jest => documentation

Quiz with Jest (JavaScript framework)

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JS Playground

JSPlayground

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Global install

npm i --save-dev jest babel-jest @babel/core @babel/preset-env
npm i -g jest

jest quiz/reversestring/test.js --watch

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Local install

npm i jest babel-jest @babel/core @babel/preset-env
npm i jest

import {expect, test} from "@jest/globals";
import reverse from "./index";

test('Reverse function exists', () => {
    expect(reverse).toBeDefined();
});

test('Reverse reverses a string', () => {
    expect(reverse('abcd')).toEqual('dcba');
});

upgrading the vulnerable packages and running

npm audit fix --force

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origin