Instancio

[Instancio @instancio_java]

Instancio 5.6.0 is out! This release contains bug fixes and deprecations to ease migration to the upcoming 6.0.0 release. https://t.co/mBwdY0itJ4

[Instancio @instancio_java]

Instancio 6.0.0-RC3 is out! This release adds support for Protocol Buffers via the new instancio-protobuf module. It also contains a few breaking changes.

https://t.co/apYqmt10Bw

[Instancio @instancio_java]

Instancio 6.0.0-RC2 is out! This release includes improved Kotlin support through the new instancio-kotlin dependency. Any feedback would be appreciated! https://t.co/fFAdtrfDqD

[Instancio @instancio_java]

We're looking to improve Instancio's API for Kotlin users and would love your input! If you use Kotlin, please share your feedback: https://t.co/yW1YRtcpot

[Instancio @instancio_java]

A big thank you to our new sponsor @cybozu!❤️
https://t.co/fuPlVUBObF

[Rod Johnson @springrod]

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

[Stefano Cordio @stefanocodes]

🤔 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! 👇

https://t.co/TZL81pqOK6

[Philip Riecks @rieckpil]

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!

https://t.co/k6qCMcTvjM

[Paul Graham @paulg]

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 @instancio_java]

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.

https://t.co/cpqIZsvTWf

[Sam Brannen @sam_brannen]

⚠️ #JUnit #Vintage (JUnit 4 support) will be deprecated in JUnit 6.

Yet another reason to upgrade to JUnit #Jupiter! 😎

https://t.co/iP8AlfvFVm

[Philip Riecks @rieckpil]

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 ⚡️.

https://t.co/0qSc7vReUm

#SpringBoot #Testing

[Instancio @instancio_java]

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

[Philip Riecks @rieckpil]

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!

https://t.co/X3q49rWIXl

[Instancio @instancio_java]

Instancio 5.4.0 is out! This release includes a couple of minor enhancements and some bug fixes.

https://t.co/H9FQuSF1ss

[Digit Conference @digitconf]

WORKSHOP @ Digit 2025 ✍️

“Smarter testing with Snapshot Testing, Instancio and “Millibenchmarking”” by Kristo Koert, the Technical Lead @ @twilio

More about this workshop 👉 https://t.co/hfi7jFV4ZO

#digitconf

[Instancio @instancio_java]

Instancio 5.3.0 is out!

This release introduces a new API for populating already instantiated objects.

https://t.co/0FCHwTkmSv

[Sam Brannen @sam_brannen]

FYI: We (@JUnitTeam) are planning on #JUnit6 with a @Java 17 baseline, hopefully to be released in the Fall of 2025. 😎

https://t.co/VebUn4y5Pe

[Wouter Bauweraerts @wbauweraerts]

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: https://t.co/Fg02wUnE6g

#tdd #instancio #testdata #java #programming

[Instancio @instancio_java]

@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.

[Instancio @instancio_java]

@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.