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How to use CommandLineHandler method in Playwright Internal

Best JavaScript code snippet using playwright-internal

CommandLineHandler.js

...20 * @property noFBModules if no Firebug modules should be loaded at startup21 * @type CommandLineHandler22 * @returns a new {@link CommandLineHandler}23 */24function CommandLineHandler() {25    this.wrappedJSObject = this;26}27CommandLineHandler.prototype =28{29      classDescription: "command line handler",30      contractID: "@almaden.ibm.com/crossfire/command-line-handler;1",31      classID: Components.ID("3AB17C22-D1A6-4FF0-9A66-3DBD42114D61"),32      QueryInterface: XPCOMUtils.generateQI([Components.interfaces.nsICommandLineHandler]),33      _xpcom_categories: [{ category: "command-line-handler", entry: "m-crossfire-clh" }],34    /**35     * @name handle36     * @description default call-back to look for the crossfire command line arguments.37     * @function38     * @public...

fireclipse_command_line.js

Source: fireclipse_command_line.js

...4const PrefService = Cc["@mozilla.org/preferences-service;1"];5const nsIPrefBranch2 = Ci.nsIPrefBranch2;6const nsIPrefService = Ci.nsIPrefService;7Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");8function CommandLineHandler() {9}10var hiddenWindow = null;11CommandLineHandler.prototype = {12		13	handle: function(cmdLine)14	{15    	try16        {17           var appShellService = Components.classes["@mozilla.org/appshell/appShellService;1"].18                getService(Components.interfaces.nsIAppShellService);19            /*20            hiddenWindow = appShellService.hiddenDOMWindow;21            hiddenWindow.dump("webtools.debug Extension CommandLine\n");22            hiddenWindow.dump("Chromebug Command Line Handler taking arguments from state:"+cmdLine.state+"\n");...

juggler.js

Source: juggler.js

...6const Ci = Components.interfaces;7const Cu = Components.utils;8const FRAME_SCRIPT = "chrome://juggler/content/content/main.js";9// Command Line Handler10function CommandLineHandler() {11  this._port = 0;12};13CommandLineHandler.prototype = {14  classDescription: "Sample command-line handler",15  classID: Components.ID('{f7a74a33-e2ab-422d-b022-4fb213dd2639}'),16  contractID: "@mozilla.org/remote/juggler;1",17  _xpcom_categories: [{18    category: "command-line-handler",19    entry: "m-juggler"20  }],21  /* nsICommandLineHandler */22  handle: async function(cmdLine) {23    const jugglerFlag = cmdLine.handleFlagWithParam("juggler", false);24    if (!jugglerFlag || isNaN(jugglerFlag))...

commandLine.js

Source: commandLine.js

1/*2 * This Source Code is subject to the terms of the Mozilla Public License3 * version 2.0 (the "License"). You can obtain a copy of the License at4 * http://mozilla.org/MPL/2.0/.5 */67"use strict";89/**10 * @module commandLine11 */1213const {XPCOMUtils} = Cu.import("resource://gre/modules/XPCOMUtils.jsm", {});1415let CommandLineHandler =16{17  // Starting the entry with "k" makes it have slightly higher priority than default command line handlers.18  classDescription: "k-abpcrawler",19  contractID: "@adblockplus.org/abpcrawler/cmdline;1",20  classID: Components.ID("{973636c2-e842-11e4-b02c-1681e6b88ec1}"),21  xpcom_categories: ["command-line-handler"],2223  init: function()24  {25    let registrar = Components.manager.QueryInterface(Ci.nsIComponentRegistrar);26    registrar.registerFactory(this.classID, this.classDescription, this.contractID, this);2728    let catMan = Cc["@mozilla.org/categorymanager;1"].getService(Ci.nsICategoryManager);29    for each (let category in this.xpcom_categories)30      catMan.addCategoryEntry(category, this.classDescription, this.contractID, false, true);3132    onShutdown.add((function()33    {34      for each (let category in this.xpcom_categories)35        catMan.deleteCategoryEntry(category, this.classDescription, false);3637      registrar.unregisterFactory(this.classID, this);38    }).bind(this));39  },4041  createInstance: function(outer, iid)42  {43    if (outer)44      throw Cr.NS_ERROR_NO_AGGREGATION;45    return this.QueryInterface(iid);46  },4748  helpInfo: "  -crawler-port      Port that ABP Crawler should communicate to\n",4950  handle: function(cmdline)51  {52    let port = cmdline.handleFlagWithParam("crawler-port", false);53    if (port != null)54      require("main").startup(parseInt(port));55  },5657  QueryInterface: XPCOMUtils.generateQI([Ci.nsICommandLineHandler, Ci.nsIFactory])58};59
...

pep-cmdline.js

Source: pep-cmdline.js

...6const PEP_CATEGORY    = "m-pep";7const PEP_DESCRIPTION = "Responsiveness Testing Harness";8Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");9// Command Line Handler10function CommandLineHandler() {11    this.wrappedJSObject = this;12    this.firstRun = true;13};14CommandLineHandler.prototype = {15  classID: PEP_CID,16  classDescription: PEP_DESCRIPTION,17  contractID: PEP_CONTRACTID,18  QueryInterface: XPCOMUtils.generateQI([19      Components.interfaces.nsISupports,20      Components.interfaces.nsICommandLineHandler21  ]),22  _xpcom_categories: [{23      category: "command-line-handler",24      entry: PEP_CATEGORY,...

nsCommandLineHandler.js

Source: nsCommandLineHandler.js

...4const Cc = Components.classes;5const Ci = Components.interfaces;6const Cr = Components.results;7Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");8function CommandLineHandler() {9}10CommandLineHandler.prototype = {11  handle: function(aCmdLine)12  {13    try {14      // Initialise the key service. Will prompt for password if there is one.15      var ks = Cc["@toolkit.mozilla.org/keyservice;1"].16               getService(Ci.nsIKeyService);17    }18    catch (e) {19      // Chances are the user cancelled the password dialog, either way it's bad20      throw Components.results.NS_ERROR_ABORT;21    }22  },...

commandline-handler.js

Source: commandline-handler.js

1Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");2function CommandLineHandler()3{4    this.wrappedJSObject = this;5}6CommandLineHandler.prototype = {7    classDescription: "Liberator Command-line Handler",8    classID: Components.ID("{16dc34f7-6d22-4aa4-a67f-2921fb5dcb69}"),9    contractID: "@mozilla.org/commandlinehandler/general-startup;1?type=liberator",10    _xpcom_categories: [{11        category: "command-line-handler",12        entry: "m-liberator"13    }],14    QueryInterface: XPCOMUtils.generateQI([Components.interfaces.nsICommandLineHandler]),15    handle: function (commandLine)16    {...

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

Using AI Code Generation

1const {chromium} = require('playwright');2(async () => {3  const browser = await chromium.launch({args: ['--no-sandbox']});4  const context = await browser.newContext();5  const page = await context.newPage();6  await page.screenshot({ path: `example.png` });7  await browser.close();8})();9const {chromium} = require('playwright');10(async () => {11  const browser = await chromium.launch({args: ['--no-sandbox']});12  const context = await browser.newContext();13  const page = await context.newPage();14  await page.screenshot({ path: `example.png` });15  await browser.close();16})();17const {chromium} = require('playwright');18(async () => {19  const browser = await chromium.launch({args: ['--no-sandbox']});20  const context = await browser.newContext();21  const page = await context.newPage();22  await page.screenshot({ path: `example.png` });23  await browser.close();24})();25const {chromium} = require('playwright');26(async () => {27  const browser = await chromium.launch({args: ['--no-sandbox']});28  const context = await browser.newContext();29  const page = await context.newPage();30  await page.screenshot({ path: `example.png` });31  await browser.close();32})();33const {chromium} = require('playwright');34(async () => {35  const browser = await chromium.launch({args: ['--no-sandbox']});36  const context = await browser.newContext();37  const page = await context.newPage();38  await page.screenshot({ path: `example.png` });39  await browser.close();40})();

Using AI Code Generation

1const {chromium} = require('playwright');2const path = require('path');3const fs = require('fs');4(async () => {5  const browser = await chromium.launch();6  const context = await browser.newContext();7  const page = await context.newPage();8  await page.screenshot({ path: 'example.png' });9  await browser.close();10})();11const {chromium} = require('playwright');12const path = require('path');13const fs = require('fs');14(async () => {15  const browser = await chromium.launch();16  const context = await browser.newContext();17  const page = await context.newPage();18  await page.screenshot({ path: 'example.png' });19  await browser.close();20})();21const {chromium} = require('playwright');22const path = require('path');23const fs = require('fs');24(async () => {25  const browser = await chromium.launch();26  const context = await browser.newContext();27  const page = await context.newPage();28  await page.screenshot({ path: 'example.png' });29  await browser.close();30})();31const {chromium} = require('playwright');32const path = require('path');33const fs = require('fs');34(async () => {35  const browser = await chromium.launch();36  const context = await browser.newContext();37  const page = await context.newPage();38  await page.screenshot({ path: 'example.png' });39  await browser.close();40})();41const {chromium} = require('playwright');42const path = require('path');43const fs = require('fs');44(async () => {45  const browser = await chromium.launch();46  const context = await browser.newContext();47  const page = await context.newPage();48  await page.screenshot({ path: 'example.png' });

Using AI Code Generation

1const {chromium} = require('playwright');2const {CommandLineHandler} = require('playwright/lib/server/browserType');3const handler = new CommandLineHandler();4(async () => {5  const browser = await chromium.launch({6    args: handler.getArgumentsForBrowserType('chromium'),7  });8  const page = await browser.newPage();9  await page.screenshot({ path: 'example.png' });10  await browser.close();11})();12    at onClose (/Users/akashsharma/Downloads/playwright-test/node_modules/playwright/lib/server/browserType.js:222:21)13    at ChildProcess.<anonymous> (/Users/akashsharma/Downloads/playwright-test/node_modules/playwright/lib/server/browserType.js:222:21)14    at ChildProcess.emit (events.js:315:20)15    at Process.ChildProcess._handle.onexit (internal/child_process.js:275:12)

Using AI Code Generation

1const {chromium, firefox, webkit, devices} = require('playwright');2const {CommandLineHandler} = require('playwright/lib/cli/cli');3const {run} = require('playwright/lib/cli/cli');4const {helper} = require('playwright/lib/utils/helper');5const {getTestState} = require('playwright/lib/test/testState');6const {TestType} = require('playwright/lib/test/testType');7const {Test} = require('playwright/lib/test/test');8const {TestRunner} = require('playwright/lib/test/testRunner');9const {TestModifier} = require('playwright/lib/test/testModifier');10const {TestResult} = require('playwright/lib/test/testResult');11const {TestStatus} = require('playwright/lib/test/testStatus');12const {TestFixtures} = require('playwright/lib/test/testFixtures');13const {TestStep} = require('playwright/lib/test/testStep');14const {TestSuite} = require('playwright/lib/test/testSuite');15const {TestWorker} = require('playwright/lib/test/testWorker');16const {Test} = require('playwright/lib/test/test');17async function main() {18  const test = new Test('test', async () => {19  }, new TestModifier(), new TestFixtures());20  const runner = new TestRunner(new TestType('test'), new TestModifier(), new TestFixtures(), new TestStep());21  const worker = new TestWorker(runner, new TestResult());22  const suite = new TestSuite('suite', new TestModifier(), new TestFixtures(), new TestStep());23  const state = getTestState();24  const cli = new CommandLineHandler();25  const helper = new helper();26  const devices = new devices();27  const chromium = new chromium();28  const firefox = new firefox();

Using AI Code Generation

1const {chromium} = require('playwright');2(async () => {3  const browser = await chromium.launch({4  });5  const context = await browser.newContext();6  const page = await context.newPage();7  await page.screenshot({ path: `example.png` });8  await browser.close();9})();

Using AI Code Generation

1const { CommandLineHandler } = require('playwright-core/lib/server/cli/commandLine');2const handler = new CommandLineHandler();3const options = handler.parse(process.argv);4console.log(options);5const { Playwright } = require('playwright-core');6const playwright = Playwright.create();7const browser = await playwright.chromium.launch(options);8    at BrowserContext._wrapApiCall (/home/username/Downloads/playwright-test/node_modules/playwright-core/lib/server/browserContext.js:88:15)9    at BrowserContext._wrapApiCall (/home/username/Downloads/playwright-test/node_modules/playwright-core/lib/server/chromium/crBrowser.js:66:24)

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

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

firefox browser does not start in playwright

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

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

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

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Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
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Handling Alerts and Dropdowns in Playwright : Playwright interact with different types of alerts and pop-ups, such as simple, confirmation, and prompt, and different types of dropdowns, such as single selector and multi-selector get your hands-on with handling alerts and dropdown in Playright testing.
Playwright vs Puppeteer: Get to know about the difference between two testing frameworks and how they are different than one another, which browsers they support, and what features they provide.
Run Playwright Tests on LambdaTest: Playwright testing with LambdaTest leverages test performance to the utmost. You can run multiple Playwright tests in Parallel with the LammbdaTest test cloud. Get a step-by-step guide to run your Playwright test on the LambdaTest platform.
Playwright Python Tutorial: Playwright automation framework support all major languages such as Python, JavaScript, TypeScript, .NET and etc. However, there are various advantages to Python end-to-end testing with Playwright because of its versatile utility. Get the hang of Playwright python testing with this chapter.
Playwright End To End Testing Tutorial: Get your hands on with Playwright end-to-end testing and learn to use some exciting features such as TraceViewer, Debugging, Networking, Component testing, Visual testing, and many more.
Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.