Testing

Prologue: 1,754 Perfect Green Lights The team watched the test panel late on the night Aristotle v1.6.0 shipped. Green indicators lit up like dominoes. Python side: 1,166 assertions. TypeScript side: 588 checks. Total: 1,754 automated checks. All green. In code terms, that’s like having cameras and infrared sensors on every wall. A fly couldn’t sneak through without setting off alarms. The team leaned back. The system looked like an iron fortress. ...

This is the first article in the series “Taming AI Coding Agents with TDD.” The series has one thesis: AI-assisted development demands stricter process discipline than traditional development, and here is exactly how to enforce it at every step. The series follows the pipeline order: requirements, design, testing, review, implementation. This article starts at the testing layer. During Aristotle’s third refactoring, the test plan document was where I learned the hardest lesson. I’ll cover this layer first, then work backward and forward in subsequent posts. ...