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How to use createForEach method in Playwright Internal

Best JavaScript code snippet using playwright-internal

forEachRight.js

...19 *   console.log(n);20 * }).value();21 * // => logs each value from right to left and returns the array22 */23var forEachRight = createForEach(arrayEachRight, baseEachRight);...

forEach.js

Source: forEach.js

1/* */ 2var arrayEach = require('../internal/arrayEach'),3    baseEach = require('../internal/baseEach'),4    createForEach = require('../internal/createForEach');5var forEach = createForEach(arrayEach, baseEach);...

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  const links = await page.$$('text=Get started');7  const forEach = links.createForEach();8  await forEach(async link => {9    await link.click();10    await page.waitForLoadState();11    await page.goBack();12  });13  await browser.close();14})();15const { chromium } = require('playwright');16(async () => {17  const browser = await chromium.launch();18  const context = await browser.newContext();19  const page = await context.newPage();20  const links = await page.$$('text=Get started');21  const forEach = links.createForEach();22  await forEach(async link => {23    await link.click();24    await page.waitForLoadState();25    await page.goBack();26  });27  await browser.close();28})();29const { chromium } = require('playwright');30(async () => {31  const browser = await chromium.launch();32  const context = await browser.newContext();33  const page = await context.newPage();34  const links = await page.$$('text=Get started');35  const forEach = links.createForEach();36  await forEach(async link => {37    await link.click();38    await page.waitForLoadState();39    await page.goBack();40  });41  await browser.close();42})();43const { chromium } = require('playwright');44(async () => {45  const browser = await chromium.launch();46  const context = await browser.newContext();47  const page = await context.newPage();48  const links = await page.$$('text=Get started');49  const forEach = links.createForEach();50  await forEach(async link => {51    await link.click();52    await page.waitForLoadState();53    await page.goBack();54  });55  await browser.close();56})();57const { chromium } =

Using AI Code Generation

1const { createForEach } = require('playwright/lib/utils/async');2const { chromium } = require('playwright');3(async () => {4  const browser = await chromium.launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  const forEach = createForEach();8  await forEach([1, 2, 3], async (i) => {9  });10  await browser.close();11})();12const { createForEach } = require('playwright/lib/utils/async');13const { chromium } = require('playwright');14(async () => {15  const browser = await chromium.launch();16  const context = await browser.newContext();17  const page = await context.newPage();18  const forEach = createForEach();19  await forEach([1, 2, 3], async (i) => {20  });21  await browser.close();22})();23const { createForEach } = require('playwright/lib/utils/async');24const { chromium } = require('playwright');25(async () => {26  const browser = await chromium.launch();27  const context = await browser.newContext();28  const page = await context.newPage();29  const forEach = createForEach();30  await forEach([1, 2, 3], async (i) => {31  });32  await browser.close();33})();34const { createForEach } = require('playwright/lib/utils/async');35const { chromium } = require('playwright');36(async () => {37  const browser = await chromium.launch();38  const context = await browser.newContext();39  const page = await context.newPage();40  const forEach = createForEach();41  await forEach([1, 2, 3], async (i) => {42  });43  await browser.close();44})();45const { createForEach } = require('playwright/lib/utils/async');46const {

Using AI Code Generation

1const { createForEach } = require('playwright/lib/utils/async');2const { chromium } = require('playwright');3(async () => {4  const browser = await chromium.launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  const forEach = createForEach(page);8  await forEach([1, 2, 3], async (i) => {9    await page.click(`text=Get started >> nth=${i}`);10    await page.waitForSelector(`text=Get started >> nth=${i + 1}`);11  });12  await browser.close();13})();

Using AI Code Generation

1const { createForEach } = require('@playwright/test');2const { chromium } = require('playwright');3const { createForEach } = require('@playwright/test');4const { chromium } = require('playwright');5const forEach = createForEach([chromium, firefox, webkit]);6const { createForEach } = require('@playwright/test');7const { chromium } = require('playwright');8const forEach = createForEach([chromium, firefox, webkit]);9const { createForEach } = require('@playwright/test');10const { chromium } = require('playwright');11const forEach = createForEach([chromium, firefox, webkit]);12const { createForEach } = require('@playwright/test');13const { chromium } = require('playwright');14const forEach = createForEach([chromium, firefox, webkit]);15const { createForEach } = require('@playwright/test');16const { chromium } = require('playwright');17const forEach = createForEach([chromium, firefox, webkit]);18const { createForEach } = require('@playwright/test');19const { chromium } = require('playwright');20const forEach = createForEach([chromium, firefox, webkit]);21const { createForEach } = require('@playwright/test');22const { chromium } = require('playwright');23const forEach = createForEach([chromium, firefox, webkit]);24const { createForEach } = require('@playwright/test');25const { chromium } = require('playwright');26const forEach = createForEach([chromium, firefox, webkit]);27const { createForEach } = require('@playwright/test');28const { chromium } = require('playwright');29const forEach = createForEach([chromium, firefox, webkit]);30const { createForEach } = require('@playwright/test');31const { chromium } = require('playwright

Using AI Code Generation

1const { Playwright } = require('@playwright/test');2const playwright = Playwright.create();3const browser = await playwright.chromium.launch();4const page = await browser.newPage();5await page.screenshot({ path: 'example.png' });6await browser.close();7const { test, expect } = require('@playwright/test');8test('basic test', async ({ page }) => {9  const title = page.locator('.navbar__inner .navbar__title');10  await expect(title).toHaveText('Playwright');11});12import { test, expect } from '@playwright/test';13test('basic test', async ({ page }) => {14  const title = page.locator('.navbar__inner .navbar__title');15  await expect(title).toHaveText('Playwright');16});17import { PlaywrightTestConfig } from '@playwright/test';18const config: PlaywrightTestConfig = {19    {20      use: {21      },22    },23};24export default config;25{26  "scripts": {27  },28  "devDependencies": {29  }30}31{32}33module.exports = {34  env: {35  },36  parserOptions: {

Using AI Code Generation

1const { createForEach } = require('@playwright/test');2const fs = require('fs');3const path = require('path');4const { chromium } = require('playwright');5const { expect } = require('chai');6const forEach = createForEach(test => {7  test.setTimeout(60000);8  test.use({ storageState: 'storage-state.json' });9});10forEach.fixtures('browser', async ({}, use) => {11  const browser = await chromium.launch();12  await use(browser);13  await browser.close();14});15forEach.fixtures('context', async ({ browser }, use) => {16  const context = await browser.newContext();17  await use(context);18  await context.close();19});20forEach.fixtures('page', async ({ context }, use) => {21  const page = await context.newPage();22  await use(page);23});24forEach('test1', async ({ page }) => {25  await page.waitForSelector('text=Get started');26  await page.click('text=Get started');27  await page.waitForSelector('text=Example');28  await page.click('text=Example');29  await page.waitForSelector('text=Example: Google Search');30  await page.click('text=Example: Google Search');31  await page.waitForSelector('text=Google Search');32  await page.click('text=Google Search');33  await page.waitForSelector('text=Playwright');34  await page.click('text=Playwright');35  await page.waitForSelector('text=Playwright is a Node library to automate Chromium, Firefox and WebKit with a single API.');36  await page.click('text=Playwright is a Node library to automate Chromium, Firefox and WebKit with a single API.');37  await page.waitForSelector('text=Playwright');38  await page.click('text=Playwright');39  await page.waitForSelector('text=Playwright is a Node library to automate Chromium, Firefox and WebKit with a single API.');40  await page.click('text=Playwright is a Node library to automate Chromium, Firefox and WebKit with a single API.');41  await page.waitForSelector('text=Playwright');42  await page.click('text=Playwright');43  await page.waitForSelector('text=Playwright is a Node library to automate Chromium, Firefox and WebKit with a single API.');44  await page.click('text=Playwright is a Node library to automate Chromium, Firefox and WebKit with a single

Using AI Code Generation

1const { createForEach } = require('@playwright/test/lib/test');2const { test } = require('@playwright/test');3const { chromium } = require('playwright');4const { expect } = require('chai');5const forEach = createForEach([chromium]);6forEach.describe('Test', () => {7  forEach.test('Test', async ({ page }) => {8    const title = page.locator('text=Playwright');9    await expect(await title.isVisible()).to.be.true;10  });11});12module.exports = {13  use: {14    viewport: { width: 1280, height: 720 },15  },16};17{18  "scripts": {19  },20  "devDependencies": {21  }22}23      at Object.<anonymous> (test.js:18:7)24      at step (test.js:33:23)25      at Object.next (test.js:14:53)26      at fulfilled (test.js:5:58)27      at processTicksAndRejections (internal/process/task_queues.js:93:5)

Using AI Code Generation

1const { createForEach } = require('playwright/lib/server/chromium/crBrowser');2const { chromium } = require('playwright');3const forEach = createForEach(chromium);4const context = await chromium.launchPersistentContext('userDataDir', { headless: false });5const page = await forEach(context.pages(), async (page) => {6  return page;7});8const frame = await forEach(page.frames(), async (frame) => {9  return frame;10});11const worker = await forEach(context.serviceWorkers(), async (worker) => {12  return worker;13});14const route = await forEach(context.route('**/*'), async (route) => {15  return route;16});17const request = await forEach(page.route('**/*'), async (route) => {18  return route.request();19});20const response = await forEach(page.route('**/*'), async (route) => {21  return route.request().response();22});23const consoleMessage = await forEach(page.route('**/*'), async (route) => {24  return route.request().response().frame().consoleMessages()[0];25});26const dialog = await forEach(page.route('**/*'), async (route) => {27  return route.request().response().frame().waitForEvent('dialog');28});29const download = await forEach(page.route('**/*'), async (route) => {30  return route.request().response().frame().waitForEvent('download');31});32const fileChooser = await forEach(page.route('**/*'), async (route) => {33  return route.request().response().frame().waitForEvent('filechooser');34});35const request = await forEach(page.route('**/*'), async (route) => {36  return route.request().response().frame().waitForEvent('request');37});

Using AI Code Generation

1const { chromium } = require('playwright');2const { createForEach } = require('playwright/lib/utils/parallel');3  { name: 'John', age: 20 },4  { name: 'Jane', age: 21 },5  { name: 'Jack', age: 22 },6];7const run = async () => {8  const browser = await chromium.launch();9  const context = await browser.newContext();10  await createForEach(data, async (data) => {11    const page = await context.newPage();12    await page.screenshot({ path: `example-${data.name}.png` });13  });14  await browser.close();15};16run();

StackOverFlow community discussions

Questions

Discussion

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

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

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

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

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

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