Keyword Analysis & Research: jest
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Jest · Delightful JavaScript Testing
https://jestjs.io/
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.
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Getting Started · Jest
https://jestjs.io/docs/getting-started
WebGetting 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) {.
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GitHub - jestjs/jest: Delightful JavaScript Testing.
https://github.com/jestjs/jest
WebWorks out of the box for most JavaScript projects. ๐๐ฝ Instant Feedback: Fast, interactive watch mode only runs test files related to changed files. ๐ธ Snapshot Testing: Capture snapshots of large objects to simplify testing and to analyze how โฆ
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Testing React Apps · Jest
https://jestjs.io/docs/tutorial-react
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.
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Configuring Jest · Jest
https://jestjs.io/docs/configuration
WebConfiguring Jest. The Jest philosophy is to work great by default, but sometimes you just need more configuration power. It is recommended to define the configuration in a dedicated JavaScript, TypeScript or JSON file. The file will be discovered automatically, if it is named jest.config.js|ts|mjs|cjs|json.
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Jest CLI Options · Jest
https://jestjs.io/docs/cli
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.
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Mock Functions · Jest
https://jestjs.io/docs/mock-functions
Webjest. mock ('../foo-bar-baz', => {const originalModule = jest. requireActual ('../foo-bar-baz'); //Mock the default export and named export 'foo' return {__esModule: true,... originalModule, default: jest. fn (() => 'mocked baz'), foo: 'mocked foo',};}); test ('should do a partial mock', => {const defaultExportResult = defaultExport ();
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Getting Started · Jest
https://archive.jestjs.io/docs/en/22.x/getting-started.html
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.
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Getting Started · Jest
https://archive.jestjs.io/docs/en/getting-started
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.
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Testing Web Frameworks · Jest
https://jestjs.io/docs/testing-frameworks
WebVersion: 29.7. Testing Web Frameworks. 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. React. Testing ReactJS components with Jest by Kent C. Dodds ( @kentcdodds) Vue.js.
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