reducers2

Test-case reducers are underappreciated debugging tools

Test-case reducers are less well known than they should be, and those who are aware of them don’t always realise the variety of ways we can use – perhaps even abuse! – them. In this post, I’m going to explore some of the things I’ve learnt while using these wonderful tools. I’ll start at the basics, because the idea is so simple that it can be hard to believe it works.