react config test env with jest and create-react-app 1

/.babelrc

{
  "presets": ["@babel/preset-env","@babel/preset-react"],
  "plugins":[
    "@babel/plugin-proposal-class-properties"
  ]
}

/jest.config.js

module.exports = {


  "setupFiles": ["./tests/setup.js"],

  testEnvironment: "node",

  
};

/package.json

  "devDependencies": {
    "babel-core": "7.0.0-bridge.0",
    "@babel/core": "^7.1.2",
    "@babel/preset-env": "^7.1.0",
    "@babel/preset-react": "^7.0.0",
    "@babel/plugin-proposal-class-properties": "^7.1.0",
    "@babel/plugin-proposal-object-rest-spread": "^7.0.0",
    "babel-jest": "^23.6.0",
    "enzyme": "/home/rudy/.config/yarn/global/node_modules/enzyme",
    "enzyme-adapter-react-16": "/home/rudy/.config/yarn/global/node_modules/enzyme-adapter-react-16",
    "jest": "^23.6.0"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "jest",
    "eject": "react-scripts eject"
  },

/tests/setup.js

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