Hands-On Introduction To Testing With Jest
 

Understand what testing is and why it's important in software development
Install and configure Jest in JavaScript and TypeScript projects
Write unit tests for functions and modules using Jest
Use Jest matchers and assertions to verify code behaviour
Test asynchronous code including promises and async/await
Work with mocks and spies to isolate code under test
Requirements
Basic JavaScript knowledge including functions, objects, arrays, and ES6 syntax
Familiarity with Node.js and npm
Basic understanding of asynchronous JavaScript (promises and async/await)
Basic TypeScript knowledge is helpful but not required
Description
This hands-on course provides a practical introduction to testing JavaScript and TypeScript applications using Jest, one of the most popular testing frameworks in the JavaScript ecosystem.If you've ever wanted to write reliable tests, catch bugs earlier, and build more confidence in your code, this course is for you.We focus on learning by doing. There are no theory-heavy slides or long explanations. Instead, you'll start writing real tests from the very first lessons and build practical skills that you can immediately use in your own projects.You'll begin by setting up Jest in a project and understanding how the testing workflow works. From there, we'll cover unit testing for functions and modules, working with assertions and matchers, and understanding how to read test results.As the course progresses, you'll learn how to test asynchronous code using promises and async/await, use mocks and spies to isolate dependencies, and write cleaner, more maintainable test suites.We'll also cover testing TypeScript code, handling edge cases, organizing tests properly, and debugging failing tests effectively.Throughout the course, you'll work with practical examples based on real-world coding scenarios, helping you understand not just how to write tests, but why they matter.By the end of this course, you'll feel confident using Jest in your daily workflow and adding automated testing to both small and large projects.This course is a great fit if you are:A beginner developer learning professional coding practicesA JavaScript or TypeScript developer who wants to start testingA backend or frontend developer improving code qualityAnyone who wants to ship more reliable applicationsIf you want a clear, beginner-friendly, and hands-on introduction to testing with Jest, this course is for you.
JavaScript and TypeScript developers who want to learn testing,Frontend and backend developers looking to improve code quality,Anyone who wants to understand how to write and run tests with Jest