mock-async-storage

Jest Mock AsyncStorage for react-native

Its a mock of react-native AsyncStorage for jest tests

Install

NPM

• Install: npm install --save mock-async-storage
• Module: require('mock-async-storage')

Editions

This package is published with the following editions:

• mock-async-storage/src/index.js is Source + ESNext + Import + Flow
• mock-async-storage aliases mock-async-storage/lib/index.js
• mock-async-storage/lib/index.js is Babel Compiled + ES2015 + Require

Older environments may need Babel's Polyfill or something similar.

Usage

In your test codes:

const mockStorage = require('mock-async-storage');
// or import { mock, release } from 'mock-async-storage';
// mock();
// release();

// For mock AsyncStorage
mockStorage.mock();

// For unmock
mockStorage.release();

Working example:

import 'react-native';
import { mock, release } from 'mock-async-storage'
import React from 'react';
import Index from '../index.android.js';

// Note: test renderer must be required after react-native.
import renderer from 'react-test-renderer';

mock()

import { AsyncStorage as storage } from 'react-native'

it('renders correctly', () => {
  const tree = renderer.create(
    <Index />
  );
});

it('Mock Async Storage working', async () => {
  await storage.setItem('myKey', 'myValue')
  const value = await storage.getItem('myKey')
  expect(value).toBe('myValue')
})