by lachlan-miller
Pure functions that receive arguments and return new values (functional core) should handle business logic, while a thin imperative shell manages state mutation and UI integration.
by mario-bittencourt
Business logic belongs in pure functions (functional core) while infrastructure concerns like databases and UIs live in the imperative shell—and the core must never call the shell.
by dave-aronson
Code coverage tells you what code runs—mutation testing tells you if your tests would actually catch bugs by deliberately breaking code and checking whether tests fail.
by simon-de-lang
Code coverage measures what runs, but mutation testing reveals whether your tests actually catch bugs by deliberately breaking code and checking if tests fail.
by paul-hammond
Code coverage lies about test quality—mutation testing exposes weak tests by asking 'if I introduced a bug here, would my tests catch it?'
by nuxt
Real-time accessibility auditing inside Nuxt DevTools catches WCAG violations during development rather than after deployment.
by vladimir-sheremet
Vitest 3 standardized APIs and improved browser mode; Vitest 4 rewrites mocking, adds visual regression testing, Playwright traces, and VS Code debugging.
by mohammad-bagher-abiyat
Vitest Browser Mode runs tests in real browsers instead of jsdom simulations, eliminating false positives from Node.js APIs leaking into the test environment.
by jessica-sachs
Vitest browser mode runs component tests in real browsers instead of JSDOM, providing actual rendering confidence while maintaining Vitest's speed and developer experience.
by mark-winteringham
Practical guide to using generative AI for test design, synthetic data generation, and automation without the hype.
by michael-thiessen
Mike Cohn's 2009 testing pyramid no longer fits modern web development—teams should design their own testing strategy based on tooling, architecture, and risk tolerance.
by tsvetan-tsvetanov
Quality foundations—testing, strict types, clean APIs—enable rapid AI-assisted development because features emerge naturally once verification loops exist.
by kent-c-dodds
Prioritize integration tests over unit tests for maximum confidence with minimal maintenance burden—aim for ~70% coverage, not 100%.
A comprehensive guide to building maintainable, scalable Vue 3 applications
by alexander-opalic
A practical testing strategy for Vue 3 that inverts the traditional pyramid—prioritizing integration tests (~70%) over unit tests, using Vitest browser mode for real browser execution and 4x faster performance than JSDOM.
by kent-c-dodds
Nested describe blocks with beforeEach hooks create cognitive burden by requiring developers to track mutable state across scope levels—prefer inline setup or factory functions instead.