@wordpress/jest-preset-default

Jest Preset Default

Default Jest preset for WordPress development.

Installation

Install the module

npm install @wordpress/jest-preset-default --save-dev

Note: This package requires Node.js 12.0.0 or later. It is not compatible with older versions.

Setup

Via jest.config.json or jest field in package.json

{
	"preset": "@wordpress/jest-preset-default"
}

Usage

Brief explanations of options included

• moduleNameMapper - all css and scss files containing CSS styles will be stubbed out.
• modulePaths - the root dir of the project is used as a location to search when resolving modules.
• setupFiles - runs code before each test which sets up global variables required in the testing environment.
• setupFilesAfterEnv - runs code which adds improved support for Console object and React components to the testing framework before each test.
• snapshotSerializers - makes it possible to use snapshot tests on Enzyme wrappers.
• testMatch- includes /test/ subfolder in addition to the glob patterns Jest uses to detect test files. It detects only test files containing .js (or .ts) suffix. It doesn't match files with .spec.js suffix.
• timers - use of fake timers for functions such as setTimeout is enabled.
• transform - keeps the default babel-jest transformer.
• verbose - each individual test won't be reported during the run.