testing

name	testing
description	Comprehensive testing patterns and anti-patterns for writing and reviewing tests
context	fork

Testing Skill

Use this skill when writing tests, reviewing test code, or investigating test failures.

Documentation

Read the testing guide and relevant reference based on context:

Context	Primary	Reference
General	docs/testing.md	—
Anti-patterns	docs/testing.md	anti-patterns.md
Patterns	docs/testing.md	patterns.md
CLI (turbo/apps/cli)	docs/testing.md	cli-testing.md
CLI E2E (e2e/tests/)	docs/testing.md	cli-e2e-testing.md
API (turbo/apps/api)	docs/testing.md	api-testing.md
Web (turbo/apps/web)	docs/testing.md	api-testing.md
App (turbo/apps/platform)	docs/testing.md	app-testing.md
Rust (crates/)	docs/testing.md	rust-testing.md
Python addon (crates/runner/mitm-addon)	docs/testing.md	mitm-addon-testing.md

Key Principles

1. Integration tests are primary — test at system entry points
2. Mock at the boundary — only mock external services, not internal code
3. Use real infrastructure — real database, real filesystem (temp dirs)
4. Test behavior, not implementation — verify outcomes, not mock calls