In twenty years in game development I have never worked on a game which had real unit tests or even integration tests.

I’ve seen engines which used them, but not games. The rationale was that it was just too hard, which always felt like a cop-out to me.

I would dearly love to have more automated tests in the game I’m working on now, but I’ve never seen a model of it working well which I could copy, and part of me suspects that it’d be a huge investment of time to figure it out entirely on my own when I’m already vastly overworked as it is.

If anybody has references to indepth case studies of making game engines more friendly toward automated tests, I’d be super interested to see whether there were lessons I could apply toward my own situation!