test-setup.js

require('raf/polyfill');
var enzyme = require('enzyme');
var Adapter = require('enzyme-adapter-react-16');

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

/**
 * Mock PopperJS
 * 
 * When using mount(), material-ui calls Popper.js, which is not compatible with JSDom
 * And causes UnhandledPromiseRejectionWarning: TypeError: document.createRange is not a function
 * 
 * @see https://github.com/FezVrasta/popper.js/issues/478
 * */
jest.mock(
    'popper.js',
    () =>
        class Popper {
            static placements = [
                'auto',
                'auto-end',
                'auto-start',
                'bottom',
                'bottom-end',
                'bottom-start',
                'left',
                'left-end',
                'left-start',
                'right',
                'right-end',
                'right-start',
                'top',
                'top-end',
                'top-start',
            ];

            constructor() {
                return {
                    destroy: () => {},
                    scheduleUpdate: () => {},
                };
            }
        }
);