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Testing

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  1. The Senior Frontend Engineering Blueprint, Part 8: Testing the App Router with Vitest, Playwright and Visual RegressionA green Vitest suite that calls render() on an async Server Component is either a compile error or a false positive. Here is the real testing pyramid for the Next.js App Router — Vitest, MSW v2, mocked Prisma, and a Playwright setup project that logs in once for the whole suite.EngineeringFrontend13 min