Testing Patterns and Utilities

When to Use

Use this skill when you need jest testing patterns, factory functions, mocking strategies, and TDD workflow. Use when writing unit tests, creating test factories, or following TDD red-green-refactor cycle.

Testing Philosophy

Test-Driven Development (TDD):

• Write failing test FIRST
• Implement minimal code to pass
• Refactor after green
• Never write production code without a failing test

Behavior-Driven Testing:

• Test behavior, not implementation
• Focus on public APIs and business requirements
• Avoid testing implementation details
• Use descriptive test names that describe behavior