Exploring the Node.js native test runner

The Node.js native test runner, introduced as an experimental feature in version 18 and fully integrated in version 20, offers a robust toolset for testing in JavaScript applications, particularly in the Node.js ecosystem. This tutorial outlines its capabilities, emphasizing features such as mocks, spies, and stubs, which facilitate isolated and accurate testing of application components. It also compares the native runner with established testing frameworks like Jest and Mocha, noting its built-in functionalities and advantages, such as faster performance due to its core integration. The guide provides practical advice on setting up and organizing tests, utilizing advanced features, and collecting code coverage, while also highlighting the benefits of using the native test runner, including reduced decision-making overhead and ease of adoption for developers familiar with other frameworks. This overview encourages developers to explore the Node.js test runner for its efficiency and seamless integration into Node-based projects.