Stefano Cordio

Stefano Cordio

@scordio.github.io

Software Engineer @ EPAM Systems Maintainer of @assertj.github.io

627 followers188 following133 posts

Stefano Cordio
@scordio.github.io

bugs.openjdk.org/browse/JDK-8... will reduce the size of the Javadoc bundled fonts starting from Java 28. However, avoiding inclusion by default was rejected: bugs.openjdk.org/browse/JDK-8...

bugs.openjdk.orgLoading...JDK-8387386 Default to --no-fonts in javadoc
Thomas Vitale ☀️@thomasvitale.com

So now I'm adding this configuration to all my Java projects. For the Arconia Framework, that meant going from 200MB to 8MB total release size (many artifacts). Considering the new publishing limits set by Sonatype, that makes a huge difference! Also, no wonder the disk storage costs are so high!

Stefano Cordio reposted

TestLens
@testlens.app

When we started TestLens, we knew who we were building it for: teams that take their test suites seriously. So it means a lot that some of the most widely used testing projects in the JVM world now use TestLens on their own pull requests. 👉️ Read more: testlens.app/blog/2026/09... #java #junit

testlens.appLeading Open Source Projects Trust TestLensJUnit Framework, AssertJ, Apache Groovy, Apache Grails, and Spock Framework are early adopters of TestLens.

Stefano Cordio reposted

GitHub
@github.com

In Session 4 of the GitHub Secure Open Source Fund, 50 projects upgraded their security posture through AI-assisted workflows, maintainer expertise, GitHub security tools, and more. As AI changes how software is built, maintainers remain at the center of protecting the open source ecosystem. 👇

github.blogWhat 50 open source projects taught us about security in the AI eraSee how the projects in the GitHub Secure Open Source Fund combined AI-assisted workflows, maintainer expertise, and more to improve project security.

Stefano Cordio reposted

Daniel Garnier-Moiroux
@garnier.wf

Replying to @garnier.wf

Y'all are creating a lot of noise, and not doing _any_ of the engineering work. When we say "not like this because <reason>" and get an LLM-generated fix within 5 minutes, what have you learned? Have you furthered your understanding of the project so that the next PR is better?

Stefano Cordio reposted

JUnit Team
@junit.org

Ever needed help with a JUnit test or extension? Core JUnit team members now offer commercial support with OpenElements. ✅ 4–8 support hours per month ✅ Guaranteed response times ✅ Quarterly expert webinar ✅ Monthly newsletter Unused hours go back into JUnit. open-elements.com/support-care...

open-elements.comSupport & Care - Open ElementsSupport & Care is a program for the sustainable further development, stabilization and support of open source software (OSS).
Stefano Cordio
@scordio.github.io

Today is another day when I spend time with Kotlin upgrade PRs that fail because CodeQL is behind. If you have faced the same issue, help get some traction at github.com/github/codeq...

github.comConsider testing CodeQL also against Kotlin EA versions · Issue #22219 · github/codeqlDescription of the issue For some time now, all projects using Kotlin and CodeQL face the following situation: A new Kotlin version is released Dependabot, Renovate, or equivalent creates a PR to u...
Stefano Cordio
@scordio.github.io

I had a blast at JUG Lucerne, with a small but engaging crowd whom I spent almost three hours with! 😍 What stuck with me the most: • AssertJ should be renamed to AssertJoy • They would love a hands-on follow-up with more advanced use cases Many thanks again to @mcpringle.bsky.social for having me!

Stefano Cordio@scordio.github.io

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/...

jug.chJava User Group Switzerland: Event "What's wrong with AssertJ?! - How a decade of technical debt is addressed in version 4.0"AssertJ has been a player in Java testing for over a decade, providing an intuitive set of strongly typed assertions designed to maximize test readability. Since the launch of version 3.0, the library...
Stefano Cordio
@scordio.github.io

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/...

jug.chJava User Group Switzerland: Event "What's wrong with AssertJ?! - How a decade of technical debt is addressed in version 4.0"AssertJ has been a player in Java testing for over a decade, providing an intuitive set of strongly typed assertions designed to maximize test readability. Since the launch of version 3.0, the library...
Stefano Cordio
@scordio.github.io

Now the Java User Group in Zurich knows what's wrong with AssertJ! And also how we're working to improve things. We're still in the early stages, but I can't wait to see all this work shipped to our users 🚀 Thank you so much to everyone who joined and @patbaumgartner.com for hosting! I had a blast!

Stefano Cordio
@scordio.github.io

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/...

jug.chJava User Group Switzerland: Event "What's wrong with AssertJ?! - How a decade of technical debt is addressed in version 4.0"AssertJ has been a player in Java testing for over a decade, providing an intuitive set of strongly typed assertions designed to maximize test readability. Since the launch of version 3.0, the library...
Stefano Cordio
@scordio.github.io

I'm a huge fan of data-driven and parameterized testing, and always want to keep test code as readable and maintainable as production code. What you get: 🍃 @SpringConversion → Tap into Spring Framework's type conversion 🔢 @Bytes, @Base64, and @Hex → Decode strings directly into byte arrays 🧵

Stefano Cordio reposted

JCON Conference
@jcon.one

Excited for #JCON EUROPE 2026? See Tim te Beek at #JCON2026 in Cologne talking about 'Better Assertions with #AssertJ' Not all testing #libraries are equal. Sure they all run your #tests, but what happens when they fail? “Expected ‘true’, … 🎟️ 2026.europe.jcon.one/tickets Free for #JUG members

Stefano Cordio
@scordio.github.io

I attended Simon's workshop on Vaadin and Karibu Testing a couple of years ago, and I still remember the wow factor when I realized how easily you can have the entire stack in Java, with amazing end-to-end test coverage. Highly recommended stack, especially for enterprise and business applications!

Simon Martinelli@martinelli.ch

Vaadin has one huge advantage over many other frontend technologies: true browser-less testing. In my article, I show how you can test Vaadin applications without starting a browser, using Karibu-Testing.

martinelli.chBrowserless Testing of Vaadin Applications with Karibu Testing - MartinelliIn modern web development, testing is essential for ensuring the reliability and performance of applications. For developers working with Vaadin, one of the best testing tools is Karibu Testing. This…
Stefano Cordio
@scordio.github.io

📢 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 🚀

Stefano Cordio
@scordio.github.io

What an honor to meet one of my Spring heroes! 🍃

Patrick Baumgartner@patbaumgartner.com

@odrotbohm.de talks today at the JUG in Zürich about "Domain-centric? Why Hexagonal And Onion Architecture Are Answers to The Wrong Question – And What To Ask Instead". Full house on a Wednesday! Thanks everyone for joining 🚀✨❄️

Stefano Cordio reposted

Patrick Baumgartner
@patbaumgartner.com

@odrotbohm.de talks today at the JUG in Zürich about "Domain-centric? Why Hexagonal And Onion Architecture Are Answers to The Wrong Question – And What To Ask Instead". Full house on a Wednesday! Thanks everyone for joining 🚀✨❄️

Stefano Cordio reposted

Mark Paluch 👨‍💻,🎹&✈️
@mp911.de

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

IntelliJ IDEA, a JetBrains IDE@intellijidea.com

The Spring Data JDBC is growing and IntelliJ IDEA provides first-class support for it! ✅ Create entities from DB tables ✅ Generate scripts for Liquibase / Flyway ✅ Create repositories from usage + auto-wiring ✅ Column-to-code completion Read more 👉 jb.gg/39id13

blog.jetbrains.comSpring Data JDBC Made Easy with IntelliJ IDEA | The IntelliJ IDEA BlogIn this article, you will learn how to use Spring Data JDBC by leveraging IntelliJ IDEA's powerful features and become more productive in your development process.

Stefano Cordio reposted

Oliver Drotbohm
@odrotbohm.de

Replying to @odrotbohm.de

If you're closer to the Zurich area, you can see the talk at the local Java User Group on February, 4th.

jug.chJava User Group Switzerland: Event "Domain-centric? Why Hexagonal And Onion Architecture Are Answers to The Wrong Question – And What To Ask Instead"To separate technical from domain code, architectural approaches like Hexagonal or Onion Architecture are currently all the rage. However, discussions about their semantic details and their mapping to...

Stefano Cordio reposted

Andres Almiray
@andresalmiray.com

Closing the latest chapter in my career. Actively looking to get started with the next one. If you’re looking for a seasoned developer for DevRel, DevOps, and/or engineering roles, let’s chat!