# Testing Patterns

> Common testing patterns and practices. This skill is designed to be included in composite skills via the 'includes' feature.

- Skill: `dicklesworthstone/testing-patterns` (Agent Skill)
- Install (CLI): `npx skillmds@latest add dicklesworthstone/testing-patterns`
- Raw SKILL.md: https://api.skillmd.com/api/skills/dicklesworthstone/testing-patterns/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: dicklesworthstone (https://skillmd.com/u/dicklesworthstone)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/dicklesworthstone/testing-patterns

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# Testing Patterns

Foundational testing practices applicable across languages and frameworks.

## Rules

- Write tests for happy paths and error cases
- Test edge cases and boundary conditions
- Each test should test one thing
- Tests should be deterministic and repeatable
- Use descriptive test names that explain the scenario

## Checklist

- [ ] Happy path is covered
- [ ] Error cases are tested
- [ ] Edge cases are identified and tested
- [ ] Tests are independent and can run in any order
- [ ] Test data is isolated per test
- [ ] No flaky tests in the suite

## Pitfalls

- Testing implementation details instead of behavior
- Not testing error paths
- Shared mutable state between tests
- Tests that depend on execution order