使用CucumberJS / Puppeteer，如何使用多个场景扩展Page对象？

Question

我正在使用Puppeteer和CucumberJS编写测试自动化套件。

我遇到的问题是，在对象文件中的场景之间没有传递Page对象。

Test_1.features

Feature: Login and hit some buttons
    In order to show my issue
    As a stackOverflow users
    I want be able to login and select some buttons

  Scenario: Log in
      Given I have navigated to to the App "foobar"
      When I have selected the Imports button 
      I should see the Console on the page title

      When I have selected the Imports button 
      Then I should see the Imports on the page title

Test_2.features

Feature: Login and hit some buttons
    In order to show my issue
    As a stackOverflow users
    I want be able to login and select some buttons

  Scenario: Log in
      Given I have navigated to to the App "foobar"
      When I have selected the Imports button 
      I should see the Console on the page title

  Scenario: Navigate from the Imports page/list to the Console
      When I have selected the Imports button 
      Then I should see the Imports on the page title

我有一个world.js

'use strict';

const { setWorldConstructor } = require("cucumber");
const puppeteer = require("puppeteer");

class thisApp {
  constructor() {
      this.app = "";
  }

// Open browser
async openBrowser() {
  this.browser = await puppeteer.launch({
  headless: false,
  slowMo: 25 
  });
  this.page = await this.browser.newPage();
}

async appLogIn(username_password) {
   await this.page.waitFor(settings._3000);
   await this.navigateToAppLoginPage();
   await this.appEnterUsernamePassword(username_password);
   await this.page.click('[data-test-button-SignIn="true"]');
   await this.page.waitFor(settings._3000);
}

// Select the Imports button
async selectButtonNavigationPaneImports() {
  await this.page.click('[data-test-button-navigation-pane-imports="true"]');
}

// Select the Console button
async selectButtonNavigationPaneConsole() {
  await this.page.click('[data-test-button-navigation-pane-console="true"]');
}

}
setWorldConstructor(ePayApp);

我没有把所有步骤放在那里 - 我只是想举个例子。

app_steps.js

// Login
 Given(/^I have navigated to to the App "([^"]*)"$/, async 
  function(username_password){
  return this.appLogIn(username_password);
});

// import button
 When(/^I have selected the Imports button$/, async 
  function(){
  return this.selectButtonNavigationPaneImports();
});

// console button
 When(/^I have selected the Console button$/, async 
  function(){
  return this.selectButtonNavigationPaneConsole();
});

我有index.js

const { BeforeAll, Before, AfterAll, After } = require('cucumber');
const puppeteer = require('puppeteer');

Before(async function() {
   const browser = await puppeteer.launch({ headless: false, slowMo: 50 });
  this.browser = browser;
  this.page = page;
})

现在，当我在一个场景（Test_1.features）下完成所有步骤时，它可以工作。当我将测试分解为多个场景（Test_2.features）时，我得到：

 TypeError: Cannot read property 'click' of undefined

这让我相信在第二种情况下没有访问页面对象。

我究竟做错了什么？