pokemon.trade/test/javascript/setup.js

import Enzyme from 'enzyme';
import Adapter from 'enzyme-adapter-react-16';
import chai from 'chai';
import chaiEnzyme from 'chai-enzyme';
import {shallow, render, mount} from 'enzyme';

Enzyme.configure({adapter: new Adapter()});
chai.use(chaiEnzyme());

global.shallow = shallow;
global.render = render;
global.mount = mount;
global.jestExpect = global.expect;
global.chaiExpect = chai.expect;