/.babelrc

1 {2   "presets": ["@babel/preset-env","@babel/preset-react"],3   "plugins":[4     "@babel/plugin-proposal-class-properties"5   ]6 }

/jest.config.js

1 module.exports = {2 3 4   "setupFiles": ["./tests/setup.js"],5 6   testEnvironment: "node",7 8   9 };

/package.json

1   "devDependencies": { 2     "babel-core": "7.0.0-bridge.0", 3     "@babel/core": "^7.1.2", 4     "@babel/preset-env": "^7.1.0", 5     "@babel/preset-react": "^7.0.0", 6     "@babel/plugin-proposal-class-properties": "^7.1.0", 7     "@babel/plugin-proposal-object-rest-spread": "^7.0.0", 8     "babel-jest": "^23.6.0", 9     "enzyme": "/home/rudy/.config/yarn/global/node_modules/enzyme",10     "enzyme-adapter-react-16": "/home/rudy/.config/yarn/global/node_modules/enzyme-adapter-react-16",11     "jest": "^23.6.0"12   },13   "scripts": {14     "start": "react-scripts start",15     "build": "react-scripts build",16     "test": "jest",17     "eject": "react-scripts eject"18   },

/tests/setup.js

1 import { configure } from 'enzyme';2 import Adapter from 'enzyme-adapter-react-16';3 configure({ adapter: new Adapter() });