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 16.0.0
jest <pattern> is now case-insensitive.it.only, it.skip, test.only, test.skip and xtest.--testNamePattern=pattern or -t <pattern> to run individual tests in test files.a, o, p, q or enter while tests are running in the watch mode, the test run will be interrupted.--bail now works together with --watch.test.concurrent for concurrent async tests..jsx extension.jest.clearAllMocks to clear all mocks manually.jest-snapshot can now be more easily integrated into other test runners and used in other projects.fit or when an error is thrown in a test.toHaveBeenLastCalledWith, toHaveBeenCalledWith, lastCalledWith and toBeCalledWith failure messages.toBeInstanceOf matcher.toContainEqual matcher.toThrowErrorMatchingSnapshot matcher.moduleNameMapper resolution.setupTestFrameworkScriptFile script to make it easier to use chai together with Jest.--findRelatedTests <fileA> <fileB> cli option to run tests related to the specified files.jest.deepUnmock to babel-plugin-jest-hoist.jest.runTimersToTime which is useful together with fake timers.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 18,669,885 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.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Security News
A new report explores how advancements in LLMs are enhancing cyber threats, including polymorphic malware, personalized spearphishing, and the risk of hijacking customer service bots.
Security News
ESLint has approved an RFC that adds support for TypeScript configuration files, which is aimed at improving the developer experience and recognizing changes in the evolving JavaScript ecosystem.
Security News
The NVD is facing a significant backlog with over 12,500 CVEs awaiting analysis, and more than 50% of known exploited vulnerabilities (KEVs) left unenriched since mid-February.