Testing Knowledge Base

Quick reference for PHP testing patterns, principles, and best practices.

Testing Pyramid

        /\
       /  \     Functional (10%)
      /────\    - E2E, browser tests
     /      \   - Slow, fragile
    /────────\  Integration (20%)
   /          \ - DB, HTTP, queues
  /────────────\Unit (70%)
 /              \- Fast, isolated
/________________\- Business logic

Rule: 70% unit, 20% integration, 10% functional. Invert the pyramid = slow, brittle test suite.