babel-plugin-jest-hoist
Advanced tools
Package description
The babel-plugin-jest-hoist npm package is designed to work with Jest, a popular JavaScript testing framework. It allows Jest to hoist `jest.mock`, `jest.unmock`, `jest.enableAutomock`, `jest.disableAutomock`, `jest.useFakeTimers`, `jest.useRealTimers`, `jest.setMock`, and `jest.clearAllMocks` calls to the top of the file. This is necessary because Jest needs to isolate modules for mocking before they are used in tests, and doing so manually can be error-prone and tedious.
Hoisting jest.mock calls
Automatically hoists `jest.mock` calls to the top of the file, ensuring that modules are mocked before any other code execution.
"use strict";\njest.mock('moduleName');\nconsole.log('This is a test.');"Hoisting jest.useFakeTimers calls
Automatically hoists `jest.useFakeTimers` calls to the top, allowing tests to use fake timers from the start.
"use strict";\njest.useFakeTimers();\nconsole.log('This is a test with fake timers.');"Similar to babel-plugin-jest-hoist, babel-plugin-rewire allows for modifying module internals, such as variables and functions, for testing purposes. However, it focuses on enabling the rewire functionality rather than specifically working with Jest's global methods.
While ts-jest is a TypeScript preprocessor with source map support for Jest that lets you use Jest to test projects written in TypeScript, it includes features for handling module mocking and hoisting in a way that's compatible with TypeScript, offering a similar but TypeScript-focused functionality.
Changelog
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.Readme
Babel plugin to hoist jest.disableAutomock, jest.enableAutomock, jest.unmock, jest.mock calls above import statements. This plugin is automatically included when using babel-jest.
$ npm install babel-plugin-jest-hoist
.babelrc (Recommended).babelrc
{
"plugins": ["jest-hoist"]
}
$ babel --plugins jest-hoist script.js
require("babel-core").transform("code", {
plugins: ["jest-hoist"]
});
FAQs
Babel plugin to hoist `jest.disableAutomock`, `jest.enableAutomock`, `jest.unmock`, `jest.mock`, calls above `import` statements. This plugin is automatically included when using [babel-jest](https://github.com/jestjs/jest/tree/main/packages/babel-jest).
The npm package babel-plugin-jest-hoist receives a total of 19,323,683 weekly downloads. As such, babel-plugin-jest-hoist popularity was classified as popular.
We found that babel-plugin-jest-hoist demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 6 open source maintainers collaborating on the project.
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