grgr-dkrk/jest-mock-cheet-sheet

jest-mock-cheet-sheet

Getting Started

yarn
yarn test

Recipes

Class

Private Field & readonly

Date

setSystemTime

Exported Modules

Default Export(jest.spyOn)

Default Export(jest.requireActual)

Named Export(jest.spyOn)

Named Export(jest.requireActual)

Global

console.log

Math.rand

process.env

Jest Features

Mock

jest.mock()

__mocks__ directory

jest.doMock(), jest.dontMock()

jest.requireActual()

jest.unmock()

Spy

jest.spyOn()

Init Mocks

jest.mockClear

jest.mockReset

jest.mockRestore

JestFn

jest.fn()