio/jimf...

Je serai à @devoxxfr.bsky.social en avril pour vous parler de #assertj-db 🎉

Kotlin cheatsheet I made for #FOSDEM. It's hard to keep everything in one page so it really only covers the essentials.

#FullStack or Fully Stretched? How the Tech Industry Turned Developers into Coding Chimeras

github.com/roastedroot/... - A pure #java SQLite JDBC driver AOT compiled from c -> #WASM -> JVM Bytecode using chicory.dev AOT build time compiler. This opens the door for many tools and libraries to be easily ported to the JVM with no native dependencies..amazing 🤯

📢 AssertJ 3.27.3 has been released! This delivers a 💥 breaking change that reverts a feature from 3.27.0 incompatible with @kotlinlang.org 1.9. Happy assertions! github.com/assertj/asse...

I'm very excited that @spring.io is switching from a Contributor License Agreement to a Developer Certificate of Origin! We're looking forward to seeing more & simplified contributions from you! If you have any questions, reach out to us in our issue trackers. spring.io/blog/2025/01...

📢 AssertJ 3.27.1 has been released! A few 🚫 deprecations and 🐛 bug fixes to celebrate the new year 🎇 This also marks 3.x entering maintenance mode and the beginning of 4.x development 🚀 Many thanks to all contributors and happy assertions! github.com/assertj/asse...

check out ghostty.org I've been using for a while - it's great! ✨ ... and it's just been open-sourced on github.com/ghostty-org/...

For AssertJ 4, we wanted to upgrade to Java 17. However, we are discussing whether to stay on 8 or upgrade to 11. The main reason is to keep our effort reasonable and continue supporting users who cannot upgrade yet (e.g., RHEL 7 users under ELS). Any strong reason to keep upgrading to Java 17?

We just merged the current status of the upcoming JDWP support for @graalvm.org Native Image! 🥳 This will soon provide developers with the same debugging experience they are used to in Java, but for native images! Stay tuned for more details. github.com/oracle/graal...

AssertJ 3.27.0 has been released! • One 🚫 deprecation • Many ✨ new features, ⚡️ improvements, and 🐛 bug fixes Many thanks to all contributors and happy assertions! github.com/assertj/asse...

My second blog post on Aurora DSQL, with a deep dive on how reads work: brooker.co.za/blog/2024/12...