https://github.com/wimpyprogrammer/jest-mock-examples

Examples of mocking in Jest tests
https://github.com/wimpyprogrammer/jest-mock-examples

jest mock mocking testing unit-testing

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Examples of mocking in Jest tests

• Host: GitHub
• URL: https://github.com/wimpyprogrammer/jest-mock-examples
• Owner: wimpyprogrammer
• License: mit
• Created: 2021-07-05T04:59:22.000Z (almost 4 years ago)
• Default Branch: main
• Last Pushed: 2024-08-24T16:49:01.000Z (10 months ago)
• Last Synced: 2024-08-25T15:09:50.902Z (10 months ago)
• Topics: jest, mock, mocking, testing, unit-testing
• Language: JavaScript
• Homepage: https://www.wimpyprogrammer.com/understanding-jest-mocks
• Size: 1.21 MB
• Stars: 2
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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# jest-mock-examples

[![Tests](https://github.com/wimpyprogrammer/jest-mock-examples/actions/workflows/tests.yml/badge.svg)](https://github.com/wimpyprogrammer/jest-mock-examples/actions/workflows/tests.yml)

Examples of mocking in Jest tests

## Summary

### When Jest Automocking Enabled

  

    

    Has __mocks__ file

    No __mocks__ file

  

  

    

    Core

    External

    Local

    Core

    External

    Local

  

  

    jest.mock()

    __mocks__

    __mocks__

    __mocks__

    generated

    generated

    generated

  

  

    jest.mock(factory)

    factory

    factory

    factory

    factory

    factory

    factory

  

  

    jest.mock()


mockFn.mockReturnValue(value)

    value

    value

    value

    value

    value

    value

  

  

    jest.doMock()

    __mocks__

    __mocks__

    __mocks__

    generated

    generated

    generated

  

  

    jest.doMock(factory)

    factory

    factory

    factory

    factory

    factory

    factory

  

  

    jest.doMock()


mockFn.mockReturnValue(value)

    value

    value

    value

    value

    value

    value

  

  

    jest.unmock()

    unmocked

    unmocked

    unmocked

    unmocked

    unmocked

    unmocked

  

  

    jest.dontMock()

    unmocked

    unmocked

    unmocked

    unmocked

    unmocked

    unmocked

  

  

    (nothing)

    unmocked

    __mocks__

    __mocks__

    unmocked

    generated

    generated

  

### When Jest Automocking Disabled

  

    

    Has __mocks__ file

    No __mocks__ file

  

  

    

    Core

    External

    Local

    Core

    External

    Local

  

  

    jest.mock()

    __mocks__

    __mocks__

    __mocks__

    generated

    generated

    generated

  

  

    jest.mock(factory)

    factory

    factory

    factory

    factory

    factory

    factory

  

  

    jest.mock()


mockFn.mockReturnValue(value)

    value

    value

    value

    value

    value

    value

  

  

    jest.doMock()

    __mocks__

    __mocks__

    __mocks__

    generated

    generated

    generated

  

  

    jest.doMock(factory)

    factory

    factory

    factory

    factory

    factory

    factory

  

  

    jest.doMock()


mockFn.mockReturnValue(value)

    value

    value

    value

    value

    value

    value

  

  

    jest.unmock()

    unmocked

    unmocked

    unmocked

    unmocked

    unmocked

    unmocked

  

  

    jest.dontMock()

    unmocked

    unmocked

    unmocked

    unmocked

    unmocked

    unmocked

  

  

    (nothing)

    unmocked

    __mocks__

    unmocked

    unmocked

    unmocked

    unmocked