Instancio

Instancio 6.0.0-RC2 is out! This release includes improved Kotlin support through the new instancio-kotlin dependency. Any feedback would be appreciated! github.com/instancio/inst…

We're looking to improve Instancio's API for Kotlin users and would love your input! If you use Kotlin, please share your feedback: github.com/instancio/inst…

A big thank you to our new sponsor @cybozu!❤️ cybozu.co.jp/en/company/

Claude just made the test suite pass by rewriting the failing test to test only part of the functionality --while retaining the original name, which implied the more stringent test

🤔 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/d…

Slash your @springframework integration test times! ⚡ Waiting forever for builds? Spring Test Profiler reveals why your Spring TestContext Caching is missing its mark. ✅ Identify cache misses ✅ Optimize test context reuse ✅ Get faster feedback Free & open-source! github.com/PragmaTech-Gmb…

Jessica: Do think one day people will look back and ask how America could let this this happen? Me: A lot of people are already asking that today.

Instancio 5.5.0 is out! This release includes minor enhancements/fixes and housekeeping items. Next major release of Instancio, v6, will be based on Java 17 as the baseline. github.com/instancio/inst…

⚠️ #JUnit #Vintage (JUnit 4 support) will be deprecated in JUnit 6. Yet another reason to upgrade to JUnit #Jupiter! 😎 github.com/junit-team/jun…

Testing Spring Boot controllers is a balancing act! Skip flaky unit tests & slow full-blown tests - learn how AtWebMvcTest enables fast, HTTP-aware testing and boosts your confidence ⚡️. rieckpil.de/how-to-test-sp… #SpringBoot #Testing

@rieckpil Very comprehensive list. Thank you for including Instancio!

It’s Here: the Java Testing Toolbox eBook v1.0 is Now Available! 🧪 The wait is over! 🎉 My new eBook "30 Testing Tools and Libraries Every Java Developer Must Know" (aka. Java Testing Toolbox) has officially launched 🚀 This final release of the Java Testing Toolbox covers 30 essential testing tools, including 9 brand-new chapters on: ✅ Pact – Contract testing for microservices ✅ Awaitility – Fluent async testing ✅ @diffbluehq - AI-powered test generation ✅ @SeleniumHQ – UI testing automation ✅ @archtests – Enforcing architecture rules ✅ @instancio_java – Smart test data generation ✅ JMH – Benchmarking Java code ✅ JfrUnit – Testing with Java Flight Recorder ✅ PIT – Mutation testing for better coverage The other 21 testing tools include: TestNG, Mockito, WireMock, REST Assured, @localstack, @testcontainers, @wiremockorg, @selenide, @junitteam, @GatlingTool, @MockitoJava, JGiven, Spock, Microshed Testing, ApacheBench, GreenMail, MockWebServer, Spock, Hamcrest, AssertJ, JSONAssert, JsonPath, XMLUnit 🧰 Why This eBook is a Must-Have: - Covers both popular and niche Java testing tools - Practical setup guides for Maven & Gradle - Focuses on the 20% of features you’ll use 80% of the time - Beginner-friendly with hands-on examples - Lifetime updates to keep your testing skills sharp 📢 Already got the eBook on Leanpub? You can download the new version for free! Didn’t get notified? DM me If you haven’t grabbed your copy yet, now’s the best time to level up your Java testing skills! rieckpil.de/testing-tools-…

Instancio 5.4.0 is out! This release includes a couple of minor enhancements and some bug fixes. github.com/instancio/inst…

WORKSHOP @ Digit 2025 ✍️ “Smarter testing with Snapshot Testing, Instancio and “Millibenchmarking”” by Kristo Koert, the Technical Lead @ @twilio More about this workshop 👉 digit.dev/workshops/ #digitconf

Instancio 5.3.0 is out! This release introduces a new API for populating already instantiated objects. github.com/instancio/inst…

FYI: We (@JUnitTeam) are planning on #JUnit6 with a @Java 17 baseline, hopefully to be released in the Fall of 2025. 😎 github.com/junit-team/jun…

I released a new version of instancio-fixture-builder. It now includes an annotation processor that autogenerates the AbstractFixtureBuilder implementations, significantly reducing boilerplate code! Details: wouter-bauweraerts.github.io/instancio-fixt… #tdd #instancio #testdata #java #programming

@stefanocodes The biggest reason for AssertJ would be codebase improvements. However, if you continue supporting Java 8 after upgrading, then you will need to backport bug fixes, which adds extra maintenance effort.

@stefanocodes Tough question to answer given how popular AssertJ is. According to new relic's statistics Java 8 is at 28.8% (vs 35.4% for Java 17) in 2024, still a significant number.

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

#SpringBoot 3.4.0 introduced MockMvcTester to simplify MockMvc usage and also supports AssertJ assertions. Looks cool 🚀