Testing Strategy

Design effective testing strategies balancing coverage, speed, and maintenance.

Testing Pyramid

        /  E2E  \         Few, slow, high confidence
       / Integration \     Some, medium speed
      /    Unit Tests  \   Many, fast, focused

API endpoints: Unit tests for business logic, integration tests for HTTP layer, contract tests for consumers
Data pipelines: Input validation, transformation correctness, idempotency tests
Frontend: Component tests, interaction tests, visual regression, accessibility
Infrastructure: Smoke tests, chaos engineering, load tests

Focus on: business-critical paths, error handling, edge cases, security boundaries, data integrity.

Skip: trivial getters/setters, framework code, one-off scripts.

Produce a test plan with: what to test, test type for each area, coverage targets, and example test cases. Identify gaps in existing coverage.