``` yarn init yarn global add jest yarn add babel-core babel-jest babel-preset-env regenerator-runtime --dev ```
npm install gap-front-prototype``
yarn init
yarn global add jest
yarn add babel-core babel-jest babel-preset-env regenerator-runtime --dev
package.json
`
{
"scripts": {
"test": "npm run jest && npm run eslint",
"jest": "jest",
"eslint": "eslint ."
},
}
``