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

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: trivial getters/setters, framework code, one-off scripts. Output Produce a test plan with: what to test, test type for each area, coverage targets, and example test cases. Identify gaps in existing coverage.