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Jest OS detection

This module allows you to specify on which OS your tests should run. A common use case would be to have a CI running on different OS (say mac and windows) but you want to have all your tests in the same file. Unfortunately, some of your tests should only run on a specific platform due to OS specific features.

All tests that should not be run on the current platform will be automatically skipped.

Install

# with npm
npm install jest-os-detection

# with yarn
yarn add jest-os-detection

Setup

In your package.json

"jest": {
    "setupFilesAfterEnv": ["jest-os-detection"],
  }

Usage

describe.onWindows('this describe is only interpreted on Windows', () => {
  it.onMac('this test is only interpreted on Mac', () => {})
  test.onLinux('this test is only interpreted on Linux', () => {})
  it.onMac.skip('this test is only interpreted on Mac but skipped', () => {})
  test.onLinux.skip('this test is only interpreted on Linux but skipped', () => {})
  it.onMac.only('only this test is executed on Mac', () => {})
  test.onLinux.only('only this test is executed on Linux', () => {})
})

describe.onWindows.each([1, 2, 3])('several describe on windows', describeValue => {
  it.onMac.each([1, 2, 3, 4])('several tests on windows', testValue => {})
  test.onLinux.each([1, 2, 3, 4])('several tests on windows', testValue => {})
  it.onMac.each.skip([1, 2, 3, 4])('several tests skipped on windows', testValue => {})
  test.onLinux.each.skip([1, 2, 3, 4])('several tests skipped on windows', testValue => {})
  it.onMac.each.only([1, 2, 3, 4])('only these tests will be executed on windows', testValue => {})
  test.onLinux.each.only([1, 2, 3, 4])('only these tests will be executed on windows', testValue => {})
})

Supported features

Supported commands:

  • describe()
  • it()
  • test()

Supported platform:

  • <command>.onWindows()
  • <command>.onMac()
  • <command>.onLinux()
  • <command>.skipWindows()
  • <command>.skipMac()
  • <command>.skipLinux()

Supported sub-commands:

  • <command>.<platform>.each()
  • <command>.<platform>.only()
  • <command>.<platform>.skip()
  • <command>.<platform>.skip.each()
  • <command>.<platform>.only.each()

TypeScript

To avoid type errors globally, you can add this to your tsconfig:

{
  "files": [
    "node_modules/jest-os-detection/index.d.ts"
  ]
}