Jest mock localStorage #test #jest

localStorage.js

// ./__mocks__/localStorage.js
let mockStorage = {};

module.exports = window.localStorage = {
  setItem: (key, val) => Object.assign(mockStorage, {[key]: val}),
  getItem: (key) => mockStorage[key],
  clear: () => mockStorage = {}
};


// Then import it in the reducer test file 
import '../__mocks__/localStorage';