launcher.spec.ts

/**
 * Copyright 2017 Google Inc. 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.
 */
import fs from 'fs';
import os from 'os';
import path from 'path';
import sinon from 'sinon';
import { promisify } from 'util';
import Protocol from 'devtools-protocol';
import {
  getTestState,
  itChromeOnly,
  itFailsFirefox,
  itOnlyRegularInstall,
} from './mocha-utils'; // eslint-disable-line import/extensions
import utils from './utils.js';
import expect from 'expect';
import rimraf from 'rimraf';
import { Page } from '../lib/cjs/puppeteer/common/Page.js';

const rmAsync = promisify(rimraf);
const mkdtempAsync = promisify(fs.mkdtemp);
const readFileAsync = promisify(fs.readFile);
const statAsync = promisify(fs.stat);
const TMP_FOLDER = path.join(os.tmpdir(), 'pptr_tmp_folder-');
const FIREFOX_TIMEOUT = 30 * 1000;

describe('Launcher specs', function () {
  if (getTestState().isFirefox) this.timeout(FIREFOX_TIMEOUT);

  describe('Puppeteer', function () {
    describe('BrowserFetcher', function () {
      it('should download and extract chrome linux binary', async () => {
        const { server, puppeteer } = getTestState();

        const downloadsFolder = await mkdtempAsync(TMP_FOLDER);
        const browserFetcher = puppeteer.createBrowserFetcher({
          platform: 'linux',
          path: downloadsFolder,
          host: server.PREFIX,
        });
        const expectedRevision = '123456';
        let revisionInfo = browserFetcher.revisionInfo(expectedRevision);
        server.setRoute(
          revisionInfo.url.substring(server.PREFIX.length),
          (req, res) => {
            server.serveFile(req, res, '/chromium-linux.zip');
          }
        );

        expect(revisionInfo.local).toBe(false);
        expect(browserFetcher.platform()).toBe('linux');
        expect(browserFetcher.product()).toBe('chrome');
        expect(!!browserFetcher.host()).toBe(true);
        expect(await browserFetcher.canDownload('100000')).toBe(false);
        expect(await browserFetcher.canDownload(expectedRevision)).toBe(true);

        revisionInfo = await browserFetcher.download(expectedRevision);
        expect(revisionInfo.local).toBe(true);
        expect(await readFileAsync(revisionInfo.executablePath, 'utf8')).toBe(
          'LINUX BINARY\n'
        );
        const expectedPermissions = os.platform() === 'win32' ? 0o666 : 0o755;
        expect(
          (await statAsync(revisionInfo.executablePath)).mode & 0o777
        ).toBe(expectedPermissions);
        expect(await browserFetcher.localRevisions()).toEqual([
          expectedRevision,
        ]);
        await browserFetcher.remove(expectedRevision);
        expect(await browserFetcher.localRevisions()).toEqual([]);
        await rmAsync(downloadsFolder);
      });
      it('should download and extract firefox linux binary', async () => {
        const { server, puppeteer } = getTestState();

        const downloadsFolder = await mkdtempAsync(TMP_FOLDER);
        const browserFetcher = puppeteer.createBrowserFetcher({
          platform: 'linux',
          path: downloadsFolder,
          host: server.PREFIX,
          product: 'firefox',
        });
        const expectedVersion = '75.0a1';
        let revisionInfo = browserFetcher.revisionInfo(expectedVersion);
        server.setRoute(
          revisionInfo.url.substring(server.PREFIX.length),
          (req, res) => {
            server.serveFile(
              req,
              res,
              `/firefox-${expectedVersion}.en-US.linux-x86_64.tar.bz2`
            );
          }
        );

        expect(revisionInfo.local).toBe(false);
        expect(browserFetcher.platform()).toBe('linux');
        expect(browserFetcher.product()).toBe('firefox');
        expect(await browserFetcher.canDownload('100000')).toBe(false);
        expect(await browserFetcher.canDownload(expectedVersion)).toBe(true);

        revisionInfo = await browserFetcher.download(expectedVersion);
        expect(revisionInfo.local).toBe(true);
        expect(await readFileAsync(revisionInfo.executablePath, 'utf8')).toBe(
          'FIREFOX LINUX BINARY\n'
        );
        const expectedPermissions = os.platform() === 'win32' ? 0o666 : 0o755;
        expect(
          (await statAsync(revisionInfo.executablePath)).mode & 0o777
        ).toBe(expectedPermissions);
        expect(await browserFetcher.localRevisions()).toEqual([
          expectedVersion,
        ]);
        await browserFetcher.remove(expectedVersion);
        expect(await browserFetcher.localRevisions()).toEqual([]);
        await rmAsync(downloadsFolder);
      });
    });

    describe('Browser.disconnect', function () {
      it('should reject navigation when browser closes', async () => {
        const { server, puppeteer, defaultBrowserOptions } = getTestState();
        server.setRoute('/one-style.css', () => {});
        const browser = await puppeteer.launch(defaultBrowserOptions);
        const remote = await puppeteer.connect({
          browserWSEndpoint: browser.wsEndpoint(),
        });
        const page = await remote.newPage();
        const navigationPromise = page
          .goto(server.PREFIX + '/one-style.html', { timeout: 60000 })
          .catch((error_) => error_);
        await server.waitForRequest('/one-style.css');
        remote.disconnect();
        const error = await navigationPromise;
        expect(error.message).toBe(
          'Navigation failed because browser has disconnected!'
        );
        await browser.close();
      });
      it('should reject waitForSelector when browser closes', async () => {
        const { server, puppeteer, defaultBrowserOptions } = getTestState();

        server.setRoute('/empty.html', () => {});
        const browser = await puppeteer.launch(defaultBrowserOptions);
        const remote = await puppeteer.connect({
          browserWSEndpoint: browser.wsEndpoint(),
        });
        const page = await remote.newPage();
        const watchdog = page
          .waitForSelector('div', { timeout: 60000 })
          .catch((error_) => error_);
        remote.disconnect();
        const error = await watchdog;
        expect(error.message).toContain('Protocol error');
        await browser.close();
      });
    });
    describe('Browser.close', function () {
      it('should terminate network waiters', async () => {
        const { server, puppeteer, defaultBrowserOptions } = getTestState();

        const browser = await puppeteer.launch(defaultBrowserOptions);
        const remote = await puppeteer.connect({
          browserWSEndpoint: browser.wsEndpoint(),
        });
        const newPage = await remote.newPage();
        const results = await Promise.all([
          newPage.waitForRequest(server.EMPTY_PAGE).catch((error) => error),
          newPage.waitForResponse(server.EMPTY_PAGE).catch((error) => error),
          browser.close(),
        ]);
        for (let i = 0; i < 2; i++) {
          const message = results[i].message;
          expect(message).toContain('Target closed');
          expect(message).not.toContain('Timeout');
        }
        await browser.close();
      });
    });
    describe('Puppeteer.launch', function () {
      it('should reject all promises when browser is closed', async () => {
        const { defaultBrowserOptions, puppeteer } = getTestState();
        const browser = await puppeteer.launch(defaultBrowserOptions);
        const page = await browser.newPage();
        let error = null;
        const neverResolves = page
          .evaluate(() => new Promise(() => {}))
          .catch((error_) => (error = error_));
        await browser.close();
        await neverResolves;
        expect(error.message).toContain('Protocol error');
      });
      it('should reject if executable path is invalid', async () => {
        const { defaultBrowserOptions, puppeteer } = getTestState();

        let waitError = null;
        const options = Object.assign({}, defaultBrowserOptions, {
          executablePath: 'random-invalid-path',
        });
        await puppeteer.launch(options).catch((error) => (waitError = error));
        expect(waitError.message).toContain('Failed to launch');
      });
      it('userDataDir option', async () => {
        const { defaultBrowserOptions, puppeteer } = getTestState();

        const userDataDir = await mkdtempAsync(TMP_FOLDER);
        const options = Object.assign({ userDataDir }, defaultBrowserOptions);
        const browser = await puppeteer.launch(options);
        // Open a page to make sure its functional.
        await browser.newPage();
        expect(fs.readdirSync(userDataDir).length).toBeGreaterThan(0);
        await browser.close();
        expect(fs.readdirSync(userDataDir).length).toBeGreaterThan(0);
        // This might throw. See https://github.com/puppeteer/puppeteer/issues/2778
        await rmAsync(userDataDir).catch(() => {});
      });
      it('userDataDir argument', async () => {
        const { isChrome, puppeteer, defaultBrowserOptions } = getTestState();

        const userDataDir = await mkdtempAsync(TMP_FOLDER);
        const options = Object.assign({}, defaultBrowserOptions);
        if (isChrome) {
          options.args = [
            ...(defaultBrowserOptions.args || []),
            `--user-data-dir=${userDataDir}`,
          ];
        } else {
          options.args = [
            ...(defaultBrowserOptions.args || []),
            `-profile`,
            userDataDir,
          ];
        }
        const browser = await puppeteer.launch(options);
        expect(fs.readdirSync(userDataDir).length).toBeGreaterThan(0);
        await browser.close();
        expect(fs.readdirSync(userDataDir).length).toBeGreaterThan(0);
        // This might throw. See https://github.com/puppeteer/puppeteer/issues/2778
        await rmAsync(userDataDir).catch(() => {});
      });
      it('userDataDir option should restore state', async () => {
        const { server, puppeteer, defaultBrowserOptions } = getTestState();

        const userDataDir = await mkdtempAsync(TMP_FOLDER);
        const options = Object.assign({ userDataDir }, defaultBrowserOptions);
        const browser = await puppeteer.launch(options);
        const page = await browser.newPage();
        await page.goto(server.EMPTY_PAGE);
        await page.evaluate(() => (localStorage.hey = 'hello'));
        await browser.close();

        const browser2 = await puppeteer.launch(options);
        const page2 = await browser2.newPage();
        await page2.goto(server.EMPTY_PAGE);
        expect(await page2.evaluate(() => localStorage.hey)).toBe('hello');
        await browser2.close();
        // This might throw. See https://github.com/puppeteer/puppeteer/issues/2778
        await rmAsync(userDataDir).catch(() => {});
      });
      // This mysteriously fails on Windows on AppVeyor. See
      // https://github.com/puppeteer/puppeteer/issues/4111
      xit('userDataDir option should restore cookies', async () => {
        const { server, puppeteer, defaultBrowserOptions } = getTestState();

        const userDataDir = await mkdtempAsync(TMP_FOLDER);
        const options = Object.assign({ userDataDir }, defaultBrowserOptions);
        const browser = await puppeteer.launch(options);
        const page = await browser.newPage();
        await page.goto(server.EMPTY_PAGE);
        await page.evaluate(
          () =>
            (document.cookie =
              'doSomethingOnlyOnce=true; expires=Fri, 31 Dec 9999 23:59:59 GMT')
        );
        await browser.close();

        const browser2 = await puppeteer.launch(options);
        const page2 = await browser2.newPage();
        await page2.goto(server.EMPTY_PAGE);
        expect(await page2.evaluate(() => document.cookie)).toBe(
          'doSomethingOnlyOnce=true'
        );
        await browser2.close();
        // This might throw. See https://github.com/puppeteer/puppeteer/issues/2778
        await rmAsync(userDataDir).catch(() => {});
      });
      it('should return the default arguments', async () => {
        const { isChrome, isFirefox, puppeteer } = getTestState();

        if (isChrome) {
          expect(puppeteer.defaultArgs()).toContain('--no-first-run');
          expect(puppeteer.defaultArgs()).toContain('--headless');
          expect(puppeteer.defaultArgs({ headless: false })).not.toContain(
            '--headless'
          );
          expect(puppeteer.defaultArgs({ userDataDir: 'foo' })).toContain(
            `--user-data-dir=${path.resolve('foo')}`
          );
        } else if (isFirefox) {
          expect(puppeteer.defaultArgs()).toContain('--headless');
          expect(puppeteer.defaultArgs()).toContain('--no-remote');
          expect(puppeteer.defaultArgs()).toContain('--foreground');
          expect(puppeteer.defaultArgs({ headless: false })).not.toContain(
            '--headless'
          );
          expect(puppeteer.defaultArgs({ userDataDir: 'foo' })).toContain(
            '--profile'
          );
          expect(puppeteer.defaultArgs({ userDataDir: 'foo' })).toContain(
            'foo'
          );
        } else {
          expect(puppeteer.defaultArgs()).toContain('-headless');
          expect(puppeteer.defaultArgs({ headless: false })).not.toContain(
            '-headless'
          );
          expect(puppeteer.defaultArgs({ userDataDir: 'foo' })).toContain(
            '-profile'
          );
          expect(puppeteer.defaultArgs({ userDataDir: 'foo' })).toContain(
            path.resolve('foo')
          );
        }
      });
      it('should report the correct product', async () => {
        const { isChrome, isFirefox, puppeteer } = getTestState();
        if (isChrome) expect(puppeteer.product).toBe('chrome');
        else if (isFirefox) expect(puppeteer.product).toBe('firefox');
      });
      itFailsFirefox('should work with no default arguments', async () => {
        const { defaultBrowserOptions, puppeteer } = getTestState();
        const options = Object.assign({}, defaultBrowserOptions);
        options.ignoreDefaultArgs = true;
        const browser = await puppeteer.launch(options);
        const page = await browser.newPage();
        expect(await page.evaluate('11 * 11')).toBe(121);
        await page.close();
        await browser.close();
      });
      it('should filter out ignored default arguments', async () => {
        const { defaultBrowserOptions, puppeteer } = getTestState();
        // Make sure we launch with `--enable-automation` by default.
        const defaultArgs = puppeteer.defaultArgs();
        const browser = await puppeteer.launch(
          Object.assign({}, defaultBrowserOptions, {
            // Ignore first and third default argument.
            ignoreDefaultArgs: [defaultArgs[0], defaultArgs[2]],
          })
        );
        const spawnargs = browser.process().spawnargs;
        if (!spawnargs) {
          throw new Error('spawnargs not present');
        }
        expect(spawnargs.indexOf(defaultArgs[0])).toBe(-1);
        expect(spawnargs.indexOf(defaultArgs[1])).not.toBe(-1);
        expect(spawnargs.indexOf(defaultArgs[2])).toBe(-1);
        await browser.close();
      });
      it('should have default URL when launching browser', async function () {
        const { defaultBrowserOptions, puppeteer } = getTestState();
        const browser = await puppeteer.launch(defaultBrowserOptions);
        const pages = (await browser.pages()).map((page) => page.url());
        expect(pages).toEqual(['about:blank']);
        await browser.close();
      });
      itFailsFirefox(
        'should have custom URL when launching browser',
        async () => {
          const { server, puppeteer, defaultBrowserOptions } = getTestState();

          const options = Object.assign({}, defaultBrowserOptions);
          options.args = [server.EMPTY_PAGE].concat(options.args || []);
          const browser = await puppeteer.launch(options);
          const pages = await browser.pages();
          expect(pages.length).toBe(1);
          const page = pages[0];
          if (page.url() !== server.EMPTY_PAGE) await page.waitForNavigation();
          expect(page.url()).toBe(server.EMPTY_PAGE);
          await browser.close();
        }
      );
      it('should pass the timeout parameter to browser.waitForTarget', async () => {
        const { puppeteer, defaultBrowserOptions } = getTestState();
        const options = Object.assign({}, defaultBrowserOptions, {
          timeout: 1,
        });
        let error = null;
        await puppeteer.launch(options).catch((error_) => (error = error_));
        expect(error).toBeInstanceOf(puppeteer.errors.TimeoutError);
      });
      it('should set the default viewport', async () => {
        const { puppeteer, defaultBrowserOptions } = getTestState();
        const options = Object.assign({}, defaultBrowserOptions, {
          defaultViewport: {
            width: 456,
            height: 789,
          },
        });
        const browser = await puppeteer.launch(options);
        const page = await browser.newPage();
        expect(await page.evaluate('window.innerWidth')).toBe(456);
        expect(await page.evaluate('window.innerHeight')).toBe(789);
        await browser.close();
      });
      it('should disable the default viewport', async () => {
        const { puppeteer, defaultBrowserOptions } = getTestState();
        const options = Object.assign({}, defaultBrowserOptions, {
          defaultViewport: null,
        });
        const browser = await puppeteer.launch(options);
        const page = await browser.newPage();
        expect(page.viewport()).toBe(null);
        await browser.close();
      });
      it('should take fullPage screenshots when defaultViewport is null', async () => {
        const { server, puppeteer, defaultBrowserOptions } = getTestState();

        const options = Object.assign({}, defaultBrowserOptions, {
          defaultViewport: null,
        });
        const browser = await puppeteer.launch(options);
        const page = await browser.newPage();
        await page.goto(server.PREFIX + '/grid.html');
        const screenshot = await page.screenshot({
          fullPage: true,
        });
        expect(screenshot).toBeInstanceOf(Buffer);
        await browser.close();
      });
      it('should set the debugging port', async () => {
        const { puppeteer, defaultBrowserOptions } = getTestState();

        const options = Object.assign({}, defaultBrowserOptions, {
          defaultViewport: null,
          debuggingPort: 9999,
        });
        const browser = await puppeteer.launch(options);
        const url = new URL(browser.wsEndpoint());
        await browser.close();
        expect(url.port).toBe('9999');
      });
      it('should not allow setting debuggingPort and pipe', async () => {
        const { puppeteer, defaultBrowserOptions } = getTestState();

        const options = Object.assign({}, defaultBrowserOptions, {
          defaultViewport: null,
          debuggingPort: 9999,
          pipe: true,
        });

        let error = null;
        await puppeteer.launch(options).catch((error_) => (error = error_));
        expect(error.message).toContain('either pipe or debugging port');
      });
      itChromeOnly(
        'should launch Chrome properly with --no-startup-window and waitForInitialPage=false',
        async () => {
          const { defaultBrowserOptions, puppeteer } = getTestState();
          const options = {
            args: ['--no-startup-window'],
            waitForInitialPage: false,
            // This is needed to prevent Puppeteer from adding an initial blank page.
            // See also https://github.com/puppeteer/puppeteer/blob/ad6b736039436fcc5c0a262e5b575aa041427be3/src/node/Launcher.ts#L200
            ignoreDefaultArgs: true,
            ...defaultBrowserOptions,
          };
          const browser = await puppeteer.launch(options);
          const pages = await browser.pages();
          expect(pages.length).toBe(0);
          await browser.close();
        }
      );
    });

    describe('Puppeteer.launch', function () {
      let productName;

      before(async () => {
        const { puppeteer } = getTestState();
        productName = puppeteer._productName;
      });

      after(async () => {
        const { puppeteer } = getTestState();
        // @ts-expect-error launcher is a private property that users can't
        // touch, but for testing purposes we need to reset it.
        puppeteer._lazyLauncher = undefined;
        puppeteer._productName = productName;
      });

      itOnlyRegularInstall('should be able to launch Chrome', async () => {
        const { puppeteer } = getTestState();
        const browser = await puppeteer.launch({ product: 'chrome' });
        const userAgent = await browser.userAgent();
        await browser.close();
        expect(userAgent).toContain('Chrome');
      });

      it('falls back to launching chrome if there is an unknown product but logs a warning', async () => {
        const { puppeteer } = getTestState();
        const consoleStub = sinon.stub(console, 'warn');
        // @ts-expect-error purposeful bad input
        const browser = await puppeteer.launch({ product: 'SO_NOT_A_PRODUCT' });
        const userAgent = await browser.userAgent();
        await browser.close();
        expect(userAgent).toContain('Chrome');
        expect(consoleStub.callCount).toEqual(1);
        expect(consoleStub.firstCall.args).toEqual([
          'Warning: unknown product name SO_NOT_A_PRODUCT. Falling back to chrome.',
        ]);
      });

      itOnlyRegularInstall(
        'should be able to launch Firefox',
        async function () {
          this.timeout(FIREFOX_TIMEOUT);
          const { puppeteer } = getTestState();
          const browser = await puppeteer.launch({ product: 'firefox' });
          const userAgent = await browser.userAgent();
          await browser.close();
          expect(userAgent).toContain('Firefox');
        }
      );
    });

    describe('Puppeteer.connect', function () {
      it('should be able to connect multiple times to the same browser', async () => {
        const { puppeteer, defaultBrowserOptions } = getTestState();

        const originalBrowser = await puppeteer.launch(defaultBrowserOptions);
        const otherBrowser = await puppeteer.connect({
          browserWSEndpoint: originalBrowser.wsEndpoint(),
        });
        const page = await otherBrowser.newPage();
        expect(await page.evaluate(() => 7 * 8)).toBe(56);
        otherBrowser.disconnect();

        const secondPage = await originalBrowser.newPage();
        expect(await secondPage.evaluate(() => 7 * 6)).toBe(42);
        await originalBrowser.close();
      });
      it('should be able to close remote browser', async () => {
        const { defaultBrowserOptions, puppeteer } = getTestState();

        const originalBrowser = await puppeteer.launch(defaultBrowserOptions);
        const remoteBrowser = await puppeteer.connect({
          browserWSEndpoint: originalBrowser.wsEndpoint(),
        });
        await Promise.all([
          utils.waitEvent(originalBrowser, 'disconnected'),
          remoteBrowser.close(),
        ]);
      });
      it('should support ignoreHTTPSErrors option', async () => {
        const { httpsServer, puppeteer, defaultBrowserOptions } =
          getTestState();

        const originalBrowser = await puppeteer.launch(defaultBrowserOptions);
        const browserWSEndpoint = originalBrowser.wsEndpoint();

        const browser = await puppeteer.connect({
          browserWSEndpoint,
          ignoreHTTPSErrors: true,
        });
        const page = await browser.newPage();
        let error = null;
        const [serverRequest, response] = await Promise.all([
          httpsServer.waitForRequest('/empty.html'),
          page.goto(httpsServer.EMPTY_PAGE).catch((error_) => (error = error_)),
        ]);
        expect(error).toBe(null);
        expect(response.ok()).toBe(true);
        expect(response.securityDetails()).toBeTruthy();
        const protocol = serverRequest.socket.getProtocol().replace('v', ' ');
        expect(response.securityDetails().protocol()).toBe(protocol);
        await page.close();
        await browser.close();
      });
      // @see https://github.com/puppeteer/puppeteer/issues/4197
      itFailsFirefox('should support targetFilter option', async () => {
        const { server, puppeteer, defaultBrowserOptions } = getTestState();

        const originalBrowser = await puppeteer.launch(defaultBrowserOptions);
        const browserWSEndpoint = originalBrowser.wsEndpoint();

        const page1 = await originalBrowser.newPage();
        await page1.goto(server.EMPTY_PAGE);

        const page2 = await originalBrowser.newPage();
        await page2.goto(server.EMPTY_PAGE + '?should-be-ignored');

        const browser = await puppeteer.connect({
          browserWSEndpoint,
          targetFilter: (targetInfo: Protocol.Target.TargetInfo) =>
            !targetInfo.url?.includes('should-be-ignored'),
        });

        const pages = await browser.pages();

        await page2.close();
        await page1.close();
        await browser.disconnect();
        await originalBrowser.close();

        expect(pages.map((p: Page) => p.url()).sort()).toEqual([
          'about:blank',
          server.EMPTY_PAGE,
        ]);
      });
      itFailsFirefox(
        'should be able to reconnect to a disconnected browser',
        async () => {
          const { server, puppeteer, defaultBrowserOptions } = getTestState();

          const originalBrowser = await puppeteer.launch(defaultBrowserOptions);
          const browserWSEndpoint = originalBrowser.wsEndpoint();
          const page = await originalBrowser.newPage();
          await page.goto(server.PREFIX + '/frames/nested-frames.html');
          originalBrowser.disconnect();

          const browser = await puppeteer.connect({ browserWSEndpoint });
          const pages = await browser.pages();
          const restoredPage = pages.find(
            (page) =>
              page.url() === server.PREFIX + '/frames/nested-frames.html'
          );
          expect(utils.dumpFrames(restoredPage.mainFrame())).toEqual([
            'http://localhost:<PORT>/frames/nested-frames.html',
            '    http://localhost:<PORT>/frames/two-frames.html (2frames)',
            '        http://localhost:<PORT>/frames/frame.html (uno)',
            '        http://localhost:<PORT>/frames/frame.html (dos)',
            '    http://localhost:<PORT>/frames/frame.html (aframe)',
          ]);
          expect(await restoredPage.evaluate(() => 7 * 8)).toBe(56);
          await browser.close();
        }
      );
      // @see https://github.com/puppeteer/puppeteer/issues/4197#issuecomment-481793410
      itFailsFirefox(
        'should be able to connect to the same page simultaneously',
        async () => {
          const { puppeteer } = getTestState();

          const browserOne = await puppeteer.launch();
          const browserTwo = await puppeteer.connect({
            browserWSEndpoint: browserOne.wsEndpoint(),
          });
          const [page1, page2] = await Promise.all([
            new Promise<Page>((x) =>
              browserOne.once('targetcreated', (target) => x(target.page()))
            ),
            browserTwo.newPage(),
          ]);
          expect(await page1.evaluate(() => 7 * 8)).toBe(56);
          expect(await page2.evaluate(() => 7 * 6)).toBe(42);
          await browserOne.close();
        }
      );
      it('should be able to reconnect', async () => {
        const { puppeteer, server } = getTestState();
        const browserOne = await puppeteer.launch();
        const browserWSEndpoint = browserOne.wsEndpoint();
        const pageOne = await browserOne.newPage();
        await pageOne.goto(server.EMPTY_PAGE);
        browserOne.disconnect();

        const browserTwo = await puppeteer.connect({ browserWSEndpoint });
        const pages = await browserTwo.pages();
        const pageTwo = pages.find((page) => page.url() === server.EMPTY_PAGE);
        await pageTwo.reload();
        const bodyHandle = await pageTwo.waitForSelector('body', {
          timeout: 10000,
        });
        await bodyHandle.dispose();
        await browserTwo.close();
      });
    });
    describe('Puppeteer.executablePath', function () {
      itOnlyRegularInstall('should work', async () => {
        const { puppeteer } = getTestState();

        const executablePath = puppeteer.executablePath();
        expect(fs.existsSync(executablePath)).toBe(true);
        expect(fs.realpathSync(executablePath)).toBe(executablePath);
      });
      it('returns executablePath for channel', () => {
        const { puppeteer } = getTestState();

        const executablePath = puppeteer.executablePath('chrome');
        expect(executablePath).toBeTruthy();
      });
    });
  });

  describe('Browser target events', function () {
    itFailsFirefox('should work', async () => {
      const { server, puppeteer, defaultBrowserOptions } = getTestState();

      const browser = await puppeteer.launch(defaultBrowserOptions);
      const events = [];
      browser.on('targetcreated', () => events.push('CREATED'));
      browser.on('targetchanged', () => events.push('CHANGED'));
      browser.on('targetdestroyed', () => events.push('DESTROYED'));
      const page = await browser.newPage();
      await page.goto(server.EMPTY_PAGE);
      await page.close();
      expect(events).toEqual(['CREATED', 'CHANGED', 'DESTROYED']);
      await browser.close();
    });
  });

  describe('Browser.Events.disconnected', function () {
    it('should be emitted when: browser gets closed, disconnected or underlying websocket gets closed', async () => {
      const { puppeteer, defaultBrowserOptions } = getTestState();
      const originalBrowser = await puppeteer.launch(defaultBrowserOptions);
      const browserWSEndpoint = originalBrowser.wsEndpoint();
      const remoteBrowser1 = await puppeteer.connect({ browserWSEndpoint });
      const remoteBrowser2 = await puppeteer.connect({ browserWSEndpoint });

      let disconnectedOriginal = 0;
      let disconnectedRemote1 = 0;
      let disconnectedRemote2 = 0;
      originalBrowser.on('disconnected', () => ++disconnectedOriginal);
      remoteBrowser1.on('disconnected', () => ++disconnectedRemote1);
      remoteBrowser2.on('disconnected', () => ++disconnectedRemote2);

      await Promise.all([
        utils.waitEvent(remoteBrowser2, 'disconnected'),
        remoteBrowser2.disconnect(),
      ]);

      expect(disconnectedOriginal).toBe(0);
      expect(disconnectedRemote1).toBe(0);
      expect(disconnectedRemote2).toBe(1);

      await Promise.all([
        utils.waitEvent(remoteBrowser1, 'disconnected'),
        utils.waitEvent(originalBrowser, 'disconnected'),
        originalBrowser.close(),
      ]);

      expect(disconnectedOriginal).toBe(1);
      expect(disconnectedRemote1).toBe(1);
      expect(disconnectedRemote2).toBe(1);
    });
  });
});