Jest is a JavaScript testing framework designed to ensure correctness of any JavaScript codebase. It allows you to write tests with an approachable, familiar and feature-rich API that gives you results …

There are two ways to have Jest global APIs typed for test files written in TypeScript. You can use type definitions which ships with Jest and will update each time you update Jest.

Jest is a universal testing platform, with the ability to adapt to any JavaScript library or framework. In this section, we'd like to link to community posts and articles about integrating Jest into popular JS libraries.

See React: Function and Class Components. Reminders that with Class components, we expect Jest to be used to test props and not methods directly. Now let's use React's test renderer and Jest's …

Jest is a universal testing platform, with the ability to adapt to any JavaScript library or framework. In this section, we'd like to link to community posts and articles about integrating Jest into popular JS libraries.

Jun 4, 2025 · Jest has been the most popular JavaScript testing framework for a decade. It is used by millions of developers, supporting a wide range of projects from small libraries to the largest …

Jest is a JavaScript testing framework designed to ensure correctness of any JavaScript codebase. It allows you to write tests with an approachable, familiar and feature-rich API that gives you results …

Jest é um framework de teste em JavaScript projetado para garantir a correção de qualquer código JavaScript. Ele permite que você escreva testes com uma API acessível, familiar e rica em recursos …

Execute node with --experimental-vm-modules, e.g. node --experimental-vm-modules node_modules/jest/bin/jest.js or NODE_OPTIONS="$NODE_OPTIONS --experimental-vm-modules" …

More information on how snapshot testing works and why we built it can be found on the release blog post. We recommend reading this blog post to get a good sense of when you should use snapshot …