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JUnit Framework, AssertJ, Apache Groovy, Apache Grails, and Spock Framework are early adopters of TestLens.

Description 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...

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...

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...

Collection of argument converters for JUnit parameterized testing

The GitHub Secure Open Source Fund helped 67 critical AI‑stack projects accelerate fixes, strengthen ecosystems, and advance open source resilience.

AssertJ provides Fluent testing assertions for Java and the Java Virtual Machine (JVM). Starting in version 1.4.0 and prior to version 3.27.7, an XML External Entity (XXE) vulnerability exists in `org.assertj.core.util.xml.XmlStringPrettyFormatter`: the `toXmlDocument(String)` method initializes `DocumentBuilderFactory` with default settings, without disabling DTDs or external entities. This formatter is used by …

🔒 Security Core Fix XXE vulnerability in isXmlEqualTo assertion (CVE-2026-24400) See GHSA-rqfh-9r24-8c9r for details; many thanks to @wxt201 and @Song-Li for responsibly reporting it! 🚫 Deprec...

JUnit is maintained by a team of passionate volunteers. This is your chance to give back and support the project!

We recently talked about how version 4 still needs a bit more work and probably won't be ready until at least the first half of 2026. Releasing a new major version is a rare opportunity for us: we ...

The Apple Calculator leaked 32GB of RAM.

💥 Breaking Changes Jimfs JUnit Jupiter now requires Java 17, in line with JUnit 6 requirements. ⚡ Improvements Add user guide #41 🔨 Dependency Upgrades Upgrade to JUnit 6 #29

🐛 Bug Fixes Core Add missing export for org.assertj.core.annotation #3951 ❤️ Contributors Thanks to all the contributors who worked on this release: @duponter

⚡ Improvements Core ByteBuddy in AssertJ 3.27.4 not compatible with Java 25 #3946 🔨 Dependency Upgrades Core Upgrade to Byte Buddy 1.17.7 #3947 Upgrade to JUnit BOM 5.13.4 #3947 Guava Upgrade ...

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Introduction If you don't know what a soft assertion is, please read Soft Asserts – Why should you use them for Unit and Integration tests? This article is a continuation of Assert with Grace: Custom…

🚫 Deprecated Core Deprecate org.assertj.core.annotations.Beta in favor of org.assertj.core.annotation.Beta Deprecate org.assertj.core.util.CanIgnoreReturnValue in favor of org.assertj.core.annotat...

Introduction If you don't know what a soft assertion is, please read Soft Asserts – Why should you use them for Unit and Integration tests? This article is a continuation of Assert with Grace: Custom…

AssertJ is a library providing easy to use rich typed assertions - assertj/assertj

Sometimes, users and contributors would like to engage more interactively with both maintainers and the rest of the community, and communicating via GitHub might feel intimidating.

In Java, writing tests often involves comparing objects to ensure they meet expected conditions. Typically, developers use assertions to…

🧩 Binary Compatibility This release is binary incompatible with the previous major version. 💥 Breaking Changes Raise required Java version to 17 #3447 🚫 Deprecated Set since = "3" and forRemoval...

💥 Breaking Changes Core Revert "Propagate common basetype for the extracting method" #3737 Details The enhancement introduced with #3673 breaks existing code on Kotlin 1.9; therefore, it has been...

🚫 Deprecated Core Deprecate usingComparatorForFields and remove deprecated assertions from usingComparatorForType documentation #3711 Deprecate hasCauseReference(Throwable) from Throwable assertio...

What's an assertion? It's a way to test an assumption in the code normally associated with an expected result, where we will compare it to the current outcome. We all know a lot of different…