Enzyme.configure({ adapter: new Adapter() }) code example

Example 1: enzyme configure adapter

import { configure } from 'enzyme';
import Adapter from 'enzyme-adapter-react-16';
//dont forget to install 'enzyme-adapter-react-(your React version)' dependency
//In this case 'enzyme-adapter-react-16'

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

Example 2: enzyme-adapter-react-16

step by step how to fix enzyme-adapter-react-16  not support for React version 17


step one : npm i npm-install-peers -g
step two copy this : 
"peerDependencies": {
    "react": "^16.13.1",
    "react-dom": "^16.13.1"
}
step three: typing in your terminal npm-install-peers