Jest - local storage mock

const localStorageMock = (function () {
  let store = {}

  return {
    getItem: (key) => store[key] || null,
    setItem: (key, value) => {
      store[key] = value.toString()
    },
    removeItem: (key) => delete store[key],
    clear: () => { store = {} }
  }
})()

Object.defineProperty(window, 'localStorage', {
  value: localStorageMock
})