Integration Testing Mastery for SDETs – Bridge the Gap Between Units and Reality (2025 Edition)

Own the middle pyramid layer where most real bugs hide. Learn why integration failures cost 10–20× more than unit bugs, master API ↔ DB ↔ service flows, contract testing (Pact evolution), smart mocking, transaction management, and how to build reliable, fast suites that survive microservices chaos — 2025 SDET standards.