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/**
 * Copyright 2017 Google Inc., PhantomJS Authors All rights reserved.
 *
 * 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.
 */

'use strict';

const puppeteer = require('puppeteer');

function sniffDetector() {
  const userAgent = window.navigator.userAgent;
  const platform = window.navigator.platform;

  window.navigator.__defineGetter__('userAgent', function () {
    window.navigator.sniffed = true;
    return userAgent;
  });

  window.navigator.__defineGetter__('platform', function () {
    window.navigator.sniffed = true;
    return platform;
  });
}

(async () => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  await page.evaluateOnNewDocument(sniffDetector);
  await page.goto('https://www.google.com', { waitUntil: 'networkidle2' });
  console.log('Sniffed: ' + (await page.evaluate(() => !!navigator.sniffed)));

  await browser.close();
})();