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How to use putListener method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactBrowserEventEmitter-test.internal.js

Source: ReactBrowserEventEmitter-test.internal.js

...37let putListener;38let deleteAllListeners;39let container;40function registerSimpleTestHandler() {41  putListener(CHILD, ON_CLICK_KEY, LISTENER);42  const listener = getListener(CHILD, ON_CLICK_KEY);43  expect(listener).toEqual(LISTENER);44  return getListener(CHILD, ON_CLICK_KEY);45}46describe('ReactBrowserEventEmitter', () => {47  beforeEach(() => {48    jest.resetModules();49    LISTENER.mockClear();50    // TODO: can we express this test with only public API?51    EventPluginHub = require('events/EventPluginHub');52    EventPluginRegistry = require('events/EventPluginRegistry');53    React = require('react');54    ReactDOM = require('react-dom');55    ReactDOMComponentTree = require('../client/ReactDOMComponentTree');56    ReactBrowserEventEmitter = require('../events/ReactBrowserEventEmitter');57    ReactTestUtils = require('react-dom/test-utils');58    container = document.createElement('div');59    document.body.appendChild(container);60    let GRANDPARENT_PROPS = {};61    let PARENT_PROPS = {};62    let CHILD_PROPS = {};63    function Child(props) {64      return <div ref={c => (CHILD = c)} {...props} />;65    }66    class ChildWrapper extends React.PureComponent {67      render() {68        return <Child {...this.props} />;69      }70    }71    function renderTree() {72      ReactDOM.render(73        <div ref={c => (GRANDPARENT = c)} {...GRANDPARENT_PROPS}>74          <div ref={c => (PARENT = c)} {...PARENT_PROPS}>75            <ChildWrapper {...CHILD_PROPS} />76          </div>77        </div>,78        container,79      );80    }81    renderTree();82    getListener = function(node, eventName) {83      const inst = ReactDOMComponentTree.getInstanceFromNode(node);84      return EventPluginHub.getListener(inst, eventName);85    };86    putListener = function(node, eventName, listener) {87      switch (node) {88        case CHILD:89          CHILD_PROPS[eventName] = listener;90          break;91        case PARENT:92          PARENT_PROPS[eventName] = listener;93          break;94        case GRANDPARENT:95          GRANDPARENT_PROPS[eventName] = listener;96          break;97      }98      // Rerender with new event listeners99      renderTree();100    };101    deleteAllListeners = function(node) {102      switch (node) {103        case CHILD:104          CHILD_PROPS = {};105          break;106        case PARENT:107          PARENT_PROPS = {};108          break;109        case GRANDPARENT:110          GRANDPARENT_PROPS = {};111          break;112      }113      renderTree();114    };115    idCallOrder = [];116  });117  afterEach(() => {118    document.body.removeChild(container);119    container = null;120  });121  it('should store a listener correctly', () => {122    registerSimpleTestHandler();123    const listener = getListener(CHILD, ON_CLICK_KEY);124    expect(listener).toBe(LISTENER);125  });126  it('should retrieve a listener correctly', () => {127    registerSimpleTestHandler();128    const listener = getListener(CHILD, ON_CLICK_KEY);129    expect(listener).toEqual(LISTENER);130  });131  it('should clear all handlers when asked to', () => {132    registerSimpleTestHandler();133    deleteAllListeners(CHILD);134    const listener = getListener(CHILD, ON_CLICK_KEY);135    expect(listener).toBe(undefined);136  });137  it('should invoke a simple handler registered on a node', () => {138    registerSimpleTestHandler();139    CHILD.click();140    expect(LISTENER).toHaveBeenCalledTimes(1);141  });142  it('should not invoke handlers if ReactBrowserEventEmitter is disabled', () => {143    registerSimpleTestHandler();144    ReactBrowserEventEmitter.setEnabled(false);145    CHILD.click();146    expect(LISTENER).toHaveBeenCalledTimes(0);147    ReactBrowserEventEmitter.setEnabled(true);148    CHILD.click();149    expect(LISTENER).toHaveBeenCalledTimes(1);150  });151  it('should bubble simply', () => {152    putListener(CHILD, ON_CLICK_KEY, recordID.bind(null, CHILD));153    putListener(PARENT, ON_CLICK_KEY, recordID.bind(null, PARENT));154    putListener(GRANDPARENT, ON_CLICK_KEY, recordID.bind(null, GRANDPARENT));155    CHILD.click();156    expect(idCallOrder.length).toBe(3);157    expect(idCallOrder[0]).toBe(CHILD);158    expect(idCallOrder[1]).toBe(PARENT);159    expect(idCallOrder[2]).toBe(GRANDPARENT);160  });161  it('should bubble to the right handler after an update', () => {162    putListener(GRANDPARENT, ON_CLICK_KEY, recordID.bind(null, 'GRANDPARENT'));163    putListener(PARENT, ON_CLICK_KEY, recordID.bind(null, 'PARENT'));164    putListener(CHILD, ON_CLICK_KEY, recordID.bind(null, 'CHILD'));165    CHILD.click();166    expect(idCallOrder).toEqual(['CHILD', 'PARENT', 'GRANDPARENT']);167    idCallOrder = [];168    // Update just the grand parent without updating the child.169    putListener(170      GRANDPARENT,171      ON_CLICK_KEY,172      recordID.bind(null, 'UPDATED_GRANDPARENT'),173    );174    CHILD.click();175    expect(idCallOrder).toEqual(['CHILD', 'PARENT', 'UPDATED_GRANDPARENT']);176  });177  it('should continue bubbling if an error is thrown', () => {178    putListener(CHILD, ON_CLICK_KEY, recordID.bind(null, CHILD));179    putListener(PARENT, ON_CLICK_KEY, function() {180      recordID(PARENT);181      throw new Error('Handler interrupted');182    });183    putListener(GRANDPARENT, ON_CLICK_KEY, recordID.bind(null, GRANDPARENT));184    expect(function() {185      ReactTestUtils.Simulate.click(CHILD);186    }).toThrow();187    expect(idCallOrder.length).toBe(3);188    expect(idCallOrder[0]).toBe(CHILD);189    expect(idCallOrder[1]).toBe(PARENT);190    expect(idCallOrder[2]).toBe(GRANDPARENT);191  });192  it('should set currentTarget', () => {193    putListener(CHILD, ON_CLICK_KEY, function(event) {194      recordID(CHILD);195      expect(event.currentTarget).toBe(CHILD);196    });197    putListener(PARENT, ON_CLICK_KEY, function(event) {198      recordID(PARENT);199      expect(event.currentTarget).toBe(PARENT);200    });201    putListener(GRANDPARENT, ON_CLICK_KEY, function(event) {202      recordID(GRANDPARENT);203      expect(event.currentTarget).toBe(GRANDPARENT);204    });205    CHILD.click();206    expect(idCallOrder.length).toBe(3);207    expect(idCallOrder[0]).toBe(CHILD);208    expect(idCallOrder[1]).toBe(PARENT);209    expect(idCallOrder[2]).toBe(GRANDPARENT);210  });211  it('should support stopPropagation()', () => {212    putListener(CHILD, ON_CLICK_KEY, recordID.bind(null, CHILD));213    putListener(214      PARENT,215      ON_CLICK_KEY,216      recordIDAndStopPropagation.bind(null, PARENT),217    );218    putListener(GRANDPARENT, ON_CLICK_KEY, recordID.bind(null, GRANDPARENT));219    CHILD.click();220    expect(idCallOrder.length).toBe(2);221    expect(idCallOrder[0]).toBe(CHILD);222    expect(idCallOrder[1]).toBe(PARENT);223  });224  it('should support overriding .isPropagationStopped()', () => {225    // Ew. See D4504876.226    putListener(CHILD, ON_CLICK_KEY, recordID.bind(null, CHILD));227    putListener(PARENT, ON_CLICK_KEY, function(e) {228      recordID(PARENT, e);229      // This stops React bubbling but avoids touching the native event230      e.isPropagationStopped = () => true;231    });232    putListener(GRANDPARENT, ON_CLICK_KEY, recordID.bind(null, GRANDPARENT));233    CHILD.click();234    expect(idCallOrder.length).toBe(2);235    expect(idCallOrder[0]).toBe(CHILD);236    expect(idCallOrder[1]).toBe(PARENT);237  });238  it('should stop after first dispatch if stopPropagation', () => {239    putListener(240      CHILD,241      ON_CLICK_KEY,242      recordIDAndStopPropagation.bind(null, CHILD),243    );244    putListener(PARENT, ON_CLICK_KEY, recordID.bind(null, PARENT));245    putListener(GRANDPARENT, ON_CLICK_KEY, recordID.bind(null, GRANDPARENT));246    CHILD.click();247    expect(idCallOrder.length).toBe(1);248    expect(idCallOrder[0]).toBe(CHILD);249  });250  it('should not stopPropagation if false is returned', () => {251    putListener(CHILD, ON_CLICK_KEY, recordIDAndReturnFalse.bind(null, CHILD));252    putListener(PARENT, ON_CLICK_KEY, recordID.bind(null, PARENT));253    putListener(GRANDPARENT, ON_CLICK_KEY, recordID.bind(null, GRANDPARENT));254    CHILD.click();255    expect(idCallOrder.length).toBe(3);256    expect(idCallOrder[0]).toBe(CHILD);257    expect(idCallOrder[1]).toBe(PARENT);258    expect(idCallOrder[2]).toBe(GRANDPARENT);259  });260  /**261   * The entire event registration state of the world should be "locked-in" at262   * the time the event occurs. This is to resolve many edge cases that come263   * about from a listener on a lower-in-DOM node causing structural changes at264   * places higher in the DOM. If this lower-in-DOM node causes new content to265   * be rendered at a place higher-in-DOM, we need to be careful not to invoke266   * these new listeners.267   */268  it('should invoke handlers that were removed while bubbling', () => {269    const handleParentClick = jest.fn();270    const handleChildClick = function(event) {271      deleteAllListeners(PARENT);272    };273    putListener(CHILD, ON_CLICK_KEY, handleChildClick);274    putListener(PARENT, ON_CLICK_KEY, handleParentClick);275    CHILD.click();276    expect(handleParentClick).toHaveBeenCalledTimes(1);277  });278  it('should not invoke newly inserted handlers while bubbling', () => {279    const handleParentClick = jest.fn();280    const handleChildClick = function(event) {281      putListener(PARENT, ON_CLICK_KEY, handleParentClick);282    };283    putListener(CHILD, ON_CLICK_KEY, handleChildClick);284    CHILD.click();285    expect(handleParentClick).toHaveBeenCalledTimes(0);286  });287  it('should have mouse enter simulated by test utils', () => {288    putListener(CHILD, ON_MOUSE_ENTER_KEY, recordID.bind(null, CHILD));289    ReactTestUtils.Simulate.mouseEnter(CHILD);290    expect(idCallOrder.length).toBe(1);291    expect(idCallOrder[0]).toBe(CHILD);292  });293  it('should listen to events only once', () => {294    spyOnDevAndProd(EventTarget.prototype, 'addEventListener');295    ReactBrowserEventEmitter.listenTo(ON_CLICK_KEY, document);296    ReactBrowserEventEmitter.listenTo(ON_CLICK_KEY, document);297    expect(EventTarget.prototype.addEventListener).toHaveBeenCalledTimes(1);298  });299  it('should work with event plugins without dependencies', () => {300    spyOnDevAndProd(EventTarget.prototype, 'addEventListener');301    ReactBrowserEventEmitter.listenTo(ON_CLICK_KEY, document);302    expect(EventTarget.prototype.addEventListener.calls.argsFor(0)[0]).toBe(...

ReactBrowserEventEmitter-test.js

Source: ReactBrowserEventEmitter-test.js

...108    document.body.removeChild(container);109    container = null;110  });111  it('should bubble simply', () => {112    putListener(CHILD, ON_CLICK_KEY, recordID.bind(null, CHILD));113    putListener(PARENT, ON_CLICK_KEY, recordID.bind(null, PARENT));114    putListener(GRANDPARENT, ON_CLICK_KEY, recordID.bind(null, GRANDPARENT));115    CHILD.click();116    expect(idCallOrder.length).toBe(3);117    expect(idCallOrder[0]).toBe(CHILD);118    expect(idCallOrder[1]).toBe(PARENT);119    expect(idCallOrder[2]).toBe(GRANDPARENT);120  });121  it('should bubble to the right handler after an update', () => {122    putListener(GRANDPARENT, ON_CLICK_KEY, recordID.bind(null, 'GRANDPARENT'));123    putListener(PARENT, ON_CLICK_KEY, recordID.bind(null, 'PARENT'));124    putListener(CHILD, ON_CLICK_KEY, recordID.bind(null, 'CHILD'));125    CHILD.click();126    expect(idCallOrder).toEqual(['CHILD', 'PARENT', 'GRANDPARENT']);127    idCallOrder = [];128    // Update just the grand parent without updating the child.129    putListener(130      GRANDPARENT,131      ON_CLICK_KEY,132      recordID.bind(null, 'UPDATED_GRANDPARENT'),133    );134    CHILD.click();135    expect(idCallOrder).toEqual(['CHILD', 'PARENT', 'UPDATED_GRANDPARENT']);136  });137  it('should continue bubbling if an error is thrown', () => {138    putListener(CHILD, ON_CLICK_KEY, recordID.bind(null, CHILD));139    putListener(PARENT, ON_CLICK_KEY, function() {140      recordID(PARENT);141      throw new Error('Handler interrupted');142    });143    putListener(GRANDPARENT, ON_CLICK_KEY, recordID.bind(null, GRANDPARENT));144    expect(function() {145      ReactTestUtils.Simulate.click(CHILD);146    }).toThrow();147    expect(idCallOrder.length).toBe(3);148    expect(idCallOrder[0]).toBe(CHILD);149    expect(idCallOrder[1]).toBe(PARENT);150    expect(idCallOrder[2]).toBe(GRANDPARENT);151  });152  it('should set currentTarget', () => {153    putListener(CHILD, ON_CLICK_KEY, function(event) {154      recordID(CHILD);155      expect(event.currentTarget).toBe(CHILD);156    });157    putListener(PARENT, ON_CLICK_KEY, function(event) {158      recordID(PARENT);159      expect(event.currentTarget).toBe(PARENT);160    });161    putListener(GRANDPARENT, ON_CLICK_KEY, function(event) {162      recordID(GRANDPARENT);163      expect(event.currentTarget).toBe(GRANDPARENT);164    });165    CHILD.click();166    expect(idCallOrder.length).toBe(3);167    expect(idCallOrder[0]).toBe(CHILD);168    expect(idCallOrder[1]).toBe(PARENT);169    expect(idCallOrder[2]).toBe(GRANDPARENT);170  });171  it('should support stopPropagation()', () => {172    putListener(CHILD, ON_CLICK_KEY, recordID.bind(null, CHILD));173    putListener(174      PARENT,175      ON_CLICK_KEY,176      recordIDAndStopPropagation.bind(null, PARENT),177    );178    putListener(GRANDPARENT, ON_CLICK_KEY, recordID.bind(null, GRANDPARENT));179    CHILD.click();180    expect(idCallOrder.length).toBe(2);181    expect(idCallOrder[0]).toBe(CHILD);182    expect(idCallOrder[1]).toBe(PARENT);183  });184  it('should support overriding .isPropagationStopped()', () => {185    // Ew. See D4504876.186    putListener(CHILD, ON_CLICK_KEY, recordID.bind(null, CHILD));187    putListener(PARENT, ON_CLICK_KEY, function(e) {188      recordID(PARENT, e);189      // This stops React bubbling but avoids touching the native event190      e.isPropagationStopped = () => true;191    });192    putListener(GRANDPARENT, ON_CLICK_KEY, recordID.bind(null, GRANDPARENT));193    CHILD.click();194    expect(idCallOrder.length).toBe(2);195    expect(idCallOrder[0]).toBe(CHILD);196    expect(idCallOrder[1]).toBe(PARENT);197  });198  it('should stop after first dispatch if stopPropagation', () => {199    putListener(200      CHILD,201      ON_CLICK_KEY,202      recordIDAndStopPropagation.bind(null, CHILD),203    );204    putListener(PARENT, ON_CLICK_KEY, recordID.bind(null, PARENT));205    putListener(GRANDPARENT, ON_CLICK_KEY, recordID.bind(null, GRANDPARENT));206    CHILD.click();207    expect(idCallOrder.length).toBe(1);208    expect(idCallOrder[0]).toBe(CHILD);209  });210  it('should not stopPropagation if false is returned', () => {211    putListener(CHILD, ON_CLICK_KEY, recordIDAndReturnFalse.bind(null, CHILD));212    putListener(PARENT, ON_CLICK_KEY, recordID.bind(null, PARENT));213    putListener(GRANDPARENT, ON_CLICK_KEY, recordID.bind(null, GRANDPARENT));214    CHILD.click();215    expect(idCallOrder.length).toBe(3);216    expect(idCallOrder[0]).toBe(CHILD);217    expect(idCallOrder[1]).toBe(PARENT);218    expect(idCallOrder[2]).toBe(GRANDPARENT);219  });220  /**221   * The entire event registration state of the world should be "locked-in" at222   * the time the event occurs. This is to resolve many edge cases that come223   * about from a listener on a lower-in-DOM node causing structural changes at224   * places higher in the DOM. If this lower-in-DOM node causes new content to225   * be rendered at a place higher-in-DOM, we need to be careful not to invoke226   * these new listeners.227   */228  it('should invoke handlers that were removed while bubbling', () => {229    const handleParentClick = jest.fn();230    const handleChildClick = function(event) {231      deleteAllListeners(PARENT);232    };233    putListener(CHILD, ON_CLICK_KEY, handleChildClick);234    putListener(PARENT, ON_CLICK_KEY, handleParentClick);235    CHILD.click();236    expect(handleParentClick).toHaveBeenCalledTimes(1);237  });238  it('should not invoke newly inserted handlers while bubbling', () => {239    const handleParentClick = jest.fn();240    const handleChildClick = function(event) {241      putListener(PARENT, ON_CLICK_KEY, handleParentClick);242    };243    putListener(CHILD, ON_CLICK_KEY, handleChildClick);244    CHILD.click();245    expect(handleParentClick).toHaveBeenCalledTimes(0);246  });247  it('should have mouse enter simulated by test utils', () => {248    putListener(CHILD, ON_MOUSE_ENTER_KEY, recordID.bind(null, CHILD));249    ReactTestUtils.Simulate.mouseEnter(CHILD);250    expect(idCallOrder.length).toBe(1);251    expect(idCallOrder[0]).toBe(CHILD);252  });...

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch({ headless: false });4  const context = await browser.newContext();5  const page = await context.newPage();6  await page.putListener('request', 'request', (request) => {7    console.log('Request url: ' + request.url());8  });9  await page.click('text=Get started');10  await page.waitForTimeout(1000);11  await browser.close();12})();13await page.removeListener('request', 'request');

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  await page.setRequestInterception(true);7  page.on('request', request => {8    console.log('request.url', request.url());9    request.continue();10  });11  page.on('response', response => {12    console.log('response.url', response.url());13  });14  await browser.close();15})();

Using AI Code Generation

1const playwright = require("playwright");2(async () => {3  const browser = await playwright["chromium"].launch({4  });5  const context = await browser.newContext();6  const page = await context.newPage();7  const client = await page.context().newCDPSession(page);8  await client.send("Fetch.enable", {9    patterns: [{ urlPattern: "*", requestStage: "Request" }],10  });11  client.on("Fetch.requestPaused", async (event) => {12    console.log(event);13    await client.send("Fetch.continueRequest", {14    });15  });16})();17const playwright = require("playwright");18(async () => {19  const browser = await playwright["chromium"].launch({20  });21  const context = await browser.newContext();22  const page = await context.newPage();23  const client = await page.context().newCDPSession(page);24  await client.send("Fetch.enable", {25    patterns: [{ urlPattern: "*", requestStage: "Request" }],26  });27  client.on("Fetch.requestPaused", async (event) => {28    console.log(event);29    await client.send("Fetch.continueRequest", {30    });31  });32})();33const playwright = require("playwright");34(async () => {35  const browser = await playwright["chromium"].launch({36  });37  const context = await browser.newContext();38  const page = await context.newPage();39  const client = await page.context().newCDPSession(page);40  await client.send("Fetch.enable", {41    patterns: [{ urlPattern: "*", requestStage: "Request" }],42  });43  client.on("Fetch.requestPaused", async (event) => {44    console.log(event);45    await client.send("Fetch.continueRequest", {46    });47  });48})();

Using AI Code Generation

1const { chromium } = require('playwright');2const { putListener } = require('playwright/lib/server/supplements/recorder/recorderSupplement');3(async () => {4  const browser = await chromium.launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  await putListener(page, 'test');

Using AI Code Generation

1const { putListener } = require('playwright/lib/server/browserContext');2const { createPage } = require('playwright/lib/server/browser');3putListener('page', createPage, (page) => {4    page.on('console', (msg) => {5        console.log('Page emitted console event: ', msg.text());6    });7});8putListener('browser', createBrowser, (browser) => {9    browser.on('disconnected', () => {10        console.log('Browser emitted disconnected event');11    });12});13putListener('browserContext', createBrowserContext, (browserContext) => {14    browserContext.on('page', (page) => {15        console.log('BrowserContext emitted page event');16    });17});18putListener('browserServer', createBrowserServer, (browserServer) => {19    browserServer.on('close', () => {20        console.log('BrowserServer emitted close event');21    });22});23putListener('server', createServer, (server) => {24    server.on('request', (request) => {25        console.log('Server emitted request event: ', request.url());26    });27});28putListener('route', createRoute, (route) => {29    route.fulfill({30    });31});32putListener('frame', createFrame, (frame) => {33    frame.on('load', () => {34        console.log('Frame emitted load event');35    });36});37putListener('request', createRequest, (request) => {38    request.on('response', (response) => {39        console.log('Request emitted response event');40    });41});42putListener('download', createDownload, (download) => {43    download.on('download', (download) => {44        console.log('Download emitted download event');45    });46});

Using AI Code Generation

1const { _electron } = require('playwright');2const { app } = require('electron');3const { putListener } = _electron;4putListener('ready', () => {5  console.log('App is ready');6});7app.on('ready', () => {8  console.log('App is ready');9});10const { test, expect } = require('@playwright/test');11const { app } = require('electron');12test('App is ready', async ({ page }) => {13  const appReady = await page.evaluate(() => {14    return new Promise((resolve) => {15      app.on('ready', () => {16        resolve(true);17      });18    });19  });20  expect(appReady).toBe(true);21});

Using AI Code Generation

1const { putListener } = require('@playwright/test/lib/server/listeners');2putListener('myListener', (event) => {3  console.log('Received event: ', event);4});5const { getListener } = require('@playwright/test/lib/server/listeners');6const listener = getListener('myListener');7await listener('myEvent');8const { removeListener } = require('@playwright/test/lib/server/listeners');9removeListener('myListener');10const { getListeners } = require('@playwright/test/lib/server/listeners');11const listeners = getListeners();12await listeners['myListener']('myEvent');13const { getListeners } = require('@playwright/test/lib/server/listeners');14const listeners = getListeners();15await listeners['myListener']('myEvent');16const { removeAllListeners } = require('@playwright/test/lib/server/listeners');17removeAllListeners();18const { getListenerCount } = require('@playwright/test/lib/server/listeners');19const count = getListenerCount();20console.log(count);21const { getListenerCount } = require('@playwright/test/lib/server/listeners');22const count = getListenerCount();23console.log(count);24const { getListenerCount } = require('@playwright/test/lib/server/listeners');25const count = getListenerCount();26console.log(count);27const { getListenerCount } = require('@playwright/test/lib/server/listeners');28const count = getListenerCount();29console.log(count);30const { getListenerCount } = require('@playwright/test/lib/server/listeners');31const count = getListenerCount();32console.log(count);33const { getListenerCount } = require('@playwright/test/lib/server/listeners');34const count = getListenerCount();35console.log(count);

Using AI Code Generation

1const { putListener } = require('playwright/lib/client/helper');2const { chromium } = require('playwright');3(async () => {4  const browser = await chromium.launch();5  const page = await browser.newPage();6  await putListener(page, 'request', (request) => {7    console.log('Request: ', request.url());8  });9  await page.click('text=Images');10  await browser.close();11})();12{13  "scripts": {14  },15  "dependencies": {16  }17}

Using AI Code Generation

1const { putListener } = require('playwright/lib/server/browserContext');2putListener('targetcreated', (target) => {3  console.log(target.url());4});5const { putListener } = require('playwright/lib/server/browserContext');6putListener('targetcreated', (target) => {7  console.log(target.url());8});9const { putListener } = require('playwright/lib/server/browserContext');10putListener('targetcreated', (target) => {11  console.log(target.url());12});13const { putListener } = require('playwright/lib/server/browserContext');14putListener('targetcreated', (target) => {15  console.log(target.url());16});17const { putListener } = require('playwright/lib/server/browserContext');18putListener('targetcreated', (target) => {19  console.log(target.url());20});21const { putListener } = require('playwright/lib/server/browserContext');22putListener('targetcreated', (target) => {23  console.log(target.url());24});25const { putListener } = require('playwright/lib/server/browserContext');26putListener('targetcreated', (target) => {27  console.log(target.url());28});29const { putListener } = require('playwright/lib/server/browserContext');30putListener('targetcreated', (target) => {31  console.log(target.url());32});

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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

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

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

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

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

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LambdaTest’s Playwright tutorial will give you a broader idea about the Playwright automation framework, its unique features, and use cases with examples to exceed your understanding of Playwright testing. This tutorial will give A to Z guidance, from installing the Playwright framework to some best practices and advanced concepts.

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