Node.js Express test-driven development with Jest

Test-driven development (TDD) is a prevalent programming methodology in the workplace, often mandated for specific projects, and is relatively straightforward once its fundamental principles are grasped. This text explores using the new Node.js test runner and the Jest testing library for backend testing in JavaScript. It begins with a guide on setting up a Node.js project for testing, providing sample code and instructions to run tests using the inbuilt Node.js test runner, which has been stable since version 18 but remains experimental. It also delves into using Jest for testing backend endpoints, offering a similar project setup and test execution framework. The text highlights Jest 28's new features, including sharding, which allows splitting test suites for more efficient testing. Additionally, it introduces LogRocket, a tool for monitoring and improving digital experiences, and emphasizes the importance of backend testing to ensure the reliability and quality of software applications.