jest-setup.js

/**
 * @flow
 * eslint-env jest 
 */

// See https://github.com/facebook/jest/issues/2208
jest.mock('Linking', () => ({
  addEventListener: jest.fn(),
  removeEventListener: jest.fn(),
  openURL: jest.fn(),
  canOpenURL: jest.fn(),
  getInitialURL: jest
    .fn()
    .mockImplementation((value: string) => Promise.resolve(value)),
}));

// See https://github.com/facebook/react-native/issues/11659
jest.mock('ScrollView', () => {
  // $FlowExpectedError
  const RealComponent = require.requireActual('ScrollView');
  class ScrollView extends RealComponent {
    scrollTo = () => {};
  }
  return ScrollView;
});

// $FlowExpectedError
Date.now = jest.fn(() => 0);