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babel-plugin-jest-hoist

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babel-plugin-jest-hoist

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)


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Package description

What is babel-plugin-jest-hoist?

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.

What are babel-plugin-jest-hoist's main functionalities?

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.');"

Other packages similar to babel-plugin-jest-hoist

Changelog

Source

28.1.3

Features

  • [jest-leak-detector] Use native FinalizationRegistry when it exists to get rid of external C dependency (#12973)

Fixes

  • [jest-changed-files] Fix a lock-up after repeated invocations (#12757)
  • [@jest/expect-utils] Fix deep equality of ImmutableJS OrderedSets (#12977)
  • [jest-mock] Add index signature support for spyOn types (#13013, #13020)
  • [jest-snapshot] Fix indentation of awaited inline snapshots (#12986)

Chore & Maintenance

  • [*] Replace internal usage of pretty-format/ConvertAnsi with jest-serializer-ansi-escapes (#12935, #13004)
  • [docs] Update spyOn docs (#13000)

Readme

Source

babel-plugin-jest-hoist

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.

Installation

$ yarn add --dev babel-plugin-jest-hoist

Usage

module.exports = {
  plugins: ['jest-hoist'],
};

Via CLI

$ babel --plugins jest-hoist script.js

Via Node API

require('@babel/core').transform('code', {
  plugins: ['jest-hoist'],
});

FAQs

Package last updated on 13 Jul 2022

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