content: import React from 'react'; // eslint-disable-line no-unused-vars
  import { View } from 'react-native';
  
  class AppNavigator extends React.Component {
    render() {
      return <View>AppNavigator</View>;
    }
  }
  
  AppNavigator.router = {
    getStateForAction: jest.fn(() => ({})),
    getActionForPathAndParams: jest.fn(() => ({})),
  };
  
  export const StackNavigator = () => {
    return AppNavigator;
  };
  
  const createAction = (type: string) => (payload: Object = {}) => ({
    type,
    ...payload,
  });
  
  export const NavigationActions = {
    navigate: createAction('NAVIGATE'),
    reset: createAction('RESET'),
    NAVIGATE: 'NAVIGATE',
    BACK: 'BACK',
    RESET: 'RESET',
  };
  
  export const addNavigationHelpers = () => {
    return 'addNavigationHelpers';
  };
  
  export const Header = () => {
    return 'Header';
  };
  