I made a simple tool for testing Ink/Inky stories: Simple Ink Tester by oxfordgirls
It’s still work-in-progress, so consider this a very early preview.
You basically export your story from Inky as a “.js” file, import it into the tool, then the tool clicks choices at random until it runs into an error (or not, if your story is flawless).
I only tested it on small example stories, unfortunately, because I didn’t have any huge Ink stories, so I don’t know how feasible it is for real-life use. But it already found a bug in Ink’s emoji story example.