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What is the default test framework for ReactJS?

By using Create-React-App to scaffolding a new project, it will include default App.test.js with below content:

Create-React-App

App.test.js

import React from 'react';
import ReactDOM from 'react-dom';
import App from './App';

it('renders without crashing', () => {
const div = document.createElement('div');
ReactDOM.render(<App />, div);

//expect(div.innerHTML).toContain('Hi There!');

ReactDOM.unmountComponentAtNode(div);
});


I've tried to run command yarn test, below is the response i got

yarn test

Error: Cannot find module '/Users/isaaclem/Code/ReactJS/testing/node_modules/jest-cli'

And if I try npm run test instead, I'm hitting same error too, which saying couldnt find jest-cli. Is there any reason where C-R-A gives us a default test file but not including the necessary framework/module?

npm run test

jest-cli

C-R-A

Below is the default package.json:

package.json

{
"name": "testing",
"version": "0.1.0",
"private": true,
"dependencies": {
"react": "^16.4.1",
"react-dom": "^16.4.1",
"react-router-dom": "^4.3.1",
"react-scripts": "1.1.4"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test --env=jsdom",
"eject": "react-scripts eject"
}
}


UPDATES:

I've then execute the command npm install --save jest-cli to install the missing dependencies and try running the test again and hitting the below error instead:

npm install --save jest-cli

Determining test suites to run...
--watch is not supported without git/hg, please use --watchAll
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! testing@0.1.0 test: `react-scripts test --env=jsdom`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the testing@0.1.0 test script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.


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