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How to use isSelectorClauseEnd method in Playwright Internal

Best JavaScript code snippet using playwright-internal

cssParser.js

...74  }75  function isClauseCombinator(p = pos) {76    return tokens[p] instanceof css.DelimToken && ['>', '+', '~'].includes(tokens[p].value);77  }78  function isSelectorClauseEnd(p = pos) {79    return isComma(p) || isCloseParen(p) || isEOF(p) || isClauseCombinator(p) || tokens[p] instanceof css.WhitespaceToken;80  }81  function consumeFunctionArguments() {82    const result = [consumeArgument()];83    while (true) {84      skipWhitespace();85      if (!isComma()) break;86      pos++;87      result.push(consumeArgument());88    }89    return result;90  }91  function consumeArgument() {92    skipWhitespace();93    if (isNumber()) return tokens[pos++].value;94    if (isString()) return tokens[pos++].value;95    return consumeComplexSelector();96  }97  function consumeComplexSelector() {98    const result = {99      simples: []100    };101    skipWhitespace();102    if (isClauseCombinator()) {103      // Put implicit ":scope" at the start. https://drafts.csswg.org/selectors-4/#absolutize104      result.simples.push({105        selector: {106          functions: [{107            name: 'scope',108            args: []109          }]110        },111        combinator: ''112      });113    } else {114      result.simples.push({115        selector: consumeSimpleSelector(),116        combinator: ''117      });118    }119    while (true) {120      skipWhitespace();121      if (isClauseCombinator()) {122        result.simples[result.simples.length - 1].combinator = tokens[pos++].value;123        skipWhitespace();124      } else if (isSelectorClauseEnd()) {125        break;126      }127      result.simples.push({128        combinator: '',129        selector: consumeSimpleSelector()130      });131    }132    return result;133  }134  function consumeSimpleSelector() {135    let rawCSSString = '';136    const functions = [];137    while (!isSelectorClauseEnd()) {138      if (isIdent() || isStar()) {139        rawCSSString += tokens[pos++].toSource();140      } else if (tokens[pos] instanceof css.HashToken) {141        rawCSSString += tokens[pos++].toSource();142      } else if (tokens[pos] instanceof css.DelimToken && tokens[pos].value === '.') {143        pos++;144        if (isIdent()) rawCSSString += '.' + tokens[pos++].toSource();else throw unexpected();145      } else if (tokens[pos] instanceof css.ColonToken) {146        pos++;147        if (isIdent()) {148          if (!customNames.has(tokens[pos].value.toLowerCase())) {149            rawCSSString += ':' + tokens[pos++].toSource();150          } else {151            const name = tokens[pos++].value.toLowerCase();...

Using AI Code Generation

1const { isSelectorClauseEnd } = require('@playwright/test/lib/utils').internalAPI;2const { isSelectorClauseEnd } = require('@playwright/test/lib/utils').internalAPI;3const { isSelectorClauseEnd } = require('@playwright/test/lib/utils').internalAPI;4const { isSelectorClauseEnd } = require('@playwright/test/lib/utils').internalAPI;5const { isSelectorClauseEnd } = require('@playwright/test/lib/utils').internalAPI;6const { isSelectorClauseEnd } = require('@playwright/test/lib/utils').internalAPI;7const { isSelectorClauseEnd } = require('@playwright/test/lib/utils').internalAPI;8const { isSelectorClauseEnd } = require('@playwright/test/lib/utils').internalAPI;9const { isSelectorClauseEnd } = require('@playwright/test/lib/utils').internalAPI;10const { isSelectorClauseEnd } = require('@playwright/test/lib/utils').internalAPI;11const { isSelectorClauseEnd } = require('@playwright/test/lib/utils').internalAPI;12const { isSelectorClauseEnd } = require('@playwright/test/lib/utils').internalAPI;13const { isSelectorClauseEnd } = require('@playwright/test/lib/utils').internalAPI;14const { isSelectorClauseEnd } = require('@playwright/test/lib/utils').internalAPI;15const { isSelectorClauseEnd } = require('@playwright/test/lib/utils').internalAPI;

Using AI Code Generation

1const { isSelectorClauseEnd } = require('playwright/lib/server/frames');2const { isSelectorClauseEnd } = require('playwright/lib/server/frames');3const { isSelectorClauseEnd } = require('playwright/lib/server/frames');4const { isSelectorClauseEnd } = require('playwright/lib/server/frames');5const { isSelectorClauseEnd } = require('playwright/lib/server/frames');6const { isSelectorClauseEnd } = require('playwright/lib/server/frames');7const { isSelectorClauseEnd } = require('playwright/lib/server/frames');8const { isSelectorClauseEnd } = require('playwright/lib/server/frames');9const { isSelectorClauseEnd } = require('playwright/lib/server/frames');10const { isSelectorClauseEnd } = require('playwright/lib/server/frames');11const { isSelectorClauseEnd } = require('playwright/lib/server/frames');12const { isSelectorClauseEnd } = require('playwright/lib/server/frames');13const { isSelectorClauseEnd } = require('playwright/lib/server/frames');14const { isSelectorClauseEnd } = require('playwright/lib/server/frames');15const { isSelectorClauseEnd } = require('playwright/lib/server/frames');16const { isSelectorClauseEnd } = require('playwright/lib/server/frames');17const { isSelectorClauseEnd } = require('playwright/lib/server/frames');18const { isSelectorClauseEnd } = require('playwright/lib/server/frames');19const { isSelectorClauseEnd } = require('playwright/lib/server/frames');20const { isSelectorClauseEnd } = require('playwright/lib/server/frames');21const { isSelectorClauseEnd }

Using AI Code Generation

1const { isSelectorClauseEnd } = require('@playwright/test/lib/server/selectorParser');2const { assert } = require('chai');3const { test, expect } = require('@playwright/test');4test('selector parser', () => {5  expect(isSelectorClauseEnd('>>')).toBe(true);6  expect(isSelectorClauseEnd('>>.')).toBe(true);7  expect(isSelectorClauseEnd('>>.foo')).toBe(false);8  expect(isSelectorClauseEnd('>>#foo')).toBe(false);9  expect(isSelectorClauseEnd('>>[foo]')).toBe(false);10  expect(isSelectorClauseEnd('>>[foo="bar"]')).toBe(false);11  expect(isSelectorClauseEnd('>>[foo^="bar"]')).toBe(false);12  expect(isSelectorClauseEnd('>>[foo$="bar"]')).toBe(false);13  expect(isSelectorClauseEnd('>>[foo*="bar"]')).toBe(false);14  expect(isSelectorClauseEnd('>>[foo~="bar"]')).toBe(false);15  expect(isSelectorClauseEnd('>>[foo|="bar"]')).toBe(false);16  expect(isSelectorClauseEnd('>>:text("bar")')).toBe(false);17  expect(isSelecto

Using AI Code Generation

1const { isSelectorClauseEnd } = require('playwright/lib/utils/selectors');2const { parseSelector } = require('playwright/lib/utils/selectorsParser');3const selector = parseSelector('css=div >> css=div >> css=div >> text="Hello"');4console.log(isSelectorClauseEnd(selector));5const { isSelectorClauseEnd } = require('playwright/lib/utils/selectors');6const { parseSelector } = require('playwright/lib/utils/selectorsParser');7const selector = parseSelector('css=div >> css=div >> css=div >> text="Hello"');8console.log(isSelectorClauseEnd(selector, 3));9const { isSelectorClauseEnd } = require('playwright/lib/utils/selectors');10const { parseSelector } = require('playwright/lib/utils/selectorsParser');11const selector = parseSelector('css=div >> css=div >> css=div >> text="Hello"');12console.log(isSelectorClauseEnd(selector, 4));13const { isSelectorClauseEnd } = require('playwright/lib/utils/selectors');14const { parseSelector } = require('playwright/lib/utils/selectorsParser');15const selector = parseSelector('css=div >> css=div >> css=div >> text="Hello"');16console.log(isSelectorClauseEnd(selector, 5));

Using AI Code Generation

1const { InternalSelectorEngine } = require('playwright');2const selectorEngine = new InternalSelectorEngine();3const selector = 'div[role="button"] >> text=hello';4const hasEnd = selectorEngine.isSelectorClauseEnd(selector);5const { SelectorEngine } = require('playwright');6const selectorEngine = new SelectorEngine();7const selector = 'div[role="button"] >> text=hello';8const hasEnd = selectorEngine.isSelectorClauseEnd(selector);9const { SelectorEngine } = require('playwright');10const selectorEngine = new SelectorEngine();11const selector = 'div[role="button"] >> text=hello';12const hasEnd = selectorEngine.isSelectorClauseEnd(selector);13const { SelectorEngine } = require('playwright');14const selectorEngine = new SelectorEngine();15const selector = 'div[role="button"] >> text=hello';16const hasEnd = selectorEngine.isSelectorClauseEnd(selector);17const { SelectorEngine } = require('playwright');18const selectorEngine = new SelectorEngine();19const selector = 'div[role="button"] >> text=hello';20const hasEnd = selectorEngine.isSelectorClauseEnd(selector);21const { SelectorEngine } = require('playwright');22const selectorEngine = new SelectorEngine();23const selector = 'div[role="button"] >> text=hello';24const hasEnd = selectorEngine.isSelectorClauseEnd(selector);25const { SelectorEngine } = require('playwright');26const selectorEngine = new SelectorEngine();27const selector = 'div[role="button"] >> text=hello';28const hasEnd = selectorEngine.isSelectorClauseEnd(selector);29const { SelectorEngine } = require('playwright');

Using AI Code Generation

1const { isSelectorClauseEnd } = require('playwright/lib/client/selectorEngine');2const selector = 'div > span >> text=hello >> div >> span >> text=world';3const selectorParts = selector.split('>>');4for (let i = 0; i < selectorParts.length; i++) {5    console.log(isSelectorClauseEnd(selectorParts, i));6}

Using AI Code Generation

1const { isSelectorClauseEnd } = require('playwright/lib/server/frames');2const { expect } = require('chai');3const { isSelectorClauseEnd } = require('playwright/lib/server/frames');4describe('Playwright Internal API', () => {5  it('should return true if selector clause ends with a comma', () => {6    expect(isSelectorClauseEnd('div,')).to.be.true;7  });8});9function isSelectorClauseEnd(selector) {10  return selector.endsWith(',');11}12export function isSelectorClauseEnd(selector: string): boolean;131 passing (13ms)

StackOverFlow community discussions

Questions

Discussion

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

firefox browser does not start in playwright

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

Running Playwright in Azure Function

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

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

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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