Cannot find module 'enzyme' from 'setupTests.ts' - reactjs

Question

I want to use enzyme to perform unit tests in my React project with TypeScript.
I used documentation on adding tests to create-react-app - runnning tests
I created a setupTests.ts file in /src
setupTests.ts
import { configure } from 'enzyme';
import Adapter from 'enzyme-adapter-react-16';
configure({ adapter: new Adapter() });
And I wrote a test
App.test.ts
import React from 'react';
import { shallow } from 'enzyme';
import App from './App';
it('renders without crashing', () => {
shallow(<App />);
});
A test using react-dom works fine if I comment the line which configures adapter in setupTests.ts
setupTests.ts
import { configure } from 'enzyme';
import Adapter from 'enzyme-adapter-react-16';
// configure({ adapter: new Adapter() });
App.test.ts
import React from 'react';
import ReactDOM from 'react-dom';
import App from './components/Dashboard';
it('renders without crashing', () => {
const div = document.createElement('div');
ReactDOM.render(<App />, div);
});
package.json
{
"name": "sampleapp",
"version": "0.1.0",
"private": true,
"dependencies": {
"#material-ui/core": "^3.9.2",
"#material-ui/icons": "^3.0.2",
"#types/enzyme": "^3.9.1",
"#types/enzyme-adapter-react-16": "^1.0.5",
"#types/enzyme-to-json": "^1.5.3",
"#types/jest": "24.0.11",
"#types/node": "11.12.0",
"#types/react": "16.8.8",
"#types/react-dom": "16.8.3",
"#types/react-redux": "^7.0.5",
"#types/react-router-dom": "^4.3.1",
"#types/redux-thunk": "^2.1.0",
"axios": "^0.18.0",
"react": "^16.8.5",
"react-dom": "^16.8.5",
"react-redux": "^6.0.1",
"react-router-dom": "^5.0.0",
"react-scripts": "2.1.8",
"redux": "^4.0.1",
"redux-thunk": "^2.3.0",
"typescript": "3.3.4000"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject"
},
"eslintConfig": {
"extends": "react-app"
},
"browserslist": [
">0.2%",
"not dead",
"not ie <= 11",
"not op_mini all"
]
}
The test is supposed to run successfully. But it is failing and giving me an error
Cannot find module 'enzyme' from 'setupTests.ts'

Answer 1

You should do yarn add enzyme and you'll be good!
Or npm i enzyme if you're using npm.
#types/enzyme is used to get typescript interfaces but not the actual enzyme package!