|  | // Copyright (C) 2018 The Android Open Source Project | 
|  | // | 
|  | // Licensed under the Apache License, Version 2.0 (the "License"); | 
|  | // you may not use this file except in compliance with the License. | 
|  | // You may obtain a copy of the License at | 
|  | // | 
|  | //      http://www.apache.org/licenses/LICENSE-2.0 | 
|  | // | 
|  | // Unless required by applicable law or agreed to in writing, software | 
|  | // distributed under the License is distributed on an "AS IS" BASIS, | 
|  | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | 
|  | // See the License for the specific language governing permissions and | 
|  | // limitations under the License. | 
|  |  | 
|  | const fs = require('fs'); | 
|  | const path = require('path'); | 
|  | const NodeEnvironment = require('jest-environment-node'); | 
|  | const puppeteer = require('puppeteer'); | 
|  |  | 
|  | module.exports = class HeadlessEnvironment extends NodeEnvironment { | 
|  | constructor(config) { | 
|  | super(config); | 
|  | } | 
|  |  | 
|  | async setup() { | 
|  | await super.setup(); | 
|  | this.global.__BROWSER__ = await puppeteer.launch(); | 
|  | } | 
|  |  | 
|  | async teardown() { | 
|  | await this.global.__BROWSER__.close(); | 
|  | await super.teardown(); | 
|  | } | 
|  |  | 
|  | runScript(script) { | 
|  | return super.runScript(script); | 
|  | } | 
|  | } |