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How to use _runJob method in Playwright Internal

Best JavaScript code snippet using playwright-internal

attachment_downloads.js

...130    const existing = _activeAttachmentDownloadJobs[job.id];131    if (existing) {132      logger.warn(`_maybeStartJob: Job ${job.id} is already running`);133    } else {134      _activeAttachmentDownloadJobs[job.id] = _runJob(job);135    }136  }137}138async function _runJob(job) {139  const { id, messageId, attachment, type, index, attempts } = job || {};140  let message;141  try {142    if (!job || !attachment || !messageId) {143      throw new Error(144        `_runJob: Key information required for job was missing. Job id: ${id}`145      );146    }147    logger.info(`attachment_downloads/_runJob for job id ${id}`);148    const found =149      MessageController.getById(messageId) ||150      (await getMessageById(messageId, {151        Message: Whisper.Message,152      }));...

jobs.js

Source: jobs.js

1import { CampaignsJobs } from "/imports/api/campaigns/server/campaignsJobs.js";2import { EntriesJobs } from "/imports/api/facebook/entries/server/entriesJobs.js";3import { PeopleJobs } from "/imports/api/facebook/people/server/peopleJobs.js";4import { EmailsJobs } from "/imports/emails/server/jobs.js";5import { Jobs } from "../jobs.js";6import { JobsHelpers } from "./jobsHelpers.js";7// init jobs pool for workers8JobsPool.jobs = _.extend(CampaignsJobs, EntriesJobs, PeopleJobs, EmailsJobs);9let _runJob;10Meteor.startup(function() {11  if (12    !Meteor.settings.public.server ||13    Meteor.settings.public.server == "jobs"14  ) {15    Jobs.startJobServer();16    return JobsHelpers.cleanIdleJobs();17  }18});19if (Meteor.settings.public.deployMode === "local") {20  _runJob = function(job, callback) {21    const startTime = new Date().getTime();22    const { data } = job;23    const jobType = job.type;24    logger.debug("JobsHelpers.runJob: called", {25      jobType,26      jobId: job.doc._id,27      jobData: data28    });29    JobsPool.jobs[jobType].run({ job });30    return callback();31  };32} else {33  _runJob = function(job, callback) {34    const startTime = new Date().getTime();35    const { data } = job;36    const jobType = job.type;37    try {38      logger.debug("JobsHelpers.runJob: called", {39        jobType,40        jobId: job.doc._id,41        jobData: data42      });43      return JobsPool.jobs[jobType].run({ job });44    } catch (error) {45      logger.warn("JobsHelpers.runJob: unexpected error catched", {46        jobType,47        jobData: data,48        error49      });50      try {51        job.done();52        return job.remove();53      } catch (error1) {54        error = error1;55        return logger.warn(56          "JobsHelpers.runJob: error while removing job after unexpected error",57          { jobType, jobData: data, error }58        );59      }60    } finally {61      const finishTime = new Date().getTime();62      const totalTime = (finishTime - startTime) / (60 * 1000);63      logger.debug("JobsHelpers.runJob: finished", {64        jobType,65        jobData: data,66        totalTime: totalTime.toFixed(3)67      });68      callback();69    }70  };71}72if (!Meteor.settings.server || Meteor.settings.server == "jobs") {73  for (let jobType of Array.from(_.keys(JobsPool.jobs))) {74    const workerOptions = JobsPool.jobs[jobType].workerOptions || {};75    Jobs.processJobs(jobType, workerOptions, _runJob);76  }...

PromiseQueue.js

Source: PromiseQueue.js

...15    if (this.processing.has(job)) {16      return;17    }18    if (this.runPromise && this.numRunning < this.maxConcurrent) {19      this._runJob(job, args);20    } else {21      this.queue.push([job, args]);22    }23    this.processing.add(job);24  }25  run() {26    if (this.runPromise) {27      return this.runPromise;28    }29    const runPromise = new Promise((resolve, reject) => {30      this.resolve = resolve;31      this.reject = reject;32    });33    this.runPromise = runPromise;34    this._next();35    return runPromise;36  }37  async _runJob(job, args) {38    try {39      this.numRunning++;40      await this.process(job, ...args);41      this.processing.delete(job);42      this.processed.add(job);43      this.numRunning--;44      this._next();45    } catch (err) {46      this.numRunning--;47      if (this.retry) {48        this.queue.push([job, args]);49      } else {50        this.processing.delete(job);51      }52      if (this.reject) {53        this.reject(err);54      }55      this._reset();56    }57  }58  _next() {59    if (!this.runPromise) {60      return;61    }62    if (this.queue.length > 0) {63      while (this.queue.length > 0 && this.numRunning < this.maxConcurrent) {64        this._runJob(...this.queue.shift());65      }66    } else if (this.processing.size === 0) {67      this.resolve(this.processed);68      this._reset();69    }70  }71  _reset() {72    this.processed = new Set();73    this.runPromise = null;74    this.resolve = null;75    this.reject = null;76  }77}78module.exports = PromiseQueue;

schedule.js

Source: schedule.js

...19    if (_(schedules).has("run")) {20        _(schedules.run).forEach(function (schedule, id) {21            if (!schedule.enable) return;22            console.log("run scheduled: " + id);23            _runJob(id, schedule.schedule, "run");24        });25    }26    if (_(schedules).has("stop")) {27        _(schedules.stop).forEach(function (schedule, id) {28            if (!schedule.enable) return;29            console.log("stop scheduled: " + id);30            _runJob(id, schedule.schedule, "stop");31        });32    }33};34function _runJob (id, schedule, mode) {35    var job = new cron({36        cronTime: schedule,37        onTick: function () {38            if (mode === "run") instances._runInstance("ap-northeast-1", id);39            if (mode === "stop") instances._stopInstance("ap-northeast-1", id);40        },41        start: false,42        timeZone: "Japan/Tokyo"43    });44    job.start();...

TickService.js

Source: TickService.js

...20    }21    function registerJob (job, runNow) {22      this.jobs.push(job);23      if (runNow) {24        _runJob(job);25      }26    }27    function reset () {28      this.jobs.length = 0;29    }30    function _tick () {31      angular.forEach(self.jobs, function (job) {32        _runJob(job);33      });34    }35    function _runJob (job) {36      if (angular.isFunction(job)) {37        job.call(self);38      }39    }40  }...

Using AI Code Generation

1const { Playwright } = require('playwright');2const playwright = new Playwright();3const browser = await playwright.chromium.launch();4const context = await browser.newContext();5const page = await context.newPage();6const internal = page._delegate;7const job = await internal._runJob('evaluateHandle', { expression: 'window' });8console.log(job.result);9await browser.close();10import { Playwright } from 'playwright';11const playwright = new Playwright();12const browser = await playwright.chromium.launch();13const context = await browser.newContext();14const page = await context.newPage();15const internal = page._delegate;16const job = await internal._runJob('evaluateHandle', { expression: 'window' });17console.log(job.result);18await browser.close();

Using AI Code Generation

1const { InternalAPI } = require('playwright-core/lib/server/frames');2const { BrowserContext } = require('playwright-core/lib/server/browserContext');3const { Page } = require('playwright-core/lib/server/page');4const { Frame } = require('playwright-core/lib/server/frame');5const { Worker } = require('playwright-core/lib/server/worker');6const { ElementHandle } = require('playwright-core/lib/server/dom');7const { JSHandle } = require('playwright-core/lib/server/jsHandle');8const internalAPI = new InternalAPI({});9const browserContext = new BrowserContext({}, internalAPI);10const page = new Page(browserContext, internalAPI, null, null, null);11const frame = new Frame(page, null, internalAPI, null, null, null);12const worker = new Worker(page, null, internalAPI, null, null, null);13const elementHandle = new ElementHandle(frame, null, internalAPI, null, null);14const jsHandle = new JSHandle(elementHandle, null, null, null, null);15const runJob = (method, args) => {16    return internalAPI._runJob(method, args);17};18runJob('JSHandle.evaluate', [jsHandle, '() => window.location.href']).then(console.log);19runJob('JSHandle.evaluate', [jsHandle, '() => window.location.href', { timeout: 1000 }]).then(console.log);20runJob('JSHandle.evaluate', [jsHandle, '() => window.location.href', { timeout: 1000 }, null]).then(console.log);21runJob('JSHandle.evaluate', [jsHandle, '() => window.location.href', { timeout: 1000 }, null, null]).then(console.log);22runJob('JSHandle.evaluate', [jsHandle, '() => window.location.href', { timeout: 1000 }, null, null, null]).then(console.log);23runJob('JSHandle.evaluate', [jsHandle, '() => window.location.href', { timeout: 1000 }, null, null, null, null]).then(console.log);24runJob('JSHandle.evaluate', [jsHandle, '() => window.location.href', { timeout: 1000 }, null, null, null, null, null]).then(console.log);25runJob('JSHandle.evaluate', [jsHandle, '() => window.location.href', { timeout: 1000 },

Using AI Code Generation

1const { _runJob } = require('playwright-core/lib/server/browserType');2const { chromium } = require('playwright-core');3const browser = await chromium.launch();4const page = await browser.newPage();5const result = await _runJob(page, 'evaluate', {6});7console.log(result);8const { _runJob } = require('playwright');9const { chromium } = require('playwright');10const browser = await chromium.launch();11const page = await browser.newPage();12const result = await _runJob(page, 'evaluate', {13});14console.log(result);15const { _runJob } = require('playwright-core/lib/server/browserType');16const { chromium } = require('playwright-core');17const browser = await chromium.launch();18const page = await browser.newPage();19const result = await _runJob(page, 'evaluate', {20});21console.log(result);22const { _runJob } = require('playwright');23const { chromium } = require('playwright');24const browser = await chromium.launch();25const page = await browser.newPage();26const result = await _runJob(page, 'evaluate', {27});28console.log(result);29const { _runJob } = require('playwright-core/lib/server/browserType');30const { chromium } = require('playwright-core');31const browser = await chromium.launch();32const page = await browser.newPage();33const result = await _runJob(page, 'evaluate', {34});35console.log(result);36const { _runJob } = require('playwright');

Using AI Code Generation

1const { _runJob } = require('playwright/lib/server/browserType');2const { chromium } = require('playwright');3const browserType = chromium;4(async () => {5  const browser = await browserType.launch();6  const page = await browser.newPage();7  const result = await _runJob(browserType, 'chromium', 'chromiumVersion');8  console.log(result);9  await browser.close();10})();11{ value: 'Chromium 87.0.4280.88' }

Using AI Code Generation

1const playwright = require('playwright');2const { _runJob } = require('playwright/lib/server/browserType');3const browserType = playwright.chromium;4_runJob(browserType, 'launch', {5}).then(async browser => {6  const context = await browser.newContext();7  const page = await context.newPage();8  await page.screenshot({ path: 'example.png' });9  await browser.close();10});

Using AI Code Generation

1const { _runJob } = require('playwright/lib/server/browserType');2const browser = await chromium.launch();3const context = await browser.newContext();4const page = await context.newPage();5await page.screenshot({ path: 'example.png' });6await browser.close();7const { _runJob } = require('playwright/lib/server/browserType');8const browser = await chromium.launch();9const context = await browser.newContext();10const page = await context.newPage();11await page.screenshot({ path: 'example.png' });12await browser.close();13const { _runJob } = require('playwright/lib/server/browserType');14const browser = await chromium.launch();15const context = await browser.newContext();16const page = await context.newPage();17await page.screenshot({ path: 'example.png' });18await browser.close();19const { _runJob } = require('playwright/lib/server/browserType');20const browser = await chromium.launch();21const context = await browser.newContext();22const page = await context.newPage();23await page.screenshot({ path: 'example.png' });24await browser.close();25const { _runJob } = require('playwright/lib/server/browserType');26const browser = await chromium.launch();27const context = await browser.newContext();28const page = await context.newPage();29await page.screenshot({ path: 'example.png' });30await browser.close();31const { _runJob } = require('playwright/lib/server/browserType');32const browser = await chromium.launch();33const context = await browser.newContext();

Using AI Code Generation

1const { _runJob } = require('playwright/lib/server/browserType');2  console.log(result);3});4const { _runJob } = require('playwright/lib/server/browserType');5_runJob('chromium', 'launch', { headless: false, args: ['--remote-debugging-port=9222']}).then((result) => {6  console.log(result);7});8const { _runJob } = require('playwright/lib/server/browserType');9  console.log(result);10});11const { _runJob } = require('playwright/lib/server/browserType');12_runJob('chromium', 'launchPersistentContext', { userDataDir: '/tmp/foo', headless: false, args: ['--remote-debugging-port=9222']}).then((result) => {13  console.log(result);14});15const { _runJob } = require('playwright/lib/server/browserType');16_runJob('chromium', 'launchServer', { command: 'chromium-browser', port: 9222, timeout: 3000, env: {} }).then((result) => {17  console.log(result);18});19const { _runJob } = require('playwright/lib/server/browserType');20_runJob('chromium', 'launchPersistentServer', { command: 'chromium-browser', userDataDir: '/tmp/foo', port: 9222, timeout: 3000, env: {} }).then((result) => {21  console.log(result);22});23const { _runJob } = require('playwright/lib/server/browserType');24_runJob('chromium', 'kill

Using AI Code Generation

1const { _runJob } = require('playwright/lib/server/browserType');2const path = require('path');3async function main() {4  const job = {5    file: path.join(__dirname, 'test.html'),6    parameters: {},

Using AI Code Generation

1const { _runJob } = require('playwright/lib/server/worker');2async function run() {3    const result = await _runJob({ job: 'evaluate', args: [() => {4        return 1 + 1;5    }] });6    console.log(result);7}8run();

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?

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

Running Playwright in Azure Function

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

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

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