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How to use _onScriptParsed method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ScriptAgent.js

...71        }72    }73    // TODO: Strip off query/hash strings from URL (see CSSAgent._canonicalize())74    // WebInspector Event: Debugger.scriptParsed75    function _onScriptParsed(event, res) {76        // res = {scriptId, url, startLine, startColumn, endLine, endColumn, isContentScript, sourceMapURL}77        _idToScript[res.scriptId] = res;78        _urlToScript[res.url] = res;79    }80    // WebInspector Event: Debugger.scriptFailedToParse81    function _onScriptFailedToParse(event, res) {82        // res = {url, scriptSource, startLine, errorLine, errorMessage}83    }84    // WebInspector Event: Debugger.paused85    function _onPaused(event, res) {86        // res = {callFrames, reason, data}87        switch (res.reason) {88        // Exception89        case "exception":...

092a980e0f10c3d5a0f320539a5e2f6d9ebd2300_11_1.js

Source: 092a980e0f10c3d5a0f320539a5e2f6d9ebd2300_11_1.js

...40            _insertTrace = undefined;41        }42    }43    // WebInspector Event: Debugger.scriptParsed44    function _onScriptParsed(res) {45        // res = {scriptId, url, startLine, startColumn, endLine, endColumn, isContentScript, sourceMapURL}46        _idToScript[res.scriptId] = res;47        _urlToScript[res.url] = res;48    }49    // WebInspector Event: Debugger.scriptFailedToParse50    function _onScriptFailedToParse(res) {51        // res = {url, scriptSource, startLine, errorLine, errorMessage}52    }53    // WebInspector Event: Debugger.paused54    function _onPaused(res) {55        // res = {callFrames, reason, data}56        switch (res.reason) {57        // Exception58        case "exception":...

68030e5486ab323f874773f202f4acd09a20f287_11_1.js

Source: 68030e5486ab323f874773f202f4acd09a20f287_11_1.js

...40            _insertTrace = undefined;41        }42    }43    // WebInspector Event: Debugger.scriptParsed44    function _onScriptParsed(res) {45        // res = {scriptId, url, startLine, startColumn, endLine, endColumn, isContentScript, sourceMapURL}46        _idToScript[res.scriptId] = res;47        _urlToScript[res.url] = res;48    }49    // WebInspector Event: Debugger.scriptFailedToParse50    function _onScriptFailedToParse(res) {51        // res = {url, scriptSource, startLine, errorLine, errorMessage}52    }53    // WebInspector Event: Debugger.paused54    function _onPaused(res) {55        // res = {callFrames, reason, data}56        switch (res.reason) {57        // Exception58        case "exception":...

JSCoverage.js

Source: JSCoverage.js

1const { helper, debugError, assert } = require('../helper')2const { EVALUATION_SCRIPT_URL } = require('../executionContext')3const { convertToDisjointRanges } = require('../__shared')4class JSCoverage {5  /**6   * @param {Chrome|CRIConnection|CDPSession|Object} client7   */8  constructor (client) {9    /**10     * @type {Chrome|CRIConnection|CDPSession|Object}11     * @private12     */13    this._client = client14    /**15     * @type {boolean}16     * @private17     */18    this._enabled = false19    this._scriptURLs = new Map()20    this._scriptSources = new Map()21    this._eventListeners = []22    this._resetOnNavigation = false23  }24  /**25   * @param {!{resetOnNavigation?: boolean, reportAnonymousScripts?: boolean}} options26   */27  async start (options = {}) {28    assert(!this._enabled, 'JSCoverage is already enabled')29    const { resetOnNavigation = true, reportAnonymousScripts = false } = options30    this._resetOnNavigation = resetOnNavigation31    this._reportAnonymousScripts = reportAnonymousScripts32    this._enabled = true33    this._scriptURLs.clear()34    this._scriptSources.clear()35    this._eventListeners = [36      helper.addEventListener(37        this._client,38        'Debugger.scriptParsed',39        this._onScriptParsed.bind(this)40      ),41      helper.addEventListener(42        this._client,43        'Runtime.executionContextsCleared',44        this._onExecutionContextsCleared.bind(this)45      )46    ]47    await Promise.all([48      this._client.send('Profiler.enable'),49      this._client.send('Profiler.startPreciseCoverage', {50        callCount: false,51        detailed: true52      }),53      this._client.send('Debugger.enable'),54      this._client.send('Debugger.setSkipAllPauses', { skip: true })55    ])56  }57  _onExecutionContextsCleared () {58    if (!this._resetOnNavigation) return59    this._scriptURLs.clear()60    this._scriptSources.clear()61  }62  /**63   * @param {!Object} event64   */65  async _onScriptParsed (event) {66    // Ignore puppeteer-injected scripts67    if (event.url === EVALUATION_SCRIPT_URL) return68    // Ignore other anonymous scripts unless the reportAnonymousScripts option is true.69    if (!event.url && !this._reportAnonymousScripts) return70    try {71      const response = await this._client.send('Debugger.getScriptSource', {72        scriptId: event.scriptId73      })74      this._scriptURLs.set(event.scriptId, event.url)75      this._scriptSources.set(event.scriptId, response.scriptSource)76    } catch (e) {77      // This might happen if the page has already navigated away.78      debugError(e)79      console.error(e)80    }81  }82  /**83   * @return {Promise<Array<CoverageEntry>>}84   */85  async stop () {86    assert(this._enabled, 'JSCoverage is not enabled')87    this._enabled = false88    const [profileResponse] = await Promise.all([89      this._client.send('Profiler.takePreciseCoverage'),90      this._client.send('Profiler.stopPreciseCoverage'),91      this._client.send('Profiler.disable'),92      this._client.send('Debugger.disable')93    ])94    helper.removeEventListeners(this._eventListeners)95    const coverage = []96    for (const entry of profileResponse.result) {97      let url = this._scriptURLs.get(entry.scriptId)98      if (!url && this._reportAnonymousScripts) {99        url = 'debugger://VM' + entry.scriptId100      }101      const text = this._scriptSources.get(entry.scriptId)102      if (text === undefined || url === undefined) continue103      const flattenRanges = []104      for (const func of entry.functions) flattenRanges.push(...func.ranges)105      const ranges = convertToDisjointRanges(flattenRanges)106      coverage.push({ url, ranges, text })107    }108    return coverage109  }110}...

Using AI Code Generation

1const playwright = require('playwright');2(async () => {3  const browser = await playwright.chromium.launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  await page._client.send('Debugger.enable');7  await page._client.on('Debugger.scriptParsed', (params) => {8    console.log(params.url);9  });10  await browser.close();11})();

Using AI Code Generation

1const { Playwright } = require('playwright-core/lib/server/playwright');2const { BrowserContext } = require('playwright-core/lib/server/browserContext');3const { Page } = require('playwright-core/lib/server/page');4const playwright = Playwright.createForTest();5const browserServer = await playwright.chromium.launchServer({ headless: false });6const browser = await playwright.chromium.connect({ wsEndpoint: browserServer.wsEndpoint() });7const context = await browser.newContext();8const page = await context.newPage();9Page.prototype._onScriptParsed = function (event) {10    console.log(event.url);11};12await browserServer.close();13[MIT](LICENSE)

Using AI Code Generation

1const playwright = require('playwright');2(async () => {3  const browser = await playwright.chromium.launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  await page._client.send('Page.enable');7  page._client.on('Page.domContentEventFired', () => {8    console.log('Page.domContentEventFired');9  });10  page._client.on('Page.frameNavigated', (frame) => {11    console.log('Page.frameNavigated', frame);12  });13  page._client.on('Page.frameStartedLoading', (frame) => {14    console.log('Page.frameStartedLoading', frame);15  });16  page._client.on('Page.frameStoppedLoading', (frame) => {17    console.log('Page.frameStoppedLoading', frame);18  });19  page._client.on('Page.frameAttached', (frame) => {20    console.log('Page.frameAttached', frame);21  });22  page._client.on('Page.frameDetached', (frame) => {23    console.log('Page.frameDetached', frame);24  });25  page._client.on('Page.frameScheduledNavigation', (frame) => {26    console.log('Page.frameScheduledNavigation', frame);27  });28  page._client.on('Page.frameClearedScheduledNavigation', (frame) => {29    console.log('Page.frameClearedScheduledNavigation', frame);30  });31  page._client.on('Page.frameResized', (frame) => {32    console.log('Page.frameResized', frame);33  });34  page._client.on('Page.javascriptDialogOpening', (frame) => {35    console.log('Page.javascriptDialogOpening', frame);36  });37  page._client.on('Page.javascriptDialogClosed', (frame) => {38    console.log('Page.javascriptDialogClosed', frame);39  });40  page._client.on('Page.screencastFrame', (frame) => {41    console.log('Page.screencastFrame', frame);42  });43  page._client.on('Page.screencastVisibilityChanged', (frame) => {44    console.log('Page.screencastVisibilityChanged', frame);45  });46  page._client.on('Page.interstitialShown', (frame) => {47    console.log('Page.interstitialShown', frame);48  });49  page._client.on('Page.interstitialHidden', (frame) =>

Using AI Code Generation

1const playwright = require('playwright-core');2(async () => {3    const browser = await playwright.chromium.launch();4    const context = await browser.newContext();5    const page = await context.newPage();6    page._onScriptParsed(() => {7        console.log('script parsed');8    });9    await browser.close();10})();

Using AI Code Generation

1(async () => {2  const browser = await chromium.launch({ headless: false });3  const context = await browser.newContext();4  const page = await context.newPage();5  await page.evaluate(() => {6    window._onScriptParsed = (source) => {7      console.log(source);8    };9  });10  await page.reload();11  await browser.close();12})();13(async () => {14  const browser = await chromium.launch({ headless: false });15  const context = await browser.newContext();16  const page = await context.newPage();17  await page.evaluate(() => {18    window._onScriptParsed = (source) => {19      console.log(source);20    };21  });22  await page.reload();23  await browser.close();24})();

Using AI Code Generation

1const { chromium } = require('playwright');2const { getPlaywright } = require('playwright');3const playwright = getPlaywright('chromium');4const { Events } = playwright;5const { BrowserContext } = require('playwright/lib/server/browserContext');6const { Page } = require('playwright/lib/server/page');7const { Frame } = require('playwright/lib/server/frames');8const { Script } = require('playwright/lib/server/script');9const { NetworkManager } = require('playwright/lib/server/network');10const { CDPSession } = require('playwright/lib/server/cdp');11const { helper } = require('playwright/lib/server/helper');12const { Protocol } = require('playwright/lib/server/protocol');13const { assert } = require('playwright/lib/server/helper');14const { Connection } = require('playwright/lib/server/browserType');15const { Browser } = require('playwright/lib/server/browser');16const { BrowserServer } = require('playwright/lib/server/browserServer');17const { BrowserType } = require('playwright/lib/server/browserType');18const { TimeoutError } = require('playwright/lib/server/errors');19const { debugLogger } = require('playwright/lib/server/logger');20const { isDebugMode } = require('playwright/lib/server/helper');21const { EventEmitter } = require('events');22const { BrowserContextBase } = require('playwright/lib/server/browserContext');23const { BrowserContextDispatcher } = require('playwright/lib/server/chromium/crBrowser');24const { PageDispatcher } = require('playwright/lib/server/chromium/crPage');25const { FrameDispatcher } = require('playwright/lib/server/chromium/crFrame');26const { ConsoleMessageDispatcher } = require('playwright/lib/server/chromium/crConsoleMessage');27const { WorkerDispatcher } = require('playwright/lib/server/chromium/crWorker');28const { DialogDispatcher } = require('playwright/lib/server/chromium/crDialog');29const { DownloadDispatcher } = require('playwright/lib/server/chromium/crDownload');30const { CDPSessionDispatcher } = require('playwright/lib/server/chromium/crConnection');31const { BrowserServerDispatcher } = require('playwright/lib/server/chromium/crBrowserServer');32const { BrowserTypeDispatcher } = require('playwright/lib/server/chromium/crBrowserType');33const { BrowserDispatcher } = require('playwright/lib/server/chromium/crBrowser');

Using AI Code Generation

1const playwright = require('playwright');2const { chromium } = playwright;3const fs = require('fs');4const path = require('path');5(async () => {6  const browser = await chromium.launch();7  const context = await browser.newContext();8  const page = await context.newPage();9  const scriptId = await page.evaluate(() => {10    const scriptParsed = new Promise(resolve => {11      window.__playwright__._onScriptParsed = params => {12        resolve(params);13      };14    });15    return scriptParsed;16  });17  console.log(scriptId);18  await browser.close();19})();20const playwright = require('playwright');21const { chromium } = playwright;22const fs = require('fs');23const path = require('path');24(async () => {25  const browser = await chromium.launch();26  const context = await browser.newContext();27  const page = await context.newPage();28  const scriptId = await page.evaluate(() => {29    const scriptParsed = new Promise(resolve => {30      window.__playwright__._onScriptParsed = params => {31        resolve(params);32      };33    });34    return scriptParsed;35  });36  const source = await page.evaluate(scriptId => {37    return window.__playwright__._getScriptSource(scriptId);38  }, scriptId.scriptId);39  console.log(source);40  await browser.close();41})();42const playwright = require('playwright');43const { chromium } = playwright;44const fs = require('fs');45const path = require('path');46(async () => {47  const browser = await chromium.launch();48  const context = await browser.newContext();49  const page = await context.newPage();50  const scriptId = await page.evaluate(() => {

StackOverFlow community discussions

Questions

Discussion

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

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

firefox browser does not start in playwright

Running Playwright in Azure Function

firefox browser does not start in playwright

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

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

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

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