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Original rewrites on React, Node.js, TypeScript and AI — practical notes from the same engineering practice behind our operator software. Article bodies are in English.
Tagged: jest
JavaScript unit testing with Jest and Vitest: practices that stick
Fast isolated tests, what belongs on the unit layer, Vitest vs Jest vs Mocha, AAA, mocks, edge cases, CI, and where AI helps.
1573 wordsRead articleShortening Jest Runs Locally and in CI: Workers, Caching and Scope
A practical checklist for faster Jest suites: measuring first, tuning workers, trimming global setup, reusing the cache, isolatedModules, and running only affected tests.
956 wordsRead articleA Production-Ready React Baseline: What Every Package Actually Does
Set up Vite, Tailwind v4, Redux Toolkit, React Router, Jest and Prettier for a React app, and understand why each package and config line is there.
3165 wordsRead articleReplacing Jest with Node's Native Test Runner in Node 24
A real-world migration shows how Node 24's built-in test runner and native TypeScript support cut CI time while removing four dependencies.
1852 wordsRead article
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