AI Engineer YouTube · May 16, 2026

Beyond Code Coverage: Functionality Testing with Playwright — Marlene Mhangami, Microsoft

Beyond Code Coverage: Functionality Testing with Playwright — Marlene Mhangami, Microsoft video thumbnail
Why it matters

When an LLM writes your tests, it tends to write tests that confirm what the code does rather than tests that verify what the user experiences. Your test suite goes green. The app still breaks in ways none of those tests would catch. Marlene Mhangami from Microsoft makes the case for flipping the order: get the agent t

My takeaway: When an LLM writes your tests, it tends to write tests that confirm what the code does rather than tests that verify what the user experiences. Your test suite goes green. The app still breaks in ways none of those tests would catch. Marlene Mhangami from Microsoft makes the case for flipping the order: get the agent t