Yes
I've found Claude Code with Opus 4.5+ to be excellent at generating test cases that exercise the different features, and even push into the edge cases
jng on Hacker News
generate more LOCs of test cases than actual core code
In the thread “We rewrote JSONata with AI in a day, saved $500k/year”, replying to this comment
Helped: Generating test cases and fixing bugs with fuzzy clues.
I've found Claude Code with Opus 4.5+ to be excellent at generating test cases that exercise the different features, and even push into the edge cases. You sometimes need to nudge it into generating more convoluted cases when necessary, but then it is just nudging. …