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acdl/skills/testing.md
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Jon Chery 2c08c778a9 docs(P4): Atelier skills mapping — 9 skill files + index + BA.A extension (REQ-221, REQ-222)
REQ-221: skills/ directory with 9 Atelier-derived skill files mapped to the
BA.A citizen-developer catalog: api, security, data, testing, observability,
errors, devops, infrastructure-as-code, compliance. Each names the Atelier
source path, distills first-principles to the citizen-dev-relevant subset,
links to agent-checklist triggers, maps to BA.A 5-skill catalog.

REQ-222: docs/skills.md index (9-skill table, Atelier provenance, 8 core
principles C1-C8, consumption instructions, reference-only domains, excluded
domains). PROJECT.md BA.A decision extended with the Atelier-derived skill
catalog reference.

---ci---
project: acdl
phase: 4
milestone: v1.18
status: execute
requirements:
  covered: [REQ-221, REQ-222]
  partial: []
---/ci---
2026-08-06 15:11:12 +00:00

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Markdown

# Skill: Testing
> **Atelier source:** `domains/testing/` (first-principles + pyramid,
> fixtures)
> **Core principles:** C1 Correctness, C5 Reversibility
> **BA.A mapping:** UAT is the citizen developer's RACI responsibility
> **Consumer:** read this before submitting for UAT.
## First Principles (citizen-developer-relevant subset)
- **Tests are independent.** Order doesn't matter; one test's setup
doesn't break another's.
- **Tests are deterministic.** No `Date.now()`, no `random()`, no
network calls in unit tests.
- **Edge cases are covered.** Empty, single, max, invalid — not just
the happy path.
- **A failing test names the problem.** The assertion message explains
what failed and why, not just "assertion failed".
- **The pyramid: unit → integration → e2e.** Most tests are unit; few
are e2e; the middle is integration. Don't invert the pyramid.
## Agent-Checklist Triggers (§ Testing)
- Tests are independent (order doesn't matter)
- Tests are deterministic (no `Date.now()`, no `random()`)
- Edge cases are covered (empty, single, max, invalid)
- A failing test names the problem specifically
## How Nova Uses This
Per the RACI matrix (`docs/raci.md`), the **Citizen Developer is
Responsible for User Acceptance Testing (UAT)**. The platform provides
the QA checks (policy, confidence, schema); you provide the UAT. The
testing skill ensures your UAT meets production-grade standards. The
W3.E per-env mandatory table requires `validation.e2eSuite` +
`validation.loadTest` for `qa` environment submissions — the
submission-readiness gate enforces this.