Node JS Testing Full Course with Jest 2026 | Part 1
⭐▬▬ JOIN ACEDEVHUB COURSE WAITLIST FOR FREE👋 ▬▬⭐
https://acedevhub.com/courses
⭐▬▬ DOWNLOAD SOURCE CODE FOR FREE👋 ▬▬⭐
https://acedevhub.com/projects/node-j...
⭐▬▬▬▬▬▬ TIMESTAMPS 👋 ▬▬▬▬▬▬⭐
00:00 Introduction and demo
02:45 Jest setup in node js and typescript project
13:25 Writing our first test case
31:30 Matchers and edge cases test handling
01:04:05 jest.fn()
01:24:11 jest.mock()
01:37:10 jest.spyOn()
01:58:08 async and promises test cases handling
02:21:23 beforeEach and afterEach in jest
Hi all 👋 In this Node.js Testing Full Course with Jest 2026 (Part 1), you will learn how to set up and write production-ready tests for your Node.js applications using Jest with TypeScript.
This is a practical-first, beginner → intermediate deep dive where we start from absolute basics and gradually move into real-world testing patterns used in backend systems.
In this part, we will focus on unit testing fundamentals, core Jest concepts, mocking, spies, async testing, and proper test structure — everything you need to build confidence in your backend code.
🚀 What You Will Learn in This Part:
🧪 Setting up Jest in a Node.js + TypeScript project
⚙️ Understanding how testing works (practical mindset)
✍️ Writing your first test case
🎯 Matchers and handling edge cases properly
🎭 Mocking functions using jest.fn()
🧩 Mocking modules using jest.mock()
🔍 Spying on real functions using jest.spyOn()
⏳ Testing async code and promises correctly
🔁 Managing test lifecycle using beforeEach and afterEach
👋▬▬▬▬▬▬ BUY ME A COFFEE :) ▬▬▬▬▬▬👋
https://www.buymeacoffee.com/sangammukh6
🔔▬▬▬▬▬▬ Subscribe for more! ▬▬▬▬▬▬🔔
/ @sangammukherjee
👋 ▬▬▬▬▬▬ CONNECT WITH ME ▬▬▬▬▬▬👋
Linkedin : / sangam-mukherjee-400488134
Instagram: / sangam_mukherjee