The three laws of Test-Driven Development are stated as follows: 1. You are not allowed to write any production code unless it is to make a failing unit test pass. 2. You are not allowed to write any more of a unit test than is sufficient to fail; and […] [Original post on mastodon.social]

Today I am stepping down from my role as the CEO of #mastodon. Though this has been in the works for a while, I can't say I've fully processed how I feel about it. There is a bittersweet part to it, and I think I will miss it, but it also felt necessary. It feels like a goodbye, but it isn't—I […]

There are basically three ways to verify the outcome of a test: - Verify the state of the Subject Under Test. - Verify the return value of a method or function. - Verify a value passed to a collaborator of the Subject Under Test. That's it! Those are the […] [Original post on mastodon.social]

Current view #shertogenbosch

This Friday November 7, I'll be hosting my workshop "Testing Done Right" together with the Software Captains Academy. Are you interested to learn more about how to build quality software? Join me in this workshop were we're going to dive into the following […] [Original post on mastodon.social]

On 4 𝐚𝐧𝐝 5 𝐃𝐞𝐜𝐞𝐦𝐛𝐞𝐫 2025, I’ll be hosting my workshop 𝐖𝐞𝐥𝐥-𝐁𝐚𝐥𝐚𝐧𝐜𝐞𝐝 𝐓𝐞𝐬𝐭-𝐃𝐫𝐢𝐯𝐞𝐧 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 at the 𝐁𝐫𝐚𝐢𝐧 𝐄𝐦𝐛𝐚𝐬𝐬𝐲 𝐢𝐧 𝐀𝐧𝐭𝐰𝐞𝐫𝐩. ⏰ The early bird discount expires this Friday, 31/10! So don’t wait if you want to master the art of writing loosely coupled and […] [Original post on mastodon.social]

"Jij bent de testindustrie" #stardeveloper

Last weekend, I had the privilege of attending SoCraTes Crete 2025 for the second time. It’s always inspiring to learn alongside the incredible people in this welcoming, diverse community. Huge thanks to the organisers for their hard work in making this […] [Original post on mastodon.social]

Current view #socratescrete

Sliding into the final day of @socrates_crete 2025. #socratescrete

Kicking of the second day of @socrates_crete #fomoisreal #socratescrete

Ready for the first day at #socratescrete

Arrived at #socratescrete

It seems it’s going to be a private flight to #socratescrete

With some delay, finally on my way to #socratescrete

A while back, I was reading the Farnam Street Blog when I came across the following paragraph: “𝐖𝐡𝐞𝐧 𝐦𝐢𝐬𝐭𝐚𝐤𝐞𝐬 𝐚𝐫𝐞 𝐜𝐡𝐞𝐚𝐩, 𝐲𝐨𝐮 𝐜𝐚𝐧 𝐦𝐨𝐯𝐞 𝐟𝐚𝐬𝐭 𝐚𝐧𝐝 𝐟𝐢𝐱 𝐰𝐡𝐚𝐭 𝐝𝐨𝐞𝐬𝐧’𝐭 𝐰𝐨𝐫𝐤. 𝐖𝐡𝐞𝐧 𝐦𝐢𝐬𝐭𝐚𝐤𝐞𝐬 𝐚𝐫𝐞 𝐞𝐱𝐩𝐞𝐧𝐬𝐢𝐯𝐞, 𝐲𝐨𝐮 𝐨𝐯𝐞𝐫𝐭𝐡𝐢𝐧𝐤 𝐞𝐯𝐞𝐫𝐲𝐭𝐡𝐢𝐧𝐠 𝐚𝐧𝐝 𝐬𝐭𝐢𝐥𝐥 𝐜𝐡𝐨𝐨𝐬𝐞 𝐰𝐫𝐨𝐧𝐠.” It got me thinking. For me, this is the core […]

Current view

I just posted a a brand new retro house mix for those who enjoy listening to those old grooves. https://soundcloud.com/dj-jakke/attic-jam-sessions-085-retro #retrohouse #housemusic

Last weekend, I attended the #socratesbe 2025 unconference. Open space retreats like SoCraTes BE means lots of learning, amazing conversations and a great deal of fun. Thanks to the organisers, the hosts and the attendees to make it a wonderful experience […] [Original post on mastodon.social]

I'm only half-way through the book, but I can already state that for me "The Arrogant Ape" by Christine Webb is by far the best book I've read this year. Exceptionally well-written and researched, it is my hope that future generations will look back at the […] [Original post on mastodon.social]

“I’m writing unit tests because I have to. They just confirm that my code works, which I already know. They are tedious to write, and often stop working when I change the implementation of the system. Maintaining unit tests is often difficult and takes a lot of time out of my day.” Does this […]

Software developers using traditional methods start out by first writing the code. Only when the work has already been completed do they shift their focus to testing. (1/2) #tdd #testdrivendevelopment #unittests #unittesting #softwaredesign

Winner of the Fauna pic of the year, this picture illustrates the increasing conservation crisis. The fragmentation and/or destruction of their habitats is threatening most species even in countries usually hailed as winners in that department (Costa Rica […] [Original post on mastodon.social]

Finally found some time to make a new mix of the latest house music. https://soundcloud.com/dj-jakke/attic-jam-sessions-084 #dj #djset #housemusic

When naming tests, avoid using technical names of functions/classes. When we encorporate the name of a function into the descriptive name of a test method, and the respective function is later renamed, then the description of the test becomes completely […] [Original post on mastodon.social]

that's just too easy...

If you're using LinkedIn and you're in Europe, you definitely want to prevent Microsoft using your data for training whatever crappy AI they are cooking. Just say no! #ai #linkedin #eu https://www.linkedin.com/mypreferences/d/settings/data-for-ai-improvement

Today’s views

When doing Test-Driven Development, we use “tests” as a way to exercise the design of production code before it exists. As such, we can see the choices we make in action before we decide to build further upon it. At this point, it’s not so much about “testing” but more about “designing”. (1/2) […]

Current view

Today’s views #rhodos

Valley of butterflies #rhodos

Acropolis of Lindos #rhodos

Current view #rhodos

Assertion libraries can be considered as mini-DSL’s that make automated tests more readable. When a team of devs make their choice, they usually judge on API preference. While it’s very important to have readable tests, the API should never be the deciding […] [Original post on mastodon.social]

The best thing about TDD is not necessarily the tests thats we write, but rather the instant feedback that we get from the decisions that we make during coding sessions. Especially when those decisions are related to the design of the system that we're […] [Original post on mastodon.social]

Reflecting on 25 years as a software developer—a milestone I reached last July—I’m struck by how much the industry has evolved. I’ve seen hypes rise and fall, technologies come and go. However, there’s one thing has remained a constant: the value of Extreme Programming. I’ve been fortunate […]

In a 2.4 °C world, l, as a 47-year-old from Europe & Central Asia, will experience these increases. https://myclimatefuture.info #climatechange #climate

Don't ride elephants. Boycott circus. Elephants are sentient highly intelligent beings. Don't participate in this. https://idausa.org/campaign/elephants/latest-news/circus-elephant-keeper-interview-max-brandrett-chipperfields/

"Economische belangen halen het op volksgezondheid. Of dat is toch vaak de conclusie wanneer de zaken voor een rechtbank komen." #volksgezondheid https://mastodon.online/@apache_be/115139205174597983

Test doubles expose design flaws in the code. Developers usually tend to respond to the pain that this induces by blaming test doubles instead of interpreting these signals as an issue with the design. If solitary tests are amplifiers for design flaws, then […] [Original post on mastodon.social]

Small, fast-running tests quickly expose design flaws in the code. Developers usually tend to respond to the pain that this induces by blaming the tests instead of interpreting these signals as an issue with the design. Solitary tests are amplifiers for […] [Original post on mastodon.social]

Beste media, kunnen we volgende september aub niet meer meegaan in de nutteloze opinie-oorlog over fietshelmplicht of godbetert fluohesjes, maar wijzen op het systematisch falen van alle overheden in het voorzien van een veilige infrastructuur en het totale ontbreken van handhaving. Dank!

In his book "Test-Driven Development By Example", Kent Beck describes the "no time for testing" death spiral. The more stress you feel, the less testing happens. The less testing happens, the more errors will occur. The more errors you make, the more stress […] [Original post on mastodon.social]

I wish I had known in my 20s that selling science fiction to venture capitalists was way more profitable than selling it to publishers of science fiction