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jest-environment-node
Advanced tools
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.
jest-cli 11.0.0, babel-jest 11.0.0 (pre-releases 0.9 to 0.10)
testRunner: "jasmine1"
into your configuration.jest-util
, jest-mock
, jest-jasmine1
, jest-jasmine2
, jest-environment-node
, jest-environment-jsdom
packages.babel-jest-preset
and babel-jest
as packages. babel-jest
is now being auto-detected.babel-plugin-jest-hoist
which hoists jest.unmock
, jest.mock
and the new jest.enableAutomock
and jest.disableAutomock
API.babel-jest
integration and react-native
testing.babel-jest
.jest.mock('moduleName', moduleFactory)
feature. jest.mock
now gets hoisted by default. jest.doMock
was added to explicitly mock a module without the hoisting feature of babel-jest
.--watch
.--watch
.--watch
will now only runs tests related to changed files. --watch=all
can be used to run all tests on file system changes.--watch
re-runs to not trigger test runs during a branch switch in version control.jest.fn()
and jest.fn(implementation)
as convenient shortcuts for jest.genMockFunction()
and jest.genMockFunction().mockImplementation()
.automock
option to turn off automocking globally.process.NODE_ENV
to test
unless otherwise specified.moduleNameMapper
config option when used with paths.throw 'string errors'
.--onlyChanged
option.toBeCalled
Jasmine 2 custom matcher messages.xit
and xdescribe
.preprocessCachingDisabled
config option.testEnvironment
option to customize the sandbox environment.@scoped/name
npm packages.FAQs
Unknown package
The npm package jest-environment-node receives a total of 15,199,290 weekly downloads. As such, jest-environment-node popularity was classified as popular.
We found that jest-environment-node demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 3 open source maintainers collaborating on the project.
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