Individual skill

javascript-testing-patterns

Guides expert-level JavaScript and TypeScript testing: Vitest vs Jest decision tree, ESM mocking strategies, snapshot testing, coverage configuration, and test runner selection for modern projects. Use when the user asks about JavaScript testing, Vitest, Jest, mocking ESM, snapshot testing, coverage, test runner selection, TypeScript testing. Do NOT use when the user asks about Node.js project setup (use `nodejs-project-setup`), general testing concepts (use `unit-testing-patterns`), E2E testing (use `e2e-testing-patterns`).

src/process/resources/skills-library/bodies/skills/software-engineering/javascript-testing-patterns/SKILL.md

Source commit 4c030c7b01c241df7b6e3535635a970f10d781af

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Observed behavior

Instructions only

Last checked

Nov 10, 2026

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