jest-expo

A Jest preset to painlessly test your Expo apps.

If you have problems with the code in this repository, please file issues & bug reports at https://github.com/expo/expo. Thanks!

Installation

• yarn add jest-expo --dev or npm i jest-expo --save-dev

• Add the following config to package.json:

  "scripts": {
    "test": "node_modules/.bin/jest"
  },
  "jest": {
    "preset": "jest-expo"
  }

• Create a __tests__ directory anywhere you like and a Example-test.js file inside of it, and add this code:

  it('works', () => {
    expect(1).toBe(1);
  });

• Run npm test and it should pass

Learning Jest

Read the excellent documentation