@momentum-ui/react-collaboration/src/helpers/enzyme_setup.js

Cisco Momentum UI Framework for React Collaboration Applications

// import polyfill for element internals - needed when testing web components with attachInternals
import 'element-internals-polyfill';

import Enzyme from 'enzyme';
import Adapter from 'enzyme-adapter-react-16';

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