QA Engineer
Testing Strategy That Catches Bugs Before Users Do
Key Takeaway
The Testing skill designs complete test strategies — unit, integration, e2e, contract, and performance tests — with proper coverage targets, test data management, and CI integration. Stop debating "how much testing is enough" and get a concrete plan.
The Problem
Testing strategy conversations in most teams:
- "We should have more tests" → nobody writes them
- "We need 80% coverage" → they test getters/setters to hit the number
- "We need e2e tests" → Cypress tests that take 45 minutes and break constantly
- "Let's do TDD" → abandoned after 2 sprints
- "We test in production" → said ironically (but it's true)
The result: random test distribution. 500 unit tests on utility functions. Zero integration tests on the checkout flow. No contract tests between services. E2e suite that's so flaky nobody trusts it.
The Solution
The Testing skill designs a test strategy based on YOUR architecture, YOUR risk areas, and YOUR team size. Practical, not theoretical. It tells you exactly WHAT to test, at WHICH level, with WHAT priority.
The Process
View details
You: Design a testing strategy for our e-commerce platform:
- Next.js frontend
- Django API
- 3 microservices (payments, shipping, notifications)
- PostgreSQL + Redis
- Team of 8 engineers
- Currently: 200 unit tests, no integration tests, no e2e
The agent produces a pragmatic test strategy:
View details
## Testing Strategy — E-Commerce Platform
### TEST PYRAMID (adapted to YOUR risk profile)
╱╲
╱ E2E ╲ 5 critical paths
╱ (10%) ╲
╱──────────╲
╱ Integration ╲ 30-40 tests
╱ (25%) ╲
╱────────────────╲
╱ Contract Tests ╲ 15 tests (3 services × 5)
╱ (10%) ╲
╱──────────────────────╲
╱ Unit Tests ╲ 500+ tests
╱ (55%) ╲
╱────────────────────────────╲
### PRIORITY ORDER (what to build first)
1. 🔴 INTEGRATION TESTS (you have zero — biggest gap)
Test the flows that make you money:
- User registration → email verification
- Product search → add to cart → checkout → payment
- Order placement → inventory update → shipping creation
- Payment failure → order cancellation → refund
2. 🟠 CONTRACT TESTS (service boundaries)
Your 3 microservices need contract tests:
- API → Payment service: payment intent, charge, refund
- API → Shipping service: rate quote, create shipment
- API → Notification service: send email, send SMS
Tool: Pact.io — consumer-driven contract testing
3. 🟡 E2E TESTS (5 critical paths only)
Don't test everything e2e. Test ONLY:
1. Complete purchase flow (guest + registered)
2. User registration + first purchase
3. Search → filter → product detail → add to cart
4. Account management (password reset, address change)
5. Admin: order fulfillment flow
4. 🟢 UNIT TESTS (expand coverage strategically)
Don't chase coverage numbers. Cover:
- Business logic (pricing calculations, discount rules)
- Data transformations (API response mapping)
- Edge cases (empty cart, out of stock, max quantity)
- NOT: React components with no logic, simple CRUD
The Results
| Metric | "We should test more" | AI-Designed Strategy |
|---|---|---|
| What to test | Everything (paralyzing) | Prioritized by risk |
| Coverage target | "80%" (meaningless) | Meaningful coverage of flows |
| Test stability | Flaky e2e suite | Stable pyramid |
| Bug escape rate | High | Reduced (integration tests) |
| Team adoption | Low (overwhelming) | High (incremental) |
Setup on MrChief
yamlShow code
skills:
- testing
- load-testing # For performance testing layer
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