Testing JavaScript: A Practical Guide to TDD with Jest (2026)

1. 1Install Jest using npm by running 'npm install --save-dev jest'
2. 2Write a test for a JavaScript function using Jest's expect API
3. 3Run the test using 'jest' command to see the test fail
4. 4Implement the function to make the test pass
5. 5Refactor the function to improve code quality while keeping tests passing

Software engineers and developers benefit from this guide to ensure their JavaScript code is reliable and maintainable. Team leads and QA engineers also benefit from understanding TDD principles.

💡 Test-Driven Development with Jest ensures reliable and maintainable JavaScript code

🚀 Boost your JavaScript skills with TDD and Jest! 💻