jestjs/jest
Delightful JavaScript Testing. observed · 2026-08-28
Health v2 · maintenance only
94/100
- Activity 99
- Release rhythm 83
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: 6
- age_days: 4650
- days_rel: 117
- days_push: 8
- n_releases_24m: 12
Adoption not part of the score
45474 stars · 6731 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
Jest is a comprehensive JavaScript testing framework with a focus on simplicity, working out of the box with Babel, TypeScript, Node, React, Angular, and Vue projects. It bundles a test runner, assertion library, mocking system, snapshot testing, and code coverage into a single zero-config package.
Use cases
- write unit tests for javascript code
- test a react application
- snapshot test large objects
- mock imported modules in tests
- generate code coverage reports
- run tests in watch mode while developing
- test typescript code without extra setup
When to choose
- you want a batteries-included, zero-config test runner for a JavaScript or TypeScript project
- you need snapshot testing, mocking, and coverage without assembling separate tools
- you work with React, Angular, Vue, or Node and want first-class framework integration
When to avoid
- you need browser-based end-to-end testing (use Playwright or Cypress)
- you prefer a lightweight, fast native ESM runner like Vitest for a Vite-based project
- your project is not JavaScript/TypeScript
Facets
framework · maturity stable
testing e2e-testing mocking cli developer-tools testing developer-tools web-development frontend cli cross-platform snapshot-testing code-coverage test-runner zero-config watch-mode unit-testing mock-functions typescript-support javascript nodejs
10 sources
- readme: https://github.com/jestjs/jest · fetched 2026-08-28 · a31a7132747f
- homepage: https://jestjs.io · fetched 2026-08-29 · c7d1e9a262bb
- site_page: https://jestjs.io/docs/getting-started · fetched 2026-08-29 · a21ba0f9bc8c
- site_page: https://jestjs.io/docs/next/getting-started · fetched 2026-08-29 · ce80d2c2ecfd
- site_page: https://jestjs.io/docs/30.4/getting-started · fetched 2026-08-29 · 3d70c7a9503d
- site_page: https://jestjs.io/docs/30.0/getting-started · fetched 2026-08-29 · 96942b39079f
- site_page: https://jestjs.io/docs/29.7/getting-started · fetched 2026-08-29 · b49274ff6f93
- site_page: https://archive.jestjs.io/docs/en/24.x/getting-started.html · fetched 2026-08-29 · 5994a0ece400
- site_page: https://archive.jestjs.io/docs/en/23.x/getting-started.html · fetched 2026-08-29 · dd62c02599d9
- site_page: https://archive.jestjs.io/docs/en/22.x/getting-started.html · fetched 2026-08-29 · a976f8e5d632
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| jestjs/jest | main | 94 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem