Jest + React Testing Library Best Practices

Overview

Based on Testing Library's core principles and Kent C. Dodds' best practices guidance for writing user-centric tests.

Core Principle: Tests should interact with your application the same way users do, not test implementation details.

🔴 MANDATORY PRE-CHECK

Before writing any test, you MUST:

1. ✅ Check if project has AGENTS.md and read its Testing section
2. ✅ Follow AGENTS.md rules with highest priority when they exist
3. ✅ Use this skill's principles as baseline guidance and supplementary best practices

When to Use