Competition or Collaboration? Claude Code & Junie

As engineers our job is balancing cost and benefit, risk and reward. Once we had chosen a technology stack and editor, implementing a feature used to be reasonably formulaic - write tests to move the code towards the goal, make them pass, refactor, repeat.

In these exciting AI days we have more decisions to take at virtually every step - Which AI tool is most likely to be my best aid? How do I persuade it? Which model should I ask it to use? Are the answers the same as they were yesterday?

I’m floundering to be honest, but things turned out OK this week with a combination of Junie and Claude Code. I can’t say I planned it that way. I just do what seems expedient in the moment.

* 00:00:42 We had a bug with htmx confirmations
* 00:01:35 I fixed it by hand in the end, with a little advice from Gemini
* 00:02:51 We need to test the HTTP and Browser interfaces
* 00:03:39 Junie implements the HTTP tests
* 00:06:09 It turns out that Junie had been proactive!
* 00:06:39 Now ask Junie for Playwright Tests
* 00:07:40 Junie has cheated!
* 00:09:49 A note from the editor
* 00:10:46 Let's let Claude Code have a go
* 00:12:13 The tests actually edit using the browser
* 00:13:26 IntelliJ bug with quickfix
* 00:15:28 Write a test for cancelling an edit and get Claude to fill in the blanks
* 00:20:11 Some residual issues around htmx interactions
* 00:22:18 I think we're done for the day

Sign up to KTConf Belgium 19 September https://ktconf.be/

There is a playlist of TDD Gilded Rose episodes - https://www.youtube.com/playlist?list=PL1ssMPpyqocg2D_8mgIbcnQGxCPI2_fpA
and one for AI https://www.youtube.com/playlist?list=PL1ssMPpyqociSAO5NlyMEYPL6a9eP5xte
I get lots of questions about the test progress bar. It was written by the inimitable @dmitrykandalov. To use it install his Liveplugin (https://plugins.jetbrains.com/plugin/7282-liveplugin) and then this gist https://gist.github.com/dmcg/1f56ac398ef033c6b62c82824a15894b

If you like this video, you’ll probably like my book Java to Kotlin, A Refactoring Guidebook (http://java-to-kotlin.dev). It's about far more than just the syntax differences between the languages - it shows how to upgrade your thinking to a more functional style.

Видео Competition or Collaboration? Claude Code & Junie канала Pairing with Duncan