Article helper gist for "Unit testing in React Native with Jest and Enzyme" (https://github.com/hdsenevi/react-native-unit-testing-recipes)

BACKUP_Button.test.js

import React from 'react';
import {shallow} from 'enzyme';
import Button from './Button';

jest.mock('Platform', () => {
    const Platform = require.requireActual('Platform');
    Platform.OS = 'ios';
    return Platform;
})

describe('Button', () => {
    describe('Rendering', () => {
        it('should match to snapshot', () => {
            const component = shallow(<Button label="test label"/>)
            expect(component).toMatchSnapshot()
        });
    });
});