jest-environment-node
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Package description
The jest-environment-node npm package is a test environment for Jest that simulates a Node.js environment. It is used when testing Node.js specific code. It provides a global environment that's set up for each test file to be executed in a Node-like environment, with all the necessary globals like `process` and `Buffer` available.
Simulating Node.js Environment
This configuration in Jest's setup file tells Jest to use the Node environment for testing. It is useful when you want to test code that relies on Node.js APIs.
module.exports = { testEnvironment: 'jest-environment-node' };Global Setup and Teardown
This feature allows you to extend the Node environment to add custom setup and teardown logic that runs before and after each test suite.
class CustomEnvironment extends NodeEnvironment {
async setup() {
await super.setup();
// Your setup code here
}
async teardown() {
// Your teardown code here
await super.teardown();
}
}Custom Module Mocking
In a Node environment, you can mock Node modules like 'fs' to control their behavior during tests, which is useful for testing code that interacts with the filesystem without actually reading or writing files.
jest.mock('fs', () => ({
readFileSync: jest.fn().mockReturnValue('mocked content'),
}));This package is similar to jest-environment-node but is intended for testing web applications by simulating a browser environment using jsdom. It provides a DOM API that can be used in tests.
This package integrates Jest with Puppeteer for end-to-end testing. It sets up a browser environment and allows for testing user interactions with a real browser.
This package is designed for integration with Selenium WebDriver for browser-based testing. It is similar to jest-environment-puppeteer but uses WebDriver API for controlling browsers.
Changelog
26.6.2
[jest-core] Add findRelatedTests and nonFlagArgs in allowed config options for updateConfigAndRun in watch plugins (#10659)[babel-plugin-jest-hoist] Preserve order of hoisted mock nodes within containing block (#10536)[babel-plugin-jest-hoist] Hoist pure constants to support experimental JSX transform in hoisted mocks (#10723)[babel-preset-jest] Update babel-preset-current-node-syntax to support top level await (#10747)[expect] Revert "Fix objectContaining to work recursively into sub-objects (#10508)" (#10766)[jest-circus, jest-jasmine2] fix: don't assume stack is always a string (#10697)[jest-config] Fix bug introduced in watch mode by PR #10678 (#10692)[jest-config] Throw correct error for missing preset modules (#10737)[jest-resolve-dependencies] Resolve mocks as dependencies (#10713)[jest-runtime] Handle file URLs in dynamic imports (#10744)[jest-runtime, babel-jest] Pass more ESM options to @jest/transform (#10752)[jest-runtime] Properly inject extraGlobals into the runtime (#10758)[jest-transform] Link to ESM docs on syntax errors (#10748)[docs] Add docs for using mocks in TypeScript (#10415)[eslint-config-fb-strict] Move package from this repo to fbjs repo (#10739)[examples] Update TypeScript example to show use of newer Jest types (#10399)[jest-cli] chore: standardize files and folder names (#10698)[jest-config] Switch ts-node Register type to Service due to deprecation (#11210)FAQs
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The npm package jest-environment-node receives a total of 18,966,864 weekly downloads. As such, jest-environment-node popularity was classified as popular.
We found that jest-environment-node demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 3 open source maintainers collaborating on the project.
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