react-native: Cannot test WebView - Cannot read property 'decelerationRate' of undefined

Description

I updated from react-native 0.39 to 0.41.2. Now, WebView tests fail.

Reproduction

My example is more complicated (I shallow render a component containing a WebView) but I can reproduce it with the following snippet:

import React from 'react';
import { shallow } from 'enzyme'
import { WebView } from 'react-native';

describe('Test', () => {
    it('test', () => {
        shallow(<WebView />);
    });
});

TypeError: Cannot read property 'decelerationRate' of undefined

      at Object.<anonymous> (node_modules\react-native\Libraries\Components\WebView\WebView.ios.js:541:3254)
      at Object.get WebView [as WebView] (node_modules\react-native\Libraries\react-native\react-native.js:69:22)
      at Object.<anonymous> 

I’m sure it’s not an enzyme bug as I can reproduce it with ‘react-test-renderer’ as well.

Solution

?

Additional Information

• React Native version: 0.41.2 (React: 15.4.2)
• Platform: neither
• Operating System: At least Windows and CentOS