Testing Strategy Design effective testing strategies balancing coverage, speed, and maintenance. Testing Pyramid Strategy by Component Type - 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 What to Cover Focus on: business-critical paths, error handling, edge cases, security boundaries, data integrity. Skip:…