🚀 TDD, Where Did It All Go Wrong (Ian Cooper)

Ian Cooper's DevTernity talk revisits Kent Beck's original TDD ideas and shows where misunderstandings crept in. It argues tests should target behaviors through public interfaces rather than implementation details, so suites support refactoring instead of resisting it.

Why HN recommends it: HN repeatedly calls it the best talk on testing, and many say it changed how they approach tests, mocks and the meaning of a unit.

“This excellent talk completely changed the way I approached testing. Every developer who writes tests needs to watch this now!” Read on HN ↗