I've added syntax highlighting to the prompt of my programming language!

It's not strictly necessary, but it's nice to have. It caught a bug with lexing incomplete string literals too.

I'm still experimenting with UIs for live (sandboxed) evaluation of tests. I've realised that you really want to highlight the failing assertion, not just the failing test.

Feedback welcome :)

I'm experimenting with live-evaluating tests in my programming language project.

It's relatively fiddly to hook up a UI for this, but it saves a precious keystroke to run the tests! I'm hoping that it results in more, better tests due to the convenience.