Testing Principles

Language-Specific References

For language-specific testing patterns, also read:

• TypeScript (Vitest/RTL/Playwright): references/typescript.md

Core Testing Philosophy

1. Tests are First-Class Code: Maintain test quality equal to production code
2. Fast Feedback: Tests should run quickly and provide immediate feedback
3. Reliability: Tests should be deterministic and reproducible
4. Independence: Each test should run in isolation

TDD Process [MANDATORY for all code changes]

Execute this process for every code change: