react-best-modal/test/setup.js

Simple is best. Accessible out of the box, tiny api, bring your own styles.

const enzyme = require('enzyme');
const Adapter = require('enzyme-adapter-react-16');
const { createSerializer } = require('enzyme-to-json');

enzyme.configure({ adapter: new Adapter() });
expect.addSnapshotSerializer(createSerializer({ mode: 'deep' }));