Testing strategies and methodologies including TDD, E2E testing, and multi-framework support.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Testing Skill
Comprehensive testing guidance covering:
- **TDD Workflow**: Red → Green → Refactor cycle with practical examples
- **Test Organization**: Unit / Integration / E2E test structure
- **Framework Support**: pytest, Jest, JUnit5, xUnit, Google Test
- **Mock Strategies**: Only mock external boundaries, not internal logic
- **Coverage Requirements**: 80%+ with meaningful assertions
## When Loaded
This skill is automatically injected when working with:
- `/cc-best:dev` — Implementation with tests
- `tdd-guide` agent — Test-driven development guidance
- `build-error-resolver` agent — Fixing test failures
## Key Rules
1. **Tests first** — Write failing test before implementation
2. **AAA pattern** — Arrange, Act, Assert in every test
3. **No shared mutable state** — Each test is independent
4. **Descriptive names** — `test_<feature>_<scenario>_<expected>`
The line at the top of this page pins the label git:20260307.6b5172a, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
GET https://markdownregistry.com/api/v1/artifacts/art_xrvwvnjhmgh4nj4u
GET https://markdownregistry.com/api/v1/resolve?ref=davepoon/buildwithclaude/testing
GET https://markdownregistry.com/api/v1/blob/f41edd3e9a7ff6cc6c52970c5a111c86ff8991311ce8bb2462b0fb582c0488c6
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