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How to use trimEnd method in Playwright Internal

Best JavaScript code snippet using playwright-internal

data.mjs

...74function saveArticle(article, config) {75  console.log("converting article", article.slug)76  const contents = (article) => `77---78title: ${yaml.dump(article.title).trimEnd()}79excerpt: ${yaml.dump(article.description, { lineWidth: 500 }).trimEnd()}80image: 81  ${yaml.dump([article.image.hash]).trimEnd()}82published_at: ${yaml.dump(article.publishedAt).trimEnd()}83updated_at: ${yaml.dump(article.updated_at).trimEnd()}84status: ${yaml.dump(article.status).trimEnd()}85featured: ${yaml.dump(article.featured).trimEnd()}86category: 87  ${yaml.dump([article.category.slug]).trimEnd()}88author: 89  ${yaml.dump([article.author.slug]).trimEnd()}90seo:91  metaTitle: ${yaml.dump(article.seo.metaTitle).trimEnd()}92  metaDescription: ${yaml.dump(article.seo.metaDescription, { lineWidth: 500 }).trimEnd()}93share_image: ${yaml.dump(article.seo.shareImage.hash).trimEnd()}94tags:95  ${article.tags.length ? yaml.dump(article.tags.map((t) => t.slug)).trimEnd() : ``}96---97${article.content}98  `99  const articleConfig = config[article.category.slug];100  const fileName = path.join(articleConfig.contentPath, article.slug + ".mdx")101  // create the target directory if it doesn't exist 102  if (!fs.existsSync(articleConfig.contentPath)) {103    fs.mkdirSync(articleConfig.contentPath);104  }105  // write the contents106  fs.writeFileSync(fileName, contents(article).trim());107  saveImage(article.image, config["image"])108  saveImage(article.seo.shareImage, config["shareImage"])109}110function saveWriter(writer, config) {111  console.log("converting writer", writer.slug)112  const contents = (writer) => `113---114name: ${yaml.dump(writer.name).trimEnd()}115bio: ${yaml.dump(writer.bio).trimEnd()}116email: ${yaml.dump(writer.email).trimEnd()}117twitter: ${yaml.dump(writer.twitter).trimEnd()}118youtube: ${yaml.dump(writer.youtube).trimEnd()}119github: ${yaml.dump(writer.github).trimEnd()}120linkedin: ${yaml.dump(writer.linkedin).trimEnd()}121jobtitle: ${yaml.dump(writer.jobtitle).trimEnd()}122company: ${yaml.dump(writer.company).trimEnd()}123picture: 124  ${yaml.dump([writer.picture.hash]).trimEnd()}125avatar: 126  ${yaml.dump([writer.avatar.hash]).trimEnd()}127---`128  const writerConfig = config["author"];129  const fileName = path.join(writerConfig.contentPath, writer.slug + ".mdx")130  // create the target directory if it doesn't exist 131  if (!fs.existsSync(writerConfig.contentPath)) {132    fs.mkdirSync(articleConfig.contentPath);133  }134  // write the contents135  fs.writeFileSync(fileName, contents(writer).trim());136  saveImage(writer.picture, config["picture"])137  saveImage(writer.avatar, config["avatar"])138}139function saveCategory(category, config) {140  console.log("converting category", category.slug)141  const contents = (category) => `142---143name: ${yaml.dump(category.name).trimEnd()}144plural: ${yaml.dump(category.plural).trimEnd()}145navigation: ${yaml.dump(category.navigation).trimEnd()}146---`147  const categoryConfig = config["category"];148  const fileName = path.join(categoryConfig.contentPath, category.slug + ".mdx")149  // create the target directory if it doesn't exist 150  if (!fs.existsSync(categoryConfig.contentPath)) {151    fs.mkdirSync(categoryConfig.contentPath);152  }153  // write the contents154  fs.writeFileSync(fileName, contents(category).trim());...

shimmed.js

Source: shimmed.js

...18		et.end();19	});20	var supportsStrictMode = (function () { return typeof this === 'undefined'; }());21	t.test('bad string/this value', { skip: !supportsStrictMode }, function (st) {22		st['throws'](function () { return trimEnd(undefined, 'a'); }, TypeError, 'undefined is not an object');23		st['throws'](function () { return trimEnd(null, 'a'); }, TypeError, 'null is not an object');24		st.end();25	});26	runTests(bind.call(Function.call, String.prototype.trimEnd), t);27	t.end();...

this-value-number.js

Source: this-value-number.js

1// Copyright (c) 2017 Valerie Young.  All rights reserved.2// This code is governed by the BSD license found in the LICENSE file.3/*---4esid: sec-string.prototype.trimEnd5description: Behavoir when "this" value is a number.6info: |7  Runtime Semantics: TrimString ( string, where )8  2. Let S be ? ToString(str).9  ToString ( argument )10  Argument Type: Number11  Result: NumberToString(argument)12features: [string-trimming, String.prototype.trimEnd]13---*/14var trimEnd = String.prototype.trimEnd15assert.sameValue(16  trimEnd.call(NaN),17  'NaN',18  'String.prototype.trimEnd.call(NaN)'19);20assert.sameValue(21  trimEnd.call(Infinity),22  'Infinity',23  'String.prototype.trimEnd.call(Infinity)'24);25assert.sameValue(26  trimEnd.call(-0),27  '0',28  'String.prototype.trimEnd.call(-0)'29);30assert.sameValue(31  trimEnd.call(1),32  '1',33  'String.prototype.trimEnd.call(1)'34);35assert.sameValue(36  trimEnd.call(-1),37  '-1',38  'String.prototype.trimEnd.call(-1)'39);...

es.string.trim-end.js

Source: es.string.trim-end.js

2var $ = require('../internals/export');3var $trimEnd = require('../internals/string-trim').end;4var forcedStringTrimMethod = require('../internals/string-trim-forced');5var FORCED = forcedStringTrimMethod('trimEnd');6var trimEnd = FORCED ? function trimEnd() {7  return $trimEnd(this);8// eslint-disable-next-line es/no-string-prototype-trimstart-trimend -- safe9} : ''.trimEnd;10// `String.prototype.{ trimEnd, trimRight }` methods11// https://tc39.es/ecma262/#sec-string.prototype.trimend12// https://tc39.es/ecma262/#String.prototype.trimright13$({ target: 'String', proto: true, forced: FORCED }, {14  trimEnd: trimEnd,15  trimRight: trimEnd...

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.screenshot({ path: `example.png` });7    await browser.close();8})();9This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details

Using AI Code Generation

1const { test, expect } = require('@playwright/test');2test('trimEnd', async ({ page }) => {3  const title = await page.title();4  expect(title.trimEnd()).toBe('Playwright');5});6const { test, expect } = require('@playwright/test');7test('trimEnd', async ({ page }) => {8  const title = await page.title();9  expect(title.trimEnd()).toBe('Playwright');10});11const { test, expect } = require('@playwright/test');12test('trimEnd', async ({ page }) => {13  const title = await page.title();14  expect(title.trimEnd()).toBe('Playwright');15});16const { test, expect } = require('@playwright/test');17test('trimEnd', async ({ page }) => {18  const title = await page.title();19  expect(title.trimEnd()).toBe('Playwright');20});21const { test, expect } = require('@playwright/test');22test('trimEnd', async ({ page }) => {23  const title = await page.title();24  expect(title.trimEnd()).toBe('Playwright');25});26const { test, expect } = require('@playwright/test');27test('trimEnd', async ({ page }) => {28  const title = await page.title();29  expect(title.trimEnd()).toBe('Playwright');30});31const { test, expect } = require('@playwright/test');32test('trimEnd', async ({ page }) => {33  const title = await page.title();34  expect(title.trimEnd()).toBe('Playwright');35});36const { test, expect } = require('@playwright/test');37test('trimEnd', async ({ page }) => {38  await page.goto('

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.click('text=Docs');6    await page.click('text=API');7    await page.click('text=class: Page');8    await page.click('text=click');9    await page.click('text=Parameters');10    await page.click('t

Using AI Code Generation

1const { chromium } = require("playwright");2(async () => {3  const browser = await chromium.launch();4  const page = await browser.newPage();5  const title = await page.title();6  console.log(title);7  await browser.close();8})();9const { chromium } = require("playwright");10(async () => {11  const browser = await chromium.launch();12  const page = await browser.newPage();13  const title = await page.title();14  console.log(title);15  await browser.close();16})();17const { chromium } = require("playwright");18(async () => {19  const browser = await chromium.launch();20  const page = await browser.newPage();21  await page.type("input[title='Search']", "Hello World");22  await page.screenshot({ path: "google.png" });23  await browser.close();24})();25const { chromium } = require("playwright");26(async () => {27  const browser = await chromium.launch({ headless: false });28  const page = await browser.newPage();29  await page.check("input[type='checkbox']");30  await page.screenshot({ path: "google.png" });31  await browser.close();32})();33const { chromium } = require("playwright");34(async () => {35  const browser = await chromium.launch({ headless: false });36  const page = await browser.newPage();37  const unroute = page.route("**/*.{png,jpg,jpeg}", (route) => route.abort());38  await page.screenshot({ path: "google.png" });39  await unroute();40  await page.screenshot({ path: "google.png" });

Using AI Code Generation

1const { test, expect } = require('@playwright/test');2test('My test', async ({ page }) => {3  const title = page.locator('text=Test your selectors');4  await expect(title).toHaveText('Test your selectors');5  const titleText = await title.innerText();6  console.log(titleText.trimEnd());7});8const { test, expect } = require('@playwright/test');9test('My test', async ({ page }) => {10  const title = page.locator('text=Test your selectors');11  await expect(title).toHaveText('Test your selectors');12  const titleText = await title.innerText();13  console.log(titleText.trimStart());14});15const { test, expect } = require('@playwright/test');16test('My test', async ({ page }) => {17  const title = page.locator('text=Test your selectors');18  await expect(title).toHaveText('Test your selectors');19  const titleText = await title.innerText();20  console.log(titleText.toLowerCase());21});22const { test, expect } = require('@playwright/test');23test('My test', async ({ page }) => {24  const title = page.locator('text=Test your selectors');25  await expect(title).toHaveText('Test your selectors');26  const titleText = await title.innerText();27  console.log(titleText.toUpperCase());28});29const {

Using AI Code Generation

1const {helper} = require('@playwright/test');2const str = '   hello world   ';3console.log(helper.trimEnd(str));4const {helper} = require('@playwright/test');5const str = '   hello world   ';6console.log(helper.trimStart(str));7const {helper} = require('@playwright/test');8const { EventEmitter } = require('events');9const ee = new EventEmitter();10setTimeout(() => ee.emit('foo', 42), 1000);11const result = await helper.waitForEvent(ee, 'foo');12const {helper} = require('@playwright/test');13const { EventEmitter } = require('events');14const ee = new EventEmitter();15setTimeout(() => ee.emit('foo', 42), 1000);16for await (const result of helper.waitForEventAsyncIterator(ee, 'foo'))17const {helper} = require('@playwright/test');18const { EventEmitter } = require('events');19const ee = new EventEmitter();20setTimeout(() => ee.emit('foo', 42), 1000);21const result = await helper.waitForNextEvent(ee, 'foo');

Using AI Code Generation

1const { InternalCallMetadata } = require('playwright-core/lib/transport/sessions');2const { context } = require('playwright-core/lib/server/chromium/crBrowser');3const { chromium } = require('playwright-core');4const { test, expect } = require('@playwright/test');5test('Playwright Internal API', async ({ page }) => {6    const title = await page.textContent('.navbar__inner .navbar__title');7    expect(title).toBe('Playwright');8    const internalCallMetadata = new InternalCallMetadata();9    const internalContext = await context._createContext(internalCallMetadata);10    const internalPage = await internalContext.newPage(internalCallMetadata);11    const internalTitle = await internalPage.textContent('.navbar__inner .navbar__title');12    expect(internalTitle).toBe('Playwright');13    expect(internalTitle.trimEnd()).toBe('Playwright');14});

StackOverFlow community discussions

Questions

Discussion

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

firefox browser does not start in playwright

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

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

firefox browser does not start in playwright

Running Playwright in Azure Function

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

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

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

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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