Software engineers have long understood that high-quality code requires comprehensive automated testing. For decades, our industry has relied on deterministic tests with clear pass/fail outcomes to ensure reliability. High-quality software depends on automated testing. That's certainly true at Zed, where we're building a next-generation native IDE in Rust. Zed runs at 120 frames per second, but it would also crash once a second if we didn't maintain and run a comprehensive suite of unit tests on every chang ...