babel-plugin-jest-hoist
Advanced tools
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/facebook/jest/tree/main/packages/babel-jest)
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
29.2.0
[@jest/cli, jest-config] A seed for the test run will be randomly generated, or set by a CLI option (#13400)[@jest/cli, jest-config] --show-seed will display the seed value in the report, and can be set via a CLI flag or through the config file (#13400)[jest-config] Add readInitialConfig utility function (#13356)[jest-core] Allow testResultsProcessor to be async (#13343)[@jest/environment, jest-environment-node, jest-environment-jsdom, jest-runtime] Add getSeed() to the jest object (#13400)[expect, @jest/expect-utils] Allow isA utility to take a type argument (#13355)[expect] Expose AsyncExpectationResult and SyncExpectationResult types (#13411)[babel-plugin-jest-hoist] Ignore TSTypeQuery when checking for hoisted references (#13367)[jest-core] Fix detectOpenHandles false positives for some special objects such as TLSWRAP (#13414)[jest-mock] Fix mocking of getters and setters on classes (#13398)[jest-reporters] Revert: Transform file paths into hyperlinks (#13399)[@jest/types] Infer type of each table correctly when the table is a tuple or array (#13381)[@jest/types] Rework typings to allow the *ReturnedWith matchers to be called with no argument (#13385)[*] Update @babel/* deps, resulting in slightly different stack traces for each (#13422)[jest-runner] Do not instrument v8 coverage data if coverage should not be collected (#13282)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.
$ yarn add --dev babel-plugin-jest-hoist
babel.config.js (Recommended)module.exports = {
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 20,123,015 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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