import React from 'react' ; import ReactDOM from 'react-dom' ; import { MemoryRouter } from 'react-router-dom' ; import App from './App' ; it ( 'renders without crashing' , async ( ) => { const div = document . createElement ( 'div' ) ; ReactDOM . render ( < MemoryRouter > < App /> < /MemoryRouter>, div); await new Promise ( resolve => setTimeout ( resolve , 1000 ) ) ; } ) ;