How to use newPageDelegate method in Playwright Internal

Best JavaScript code snippet using playwright-internal

browserContext.js

...253    }254    await this._closePromise;255  }256  async newPage(metadata) {257    const pageDelegate = await this.newPageDelegate();258    const pageOrError = await pageDelegate.pageOrError();259    if (pageOrError instanceof _page.Page) {260      if (pageOrError.isClosed()) throw new Error('Page has been closed.');261      return pageOrError;262    }263    throw pageOrError;264  }265  addVisitedOrigin(origin) {266    this._origins.add(origin);267  }268  async storageState() {269    const result = {270      cookies: await this.cookies(),271      origins: []...

ffBrowser.js

Source: ffBrowser.js

...238  }239  pages() {240    return this._ffPages().map(ffPage => ffPage._initializedPage).filter(pageOrNull => !!pageOrNull);241  }242  async newPageDelegate() {243    (0, _browserContext.assertBrowserContextIsNotOwned)(this);244    const {245      targetId246    } = await this._browser._connection.send('Browser.newPage', {247      browserContextId: this._browserContextId248    }).catch(e => {249      if (e.message.includes('Failed to override timezone')) throw new Error(`Invalid timezone ID: ${this._options.timezoneId}`);250      throw e;251    });252    return this._browser._ffPages.get(targetId);253  }254  async _doCookies(urls) {255    const {256      cookies...

wkBrowser.js

Source: wkBrowser.js

...198  }199  pages() {200    return this._wkPages().map(wkPage => wkPage._initializedPage).filter(pageOrNull => !!pageOrNull);201  }202  async newPageDelegate() {203    (0, _browserContext.assertBrowserContextIsNotOwned)(this);204    const {205      pageProxyId206    } = await this._browser._browserSession.send('Playwright.createPage', {207      browserContextId: this._browserContextId208    });209    return this._browser._wkPages.get(pageProxyId);210  }211  async _doCookies(urls) {212    const {213      cookies214    } = await this._browser._browserSession.send('Playwright.getAllCookies', {215      browserContextId: this._browserContextId216    });...

Using AI Code Generation

1const playwright = require("playwright");2(async () => {3  const browser = await playwright["chromium"].launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  await page.screenshot({ path: "example.png" });7  await browser.close();8})();9const playwright = require("playwright");10(async () => {11  const browser = await playwright["chromium"].launch();12  const context = await browser.newContext();13  const page = await context.newPage();14  await page.screenshot({ path: "example.png" });15  await browser.close();16})();17const playwright = require("playwright");18(async () => {19  const browser = await playwright["chromium"].launch();20  const context = await browser.newContext();21  const page = await context.newPage();22  await page.screenshot({ path: "example.png" });23  await browser.close();24})();25const playwright = require("playwright");26(async () => {27  const browser = await playwright["chromium"].launch();28  const context = await browser.newContext();29  const page = await context.newPage();30  await page.screenshot({ path: "example.png" });31  await browser.close();32})();33const playwright = require("playwright");34(async () => {35  const browser = await playwright["chromium"].launch();36  const context = await browser.newContext();37  const page = await context.newPage();38  await page.screenshot({ path: "example.png" });39  await browser.close();40})();41const playwright = require("playwright");42(async () => {43  const browser = await playwright["chromium"].launch();44  const context = await browser.newContext();45  const page = await context.newPage();

Using AI Code Generation

1const playwright = require('playwright');2(async () => {3  const browser = await playwright.chromium.launch({ headless: false });4  const context = await browser.newContext();5  const page = await context.newPage();6  const pageDelegate = await page._delegate;7  const newPageDelegate = await pageDelegate.newPageDelegate();8  const newPage = await playwright.Page.from(newPageDelegate);9  await newPage.screenshot({ path: 'example.png' });10  await browser.close();11})();12const playwright = require('playwright');13(async () => {14  const browser = await playwright.chromium.launch({ headless: false });15  const context = await browser.newContext();16  const page = await context.newPage();17  const newPage = await page.context().newPage();18  await newPage.screenshot({ path: 'example.png' });19  await browser.close();20})();

Using AI Code Generation

1const playwright = require('playwright');2(async () => {3    const browser = await playwright.webkit.launch();4    const context = await browser.newContext();5    const page = await context.newPageDelegate();6    await page.screenshot({ path: `example.png` });7    await browser.close();8})();

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const page = await browser.newPage();5  await page.screenshot({ path: 'example.png' });6  await browser.close();7})();8const { chromium } = require('playwright');9(async () => {10  const browser = await chromium.launch();11  const page = await browser.newPage();12  await page.screenshot({ path: 'example.png' });13  await browser.close();14})();15const { chromium } = require('playwright');16(async () => {17  const browser = await chromium.launch();18  const page = await browser.newPage();19  await page.screenshot({ path: 'example.png' });20  await browser.close();21})();22const { chromium } = require('playwright');23(async () => {24  const browser = await chromium.launch();25  const page = await browser.newPage();26  await page.screenshot({ path: 'example.png' });27  await browser.close();28})();29const { chromium } = require('playwright');30(async () => {31  const browser = await chromium.launch();32  const page = await browser.newPage();33  await page.screenshot({ path: 'example.png' });34  await browser.close();35})();36const { chromium } = require('playwright');37(async () => {38  const browser = await chromium.launch();39  const page = await browser.newPage();40  await page.screenshot({ path: 'example.png' });41  await browser.close();42})();43const { chromium } =

Using AI Code Generation

1const playwright = require('playwright');2const { newPageDelegate } = require('playwright/lib/server/browserContext');3(async () => {4  const browser = await playwright.chromium.launch();5  const browserContext = await browser.newContext();6  const page = await newPageDelegate(browserContext);7  await browser.close();8})();9const { Page } = require('./page');10const { assert } = require('../utils/utils');11const { PageDelegate } = require('./pageDelegate');12const { PageProxy } = require('./pageProxy');13const { PageProxyDelegate } = require('./pageProxyDelegate');14const { serializeError } = require('../utils/serializers');15function newPageDelegate(browserContext) {16  const page = new Page(browserContext);17  const delegate = new PageDelegate(page);18  return delegate._initialize();19}20class PageDelegate {21  constructor(page) {22    this._page = page;23    this._pageProxy = new PageProxy(this, page);24    this._pageProxyDelegate = new PageProxyDelegate(this._pageProxy);25    this._page._setPageProxy(this._pageProxy);26  }27  async _initialize() {28    await this._pageProxyDelegate._initialize();29    return this._pageProxyDelegate;30  }31  async _onPageProxyCrash() {32  }33  async _onPageProxyClose() {34  }35  async _onPageProxyLog(message) {36  }37  async _onPageProxyBinding(binding) {38  }39  async _onPageProxyRequest(request) {40  }41  async _onPageProxyResponse(response) {42  }43  async _onPageProxyDialog(dialog) {44  }45  async _onPageProxyFileChooser(fileChooser) {46  }47  async _onPageProxyDownload(download) {48  }49  async _onPageProxyWorker(worker) {50  }51  async _onPageProxyVideo(video) {52  }53  async _onPageProxyError(error) {54  }55}56module.exports = { newPageDelegate };57const { assert

Using AI Code Generation

1const { newPageDelegate } = require('playwright/lib/server/browserContext');2const { Page } = require('playwright/lib/server/page');3const { BrowserContext } = require('playwright/lib/server/browserContext');4const { Browser } = require('playwright/lib/server/browser');5const { BrowserServer } = require('playwright/lib/server/browserServer');6const { BrowserType } = require('playwright/lib/server/browserType');7const { helper } = require('playwright/lib/helper');8const { debugLogger } = require('playwright/lib/utils/debugLogger');9const { BrowserContextDelegate } = require('./browserContextDelegate');10const { PageDelegate } = require('./pageDelegate');11class PlaywrightInternal {12  constructor() {13    this._browserType = new BrowserType('chromium', null);14    this._browser = new Browser(this._browserType, null, null, null);15    this._browserContext = new BrowserContext(this._browser, null, null, null);16    this._browserContextDelegate = new BrowserContextDelegate(this._browserContext);17    this._pageDelegate = new PageDelegate();18  }19  async newPage() {20    const page = await newPageDelegate(this._browserContextDelegate, this._pageDelegate);21    return page;22  }23}24const playwrightInternal = new PlaywrightInternal();25(async () => {26  const page = await playwrightInternal.newPage();27  await page.screenshot({ path: 'example.png' });28})();29const { BrowserContextBase } = require('playwright/lib/server/browserContext');30const { helper } = require('playwright/lib/helper');31class BrowserContextDelegate extends BrowserContextBase {32  constructor(browserContext) {33    super(browserContext, null, null, null);34  }35  async _doSlowMo() {36  }37  async _initialize() {38  }39  async _loadDefaultContextOptions() {40  }41  async _waitForEvent(event, predicate, options) {42  }43  async _doCookies(urls) {44  }45  async _doAddCookies(cookies) {46  }47  async _doClearCookies() {48  }49  async _doGrantPermissions(permissions, origin) {

Using AI Code Generation

1const playwright = require('playwright');2const { newPageDelegate } = require('playwright/lib/internal/delegates');3(async () => {4  const browser = await playwright.chromium.launch();5  const page = newPageDelegate(await browser.newPage());6  await page.screenshot({ path: `example.png` });7  await browser.close();8})();9const { Page } = require('playwright/lib/server/page');10const { PageBinding } = require('playwright/lib/server/pageBinding');11const { FrameManager } = require('playwright/lib/server/frameManager');12const { Frame } = require('playwright/lib/server/frame');13const { Worker } = require('playwright/lib/server/worker');14const { JSHandle } = require('playwright/lib/server/jsHandle');15const { ElementHandle } = require('playwright/lib/server/elementHandler');16const { Dialog } = require('playwright/lib/server/dialog');17const { ConsoleMessage } = require('playwright/lib/server/consoleMessage');18const { ExecutionContext } = require('playwright/lib/server/executionContext');19const { BindingCall } = require('playwright/lib/server/bindingCall');20const { Coverage } = require('playwright/lib/server/coverage');21const { BrowserContext } = require('playwright/lib/server/browserContext');22const { Browser } = require('playwright/lib/server/browser');23const { Connection } = require('playwright/lib/server/connection');24const { FileChooser } = require('playwright/lib/server/fileChooser');25const { Request } = require('playwright/lib/server/network');26const { Response } = require('playwright/lib/server/network');27const { Route } = require('playwright/lib/server/network');28const { WebSocket } = require('playwright/lib/server/network');29const { BrowserServer } = require('playwright/lib/server/browserServer');30const { Selectors } = require('playwright/lib/server/selectors');31const { Accessibility } = require('playwright/lib/server/accessibility');32const { Tracing } = require('playwright/lib/server/tracing');33const { Video } = require('playwright/lib/server/video');34const { Download } = require('playwright/lib/server/download');35const { BrowserType } = require('playwright/lib/server/browserType');36const delegates = {

Using AI Code Generation

1const { newPageDelegate } = require('playwright/lib/server/chromium/crPage');2const page = await browser.newPage();3const delegate = newPageDelegate(page, browserContext);4const { newPageDelegate } = require('playwright/lib/server/chromium/crPage');5const page = await browser.newPage();6const delegate = newPageDelegate(page, browserContext);7const { newPageDelegate } = require('playwright/lib/server/chromium/crPage');8const page = await browser.newPage();9const delegate = newPageDelegate(page, browserContext);10const { newPageDelegate } = require('playwright/lib/server/chromium/crPage');11const page = await browser.newPage();12const delegate = newPageDelegate(page, browserContext);13const { newPageDelegate } = require('playwright/lib/server/chromium/crPage');14const page = await browser.newPage();15const delegate = newPageDelegate(page, browserContext);16const { newPageDelegate } = require('playwright/lib/server/chromium/crPage');17const page = await browser.newPage();18const delegate = newPageDelegate(page, browserContext);19const { newPageDelegate } = require('playwright/lib/server/chromium/crPage');20const page = await browser.newPage();21const delegate = newPageDelegate(page, browserContext);

Using AI Code Generation

1const page = await context.newPageDelegate();2await page.screenshot({ path: 'example.png' });3class WKPage extends Page {4  async newPageDelegate() {5  }6}7class WKBrowser extends Browser {8  async newPageDelegate() {9  }10}11class WKBrowserContext extends BrowserContext {12  async newPageDelegate() {13  }14}15class WKConnection extends Connection {16  async newPageDelegate() {17  }18}19class WK extends BrowserType {20  async newPageDelegate() {21  }22}23class WKBrowserServer extends BrowserServer {24  async newPageDelegate() {25  }26}27class WKBrowserType extends BrowserType {28  async newPageDelegate() {29  }30}31class WKFrameManager extends FrameManager {32  async newPageDelegate() {33  }34}35class WKFrame extends Frame {36  async newPageDelegate() {37  }38}39class WKExecutionContext extends ExecutionContext {40  async newPageDelegate() {41  }42}43class WKJSHandle extends JSHandle {44  async newPageDelegate() {45  }46}47class WKTarget extends Target {48  async newPageDelegate() {49  }50}

Using AI Code Generation

1const { Page } = require('playwright-core/lib/server/page');2Page.prototype.newPageDelegate = function() {3  return this._frameManager.newPageDelegate();4};5const page = await browser.newPage();6const newPage = await page.newPageDelegate();7const newPage2 = await page.newPageDelegate();8const newPage3 = await page.newPageDelegate();9await newPage.close();10await newPage2.close();11await newPage3.close();12await browser.close();13await browserServer.close();14await context.close();15await contextServer.close();16await contextServer.close();

StackOverFlow community discussions

Questions

Discussion

Running Playwright in Azure Function

firefox browser does not start in playwright

Is it possible to get the selector from a locator object in playwright?

firefox browser does not start in playwright

Jest + Playwright - Test callbacks of event-based DOM library

How to run a list of test suites in a single file concurrently in jest?

I played with your example for a while and I got the same errors. These are the things I found that made my example work:

It must be Linux. I know that you mentioned that you picked a Linux plan. But I found that in VS Code that part is hidden, and on the Web the default is Windows. This is important because only the Linux plan runs npm install on the server.

Make sure that you are building on the server. You can find this option in the VS Code Settings:

Make sure you set the environment variable PLAYWRIGHT_BROWSERS_PATH, before making the publish.

https://stackoverflow.com/questions/63949978/running-playwright-in-azure-function

I found the error. It was because of some missing libraries need. I discovered this when I downgraded playwright to version 1.9 and ran the the code then this was the error msg:

(node:12876) UnhandledPromiseRejectionWarning: browserType.launch: Host system is missing dependencies!

Some of the Universal C Runtime files cannot be found on the system. You can fix
that by installing Microsoft Visual C++ Redistributable for Visual Studio from:
https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads

Full list of missing libraries:
    vcruntime140.dll
    msvcp140.dll
Error
    at Object.captureStackTrace (D:\Projects\snkrs-play\node_modules\playwright\lib\utils\stackTrace.js:48:19)
    at Connection.sendMessageToServer (D:\Projects\snkrs-play\node_modules\playwright\lib\client\connection.js:69:48)
    at Proxy.<anonymous> (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:64:61)
    at D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:64:67
    at BrowserType._wrapApiCall (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:77:34)
    at BrowserType.launch (D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:55:21)
    at D:\Projects\snkrs-play\index.js:4:35
    at Object.<anonymous> (D:\Projects\snkrs-play\index.js:7:3)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:12876) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:12876) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

A list of missing libraries was provided. After successful installments, firefox ran fine. I upgraded again to version 1.10 and firefox still works.

https://stackoverflow.com/questions/66984974/firefox-browser-does-not-start-in-playwright

Well this is one way, but not sure if it will work for all possible locators!.

// Get a selector from a playwright locator
import { Locator } from "@playwright/test";
export function extractSelector(locator: Locator) {
    const selector = locator.toString();
    const parts = selector.split("@");
    if (parts.length !== 2) { throw Error("extractSelector: susupect that this is not a locator"); }
    if (parts[0] !== "Locator") { throw Error("extractSelector: did not find locator"); }
    return parts[1];
}

https://stackoverflow.com/questions/72044959/is-it-possible-to-get-the-selector-from-a-locator-object-in-playwright

I found the error. It was because of some missing libraries need. I discovered this when I downgraded playwright to version 1.9 and ran the the code then this was the error msg:

(node:12876) UnhandledPromiseRejectionWarning: browserType.launch: Host system is missing dependencies!

Some of the Universal C Runtime files cannot be found on the system. You can fix
that by installing Microsoft Visual C++ Redistributable for Visual Studio from:
https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads

Full list of missing libraries:
    vcruntime140.dll
    msvcp140.dll
Error
    at Object.captureStackTrace (D:\Projects\snkrs-play\node_modules\playwright\lib\utils\stackTrace.js:48:19)
    at Connection.sendMessageToServer (D:\Projects\snkrs-play\node_modules\playwright\lib\client\connection.js:69:48)
    at Proxy.<anonymous> (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:64:61)
    at D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:64:67
    at BrowserType._wrapApiCall (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:77:34)
    at BrowserType.launch (D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:55:21)
    at D:\Projects\snkrs-play\index.js:4:35
    at Object.<anonymous> (D:\Projects\snkrs-play\index.js:7:3)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:12876) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:12876) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

A list of missing libraries was provided. After successful installments, firefox ran fine. I upgraded again to version 1.10 and firefox still works.

https://stackoverflow.com/questions/66984974/firefox-browser-does-not-start-in-playwright

This question is quite close to a "need more focus" question. But let's try to give it some focus:

Does Playwright has access to the cPicker object on the page? Does it has access to the window object?

Yes, you can access both cPicker and the window object inside an evaluate call.

Should I trigger the events from the HTML file itself, and in the callbacks, print in the DOM the result, in some dummy-element, and then infer from that dummy element text that the callbacks fired?

Exactly, or you can assign values to a javascript variable:

const cPicker = new ColorPicker({
  onClickOutside(e){
  },
  onInput(color){
    window['color'] = color;
  },
  onChange(color){
    window['result'] = color;
  }
})

And then

it('Should call all callbacks with correct arguments', async() => {
    await page.goto(`http://localhost:5000/tests/visual/basic.html`, {waitUntil:'load'})

    // Wait until the next frame
    await page.evaluate(() => new Promise(requestAnimationFrame))

    // Act
   
    // Assert
    const result = await page.evaluate(() => window['color']);
    // Check the value
})

https://stackoverflow.com/questions/65477895/jest-playwright-test-callbacks-of-event-based-dom-library

Assuming you are not running test with the --runinband flag, the simple answer is yes but it depends ????

There is a pretty comprehensive GitHub issue jest#6957 that explains certain cases of when tests are run concurrently or in parallel. But it seems to depend on a lot of edge cases where jest tries its best to determine the fastest way to run the tests given the circumstances.

To my knowledge there is no way to force jest to run in parallel.

Aside

Have you considered using playwright instead of puppeteer with jest? Playwright has their own internally built testing library called @playwright/test that is used in place of jest with a similar API. This library allows for explicitly defining test groups in a single file to run in parallel (i.e. test.describe.parallel) or serially (i.e. test.describe.serial). Or even to run all tests in parallel via a config option.

// parallel
test.describe.parallel('group', () => {
  test('runs in parallel 1', async ({ page }) => {});
  test('runs in parallel 2', async ({ page }) => {});
});

// serial
test.describe.serial('group', () => {
  test('runs first', async ({ page }) => {});
  test('runs second', async ({ page }) => {});
});

https://stackoverflow.com/questions/73497773/how-to-run-a-list-of-test-suites-in-a-single-file-concurrently-in-jest

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