Jest · Delightful JavaScript Testing
WebJest 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 quickly.
Getting Started · Jest
WebIntroduction. Getting Started. Version: 29.7. Getting Started. Install Jest using your favorite package manager: npm. Yarn. pnpm. npm install --save-dev jest. Let's get started by writing a test for a hypothetical function that adds two numbers. First, create a sum.js file: function sum(a, b) { return a + b; } module.exports = sum;
GitHub - jestjs/jest: Delightful JavaScript Testing.
Web👩🏻💻 Developer Ready: A comprehensive JavaScript testing solution. Works out of the box for most JavaScript projects. 🏃🏽 Instant Feedback: Fast, interactive watch mode only runs test files related to changed files. 📸 Snapshot Testing: Capture snapshots of large objects to simplify testing and to analyze how they change over time.
jest - npm
WebDelightful JavaScript Testing.. Latest version: 29.7.0, last published: 8 months ago. Start using jest in your project by running `npm i jest`. There are 13134 other projects in the npm registry using jest.
Testing React Apps · Jest
WebSee 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 snapshot feature to interact with the component and capture the rendered output and create a snapshot file: Link.test.js.
Jest CLI Options · Jest
WebThe jest command line runner has a number of useful options. You can run jest --help to view all available options. Many of the options shown below can also be used together to run tests exactly the way you want. Every one of Jest's Configuration options can also be specified through the CLI.
Expect · Jest
WebVersion: 29.7. Expect. When you're writing tests, you often need to check that values meet certain conditions. expect gives you access to a number of "matchers" that let you validate different things. tip. For additional Jest matchers maintained by the Jest Community check out jest-extended. info.
Jest
WebJest is worked on by a team of volunteers in their spare time. You can find out ways to talk to community members below. Browse the docs. Find what you're looking for in our detailed documentation and guides. Learn how to get startedwith Jest. Troubleshootproblems with Jest. Learn how to configure Jest.
Getting Started · Jest
WebGetting Started. Install Jest using yarn: yarn add --dev jest. Copy. Or npm: npm install --save-dev jest. Copy. Note: Jest documentation uses yarn commands, but npm will also work. You can compare yarn and npm commands in the yarn docs, here. Let's get started by writing a test for a hypothetical function that adds two numbers.
Testing Web Frameworks · Jest
WebLast updated on Mar 17, 2024 by Harry Dobrev. 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.
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