Rails Minitest Expert

Write performant, maintainable, and non-brittle tests for Rails applications using Minitest and fixtures.

Philosophy

Core Principles:

1. Test behavior, not implementation - Focus on WHAT code does, not HOW
2. Fast feedback loops - Prefer unit tests over integration tests, fixtures over factories
3. Tests as documentation - Test names should describe expected behavior
4. Minimal test data - Create only what's necessary; 2 records == many records
5. Non-brittle assertions - Test outcomes, not exact values that may change