Jest Testing Skill

Master testing Node.js applications with Jest - the delightful JavaScript testing framework.

Quick Start

Test in 3 steps:

1. Install - npm install --save-dev jest supertest
2. Write Test - Create *.test.js files
3. Run - npm test

Core Concepts

Basic Test Structure

// sum.test.js
const sum = require('./sum');

describe('sum function', () => {