react-native enzyme test

myTest.test.js

import React from 'react';
import createTestApp from '../testHelper';

import MyContainer from '../../app/modules/MyContainer';

describe('<MyContainer>', () => {
  let view;
  let store;
  beforeEach(async () => {
    const container = createTestApp(<MyContainer/>)
    view = container.view;
    store = container.store;
  });
  console.log(view);
  console.log(store);
  it('should test', () => {
    expect('foo').toBe('foo');
  });
});

test-env.js

// this file is ran before any other test files
import Enzyme from 'enzyme';
import Adapter from 'enzyme-adapter-react-16';
Enzyme.configure({adapter: new Adapter()});

// This will mutate `react-native`'s require cache with `react-native-mock-render`'s.
require('react-native-mock-render/mock');

// do this so we can use Enzyme mount with React-Native
// https://blog.joinroot.com/mounting-react-native-components-with-enzyme-and-jsdom/
const jsdom = require('jsdom').jsdom;                    
global.document = jsdom('');                             
global.window = document.defaultView;                    
Object.keys(document.defaultView).forEach((property) => {
  if (typeof global[property] === 'undefined') {         
    global[property] = document.defaultView[property];   
  }                                                      
});

testHelper.js

import React from 'react';
import Enzyme, {mount} from 'enzyme';
import {Provider} from 'react-redux';
import {applyMiddleware, createStore, compose} from 'redux';
import * as reduxLoop from 'redux-loop';

import Adapter from 'enzyme-adapter-react-16';
Enzyme.configure({adapter: new Adapter()});

import middleware from '../app/redux/middleware';
import reducer from '../app/redux/reducer';

const enhancer = compose(
  applyMiddleware(...middleware),
  reduxLoop.install()
);

export default function createTestApp(element, initialState) {
  const store = createStore(reducer, initialState, enhancer);
  const view = mount(
    <Provider store={store}>
      {element}
    </Provider>
  );
  return {view, store};
}