AI-Assisted Unity Testing: How to Verify Generated Code

AI can generate a Unity test fixture in seconds, but speed is not the same as evidence. After 16 years in game development, I have learned that the dangerous bugs are rarely the ones that fail to compile. They are the ones that compile, pass a reassuring test suite, and still violate the player's expectations on a real device. In 2026, coding agents make that false confidence easier to manufacture at scale. My rule is simple: let AI expand the search space, but never let it define correctness.