lerna-jest

Oversimplify jest configuration for common use cases.

Install

npm install -d jest lerna-jest

Configure

1. Create file jest.config.js in your lerna root.

const { guessRootConfig } = require('lerna-jest')
module.exports = guessRootConfig(__dirname)

2. Configure test script in lerna root package.json.

{
  "scripts": {
    "test": "jest"
  }
}

If you fit the common use cases = you've got some tests and a linter, then you're done for all of your projects. Now you can just use common npm interface to run tests.

npm test -- --watch

Magic setup files

Create these files on the lerna root level or inside the project and they will be automatically used to configure jest environment:

• jest.setup.js goes in setupFiles.
• jest.afterEnv.js goes in setupFilesAfterEnv

Magic plugins

Some plugins are automatically recognized, you only need to install them:

• jest-date-mock
• jest-enzyme
• jest-extended
• jest-runner-eslint
• jest-runner-standard
• jest-watch-select-projects
• jest-watch-typeahead