facebook/jest
Grade a repo

93

/ 100

GradeA

A top-tier open source project. Docs, tests, and CI are all in excellent shape.

Top 8% of 5,156 graded repos

Delightful JavaScript Testing.

Documentation95
Engineering96
Health83
TypeScript45,457MIT1mo ago

Top fixes

Highest-impact changes first, ranked by point weight

10 to address
  1. 1
    Install and run instructions9pt

    Add a .env.example listing all required environment variables so contributors know what to set up.

  2. 2
    Reproducibility6pt

    Add a Dockerfile, .nvmrc, or .python-version to pin the runtime version and make the environment reproducible.

  3. 3
    Reproducibility6pt

    Add .github/dependabot.yml with at least one package-ecosystem entry so dependencies are updated automatically.

  4. 4
    Dependency manifest6pt

    Add a one-line description to package.json. It appears in npm search and on GitHub.

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Scorecard

Every check, grouped by category and sorted worst-first

Documentation

95

Contributing guide5pt85

Contributing guide is detailed and thorough.

Install and run instructions9pt90

README documents how to install the project.

README12pt100

README is present.

License6pt100

Licensed under MIT.

Engineering

96

Reproducibility6pt70

Lockfile present (yarn.lock). Installs are reproducible.

Tests18pt100

Test files detected (benchmarks/test-file-overhead/0.test.js).

CI/CD14pt100

CI is configured (.github/workflows/check-changelog.yml).

Linting and formatting5pt100

Linter or formatter configured (.editorconfig).

Issue and PR templates6pt100

Issue or PR templates present.

Project health

83

Housekeeping3pt60

.gitignore present.

Dependency manifest6pt65

Dependency manifest found (package.json).

Repository metadata5pt100

Repository has a description.

Activity5pt100

Actively maintained (pushed within the last month).

Repository health signals

Activity, community, and responsiveness at scan time

Activity

  • 11 / 120
    Commits (30d / 90d)
  • 6,665
    Forks
  • 217
    Releaseslatest 10y ago

Community

  • 87% - Good
    Community health
  • 3 bus factor
    authors own >50% of commits
  • 45,457
    Watchers

Responsiveness

  • 3h
    Median issue response
  • 4h
    Median PR merge time
  • 233
    Open issues
Repository files47 root entries
  • .claude
  • .eslintplugin
  • .github
    Good: CI is configured (.github/workflows/check-changelog.yml).
    Good: Issue or PR templates present.
  • .vscode
  • .yarn
  • benchmarks
    Good: Test files detected (benchmarks/test-file-overhead/0.test.js).
  • docs
  • e2e
    Issue: Build artifacts or local files may be committed (e2e/global-setup-node-modules/node_modules/example) (−40 pts).Fix: Remove them and add to .gitignore.
  • examples
  • packages
  • scripts
  • website
  • .claudeignore
  • .codecov.yml
  • .editorconfig
    Good: Linter or formatter configured (.editorconfig).
  • .gitattributes
  • .gitignore
    Good: .gitignore present.
  • .gitpod.yml
  • .prettierignore
  • .watchmanconfig
  • .yarnrc.yml
  • babel.config.js
  • CHANGELOG_PRE_v30.md
  • CHANGELOG.md
  • CLAUDE.md
  • CODE_OF_CONDUCT.md
    Good: Code of conduct present.
  • CONTRIBUTING.md
    Good: Contributing guide is detailed and thorough.
    Issue: Contributing guide lacks a setup section (−12 pts).Fix: Show new contributors how to get a local dev environment running.
    Issue: Contributing guide lacks a code style section (−8 pts).Fix: Describe your linting/formatting rules and how to run them.
    Good: Contributing guide explains how to run tests.
    Good: Contributing guide describes the PR/review workflow.
    Good: Contributing guide includes code examples.
  • crowdin.yaml
  • eslint.config.mjs
  • GOVERNANCE.md
  • jest
  • jest.config.ci.mjs
  • jest.config.mjs
  • jest.config.ts.mjs
  • lerna.json
  • LICENSE
    Good: Licensed under MIT.
  • netlify.toml
  • package.json
    Good: Dependency manifest found (package.json).
  • PROJECT_CHARTER.md
  • README.md
    Good: README is present.
    Good: README is well structured with multiple sections.
    Good: README includes screenshots or visuals. Great for first impressions.
    Good: README has code examples.
    Good: README links to a live demo or deployed app.
    Good: README includes status badges.
    Good: README documents how to install the project.
    Good: README documents how to run the project.
  • SECURITY.md
    Good: Security policy present.
  • tsconfig.json
  • tsconfig.test.json
  • tsconfig.typetest.json
  • tstyche.config.json
  • yarn.config.cjs
  • yarn.lock
    Good: Lockfile present (yarn.lock). Installs are reproducible.
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