Refactoring

Data-Driven Testing

Migrating to Data-Driven Testing: How to Refactor an Existing Test Suite

Most teams don't start with data-driven testing — they end up with hundreds of duplicated test functions and decide to refactor. The migration is straightforward if you follow a systematic approach. This guide covers how to identify migration candidates, execute the refactor safely, and manage the resulting test

Approval Testing

Characterization Tests: Safely Refactoring Legacy Code with Golden Masters

There's a specific kind of paralysis that comes with legacy code. You can see the code needs to be refactored — it's a tangle of side effects, global state, and functions that do six things at once. But you can't refactor safely without tests, and