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How to use warnOnOpaqueIdentifierAccessInDEV method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactFiberHooks.new.js

...1415  if (__DEV__) {1416    return isUpdatingOpaqueValueInRenderPhase;1417  }1418}1419function warnOnOpaqueIdentifierAccessInDEV(fiber) {1420  if (__DEV__) {1421    // TODO: Should warn in effects and callbacks, too1422    const name = getComponentName(fiber.type) || 'Unknown';1423    if (getIsRendering() && !didWarnAboutUseOpaqueIdentifier[name]) {1424      console.error(1425        'The object passed back from useOpaqueIdentifier is meant to be ' +1426          'passed through to attributes only. Do not read the ' +1427          'value directly.',1428      );1429      didWarnAboutUseOpaqueIdentifier[name] = true;1430    }1431  }1432}1433function mountOpaqueIdentifier()                      {1434  const makeId = __DEV__1435    ? makeClientIdInDEV.bind(1436        null,1437        warnOnOpaqueIdentifierAccessInDEV.bind(null, currentlyRenderingFiber),1438      )1439    : makeClientId;1440  if (getIsHydrating()) {1441    let didUpgrade = false;1442    const fiber = currentlyRenderingFiber;1443    const readValue = () => {1444      if (!didUpgrade) {1445        // Only upgrade once. This works even inside the render phase because1446        // the update is added to a shared queue, which outlasts the1447        // in-progress render.1448        didUpgrade = true;1449        if (__DEV__) {1450          isUpdatingOpaqueValueInRenderPhase = true;1451          setId(makeId());1452          isUpdatingOpaqueValueInRenderPhase = false;1453          warnOnOpaqueIdentifierAccessInDEV(fiber);1454        } else {1455          setId(makeId());1456        }1457      }1458      invariant(1459        false,1460        'The object passed back from useOpaqueIdentifier is meant to be ' +1461          'passed through to attributes only. Do not read the value directly.',1462      );1463    };1464    const id = makeOpaqueHydratingObject(readValue);1465    const setId = mountState(id)[1];1466    if ((currentlyRenderingFiber.mode & BlockingMode) === NoMode) {1467      if (__DEV__ && enableDoubleInvokingEffects) {...

ReactFiberHooks.old.js

Source: ReactFiberHooks.old.js

...972    {973      return isUpdatingOpaqueValueInRenderPhase;974    }975  }976  function warnOnOpaqueIdentifierAccessInDEV(fiber) {977    {978      // TODO: Should warn in effects and callbacks, too979      var name = getComponentName(fiber.type) || 'Unknown';980      if (getIsRendering() && !didWarnAboutUseOpaqueIdentifier[name]) {981        error('The object passed back from useOpaqueIdentifier is meant to be ' + 'passed through to attributes only. Do not read the ' + 'value directly.');982        didWarnAboutUseOpaqueIdentifier[name] = true;983      }984    }985  }986  function mountOpaqueIdentifier() {987    var makeId =  makeClientIdInDEV.bind(null, warnOnOpaqueIdentifierAccessInDEV.bind(null, currentlyRenderingFiber$1)) ;988    if (getIsHydrating()) {989      var didUpgrade = false;990      var fiber = currentlyRenderingFiber$1;991      var readValue = function () {992        if (!didUpgrade) {993          // Only upgrade once. This works even inside the render phase because994          // the update is added to a shared queue, which outlasts the995          // in-progress render.996          didUpgrade = true;997          {998            isUpdatingOpaqueValueInRenderPhase = true;999            setId(makeId());1000            isUpdatingOpaqueValueInRenderPhase = false;1001            warnOnOpaqueIdentifierAccessInDEV(fiber);1002          }1003        }1004        {1005          {1006            throw Error( "The object passed back from useOpaqueIdentifier is meant to be passed through to attributes only. Do not read the value directly." );1007          }1008        }1009      };1010      var id = makeOpaqueHydratingObject(readValue);1011      var setId = mountState(id)[1];1012      if ((currentlyRenderingFiber$1.mode & BlockingMode) === NoMode) {1013        currentlyRenderingFiber$1.flags |= Update | Passive;1014        pushEffect(HasEffect | Passive$1, function () {1015          setId(makeId());...

Using AI Code Generation

1const { warnOnOpaqueIdentifierAccessInDEV } = require('playwright');2warnOnOpaqueIdentifierAccessInDEV(true);3const { chromium } = require('playwright');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})();11    at Object.<anonymous> (C:\Users\user\Documents\test.js:7:1)12    at Module._compile (internal/modules/cjs/loader.js:999:30)13    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1027:10)14    at Module.load (internal/modules/cjs/loader.js:863:32)15    at Function.Module._load (internal/modules/cjs/loader.js:708:14)16    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:60:12)

Using AI Code Generation

1const { warnOnOpaqueIdentifierAccessInDEV } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');2warnOnOpaqueIdentifierAccessInDEV();3const { playwrightRecorder } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');4playwrightRecorder();5const { PlaywrightRecorder } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');6const recorder = new PlaywrightRecorder();7const { PlaywrightRecorder } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');8const recorder = new PlaywrightRecorder();9const { PlaywrightRecorder } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');10const recorder = new PlaywrightRecorder();11const { PlaywrightRecorder } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');12const recorder = new PlaywrightRecorder();13const { PlaywrightRecorder } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');14const recorder = new PlaywrightRecorder();15const { PlaywrightRecorder } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');16const recorder = new PlaywrightRecorder();17const { PlaywrightRecorder } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');18const recorder = new PlaywrightRecorder();19const { PlaywrightRecorder } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');20const recorder = new PlaywrightRecorder();21const { PlaywrightRecorder } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');22const recorder = new PlaywrightRecorder();23const { PlaywrightRecorder } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');24const recorder = new PlaywrightRecorder();25const { Play

Using AI Code Generation

1const { warnOnOpaqueIdentifierAccessInDEV } = require('playwright/lib/server/common/utils');2warnOnOpaqueIdentifierAccessInDEV();3const { chromium } = require('playwright');4(async () => {5  const browser = await chromium.launch();6  const context = await browser.newContext();7  const page = await context.newPage();8  await browser.close();9})();

Using AI Code Generation

1const { warnOnOpaqueIdentifierAccessInDEV } = require('playwright/lib/server/injected/playwright')2warnOnOpaqueIdentifierAccessInDEV(true);3warnOnOpaqueIdentifierAccessInDEV(false);4warnOnOpaqueIdentifierAccessInDEV();5warnOnOpaqueIdentifierAccessInDEV(1);6warnOnOpaqueIdentifierAccessInDEV('abc');7warnOnOpaqueIdentifierAccessInDEV({});8warnOnOpaqueIdentifierAccessInDEV([]);9warnOnOpaqueIdentifierAccessInDEV(null);10warnOnOpaqueIdentifierAccessInDEV(undefined);11warnOnOpaqueIdentifierAccessInDEV(Symbol());12warnOnOpaqueIdentifierAccessInDEV(() => {});13warnOnOpaqueIdentifierAccessInDEV(async () => {});14warnOnOpaqueIdentifierAccessInDEV(function () {});15warnOnOpaqueIdentifierAccessInDEV(class {});16warnOnOpaqueIdentifierAccessInDEV(new Map());17warnOnOpaqueIdentifierAccessInDEV(new Set());18warnOnOpaqueIdentifierAccessInDEV(new WeakMap());

Using AI Code Generation

1const { warnOnOpaqueIdentifierAccessInDEV } = require('playwright-core/lib/server/supplements/recorder/recorderSupplement.js');2warnOnOpaqueIdentifierAccessInDEV();3const { chromium } = require('playwright-core');4(async () => {5  const browser = await chromium.launch();6  const page = await browser.newPage();7  await page.click('text=Get started');8  await page.click('text=Docs');9  await page.click('text=API');10  await page.click('tex

Using AI Code Generation

1const { warnOnOpaqueIdentifierAccessInDEV } = require('playwright/lib/client/owndedSymbol');2warnOnOpaqueIdentifierAccessInDEV(true);3const { warnOnOpaqueIdentifierAccessInDEV } = require('playwright');4warnOnOpaqueIdentifierAccessInDEV(true);5const { warnOnOpaqueIdentifierAccessInDEV } = require('playwright');6warnOnOpaqueIdentifierAccessInDEV(false);7const { warnOnOpaqueIdentifierAccessInDEV } = require('playwright/lib/client/owndedSymbol');8warnOnOpaqueIdentifierAccessInDEV(false);9const { warnOnOpaqueIdentifierAccessInDEV } = require('playwright/lib/client/owndedSymbol');10warnOnOpaqueIdentifierAccessInDEV(false);11const { warnOnOpaqueIdentifierAccessInDEV } = require('playwright');12warnOnOpaqueIdentifierAccessInDEV(false);13const { warnOnOpaqueIdentifierAccessInDEV } = require('playwright');14warnOnOpaqueIdentifierAccessInDEV(true);15const { warnOnOpaqueIdentifierAccessInDEV } = require('playwright');16warnOnOpaqueIdentifierAccessInDEV(true);17const { warnOnOpaqueIdentifierAccessInDEV } = require('playwright');18warnOnOpaqueIdentifierAccessInDEV(false);19const { warnOnOpaqueIdentifierAccessInDEV } = require('playwright');20warnOnOpaqueIdentifierAccessInDEV(false);21const { warnOnOpaqueIdentifierAccessInDEV } = require('playwright');22warnOnOpaqueIdentifierAccessInDEV(true);23const { warnOnOpaqueIdentifierAccessInDEV } = require('playwright');24warnOnOpaqueIdentifierAccessInDEV(false

Using AI Code Generation

1const { warnOnOpaqueIdentifierAccessInDEV } = require('playwright/lib/server/inspectorInstrumentation');2const { test } = require('@playwright/test');3test('example', async ({ page }) => {4    warnOnOpaqueIdentifierAccessInDEV(page);5    const title = await page.title();6    console.log(title);7});

Using AI Code Generation

1const { Playwright } = require('playwright');2const playwright = new Playwright({3    drivers: {},4    logger: { isEnabled: () => true, log: () => { } },5});6playwright._browserServer._warnOnOpaqueIdentifierAccessInDEV = true;7const { Playwright } = require('playwright');8const playwright = new Playwright({9    drivers: {},10    logger: { isEnabled: () => true, log: () => { } },11});12playwright._browserServer._warnOnOpaqueIdentifierAccessInDEV = true;13const { Playwright } = require('playwright');14const playwright = new Playwright({15    drivers: {},16    logger: { isEnabled: () => true, log: () => { } },17});18playwright._browserServer._warnOnOpaqueIdentifierAccessInDEV = true;19const { Playwright } = require('playwright');20const playwright = new Playwright({21    drivers: {},22    logger: { isEnabled: () => true, log: () => { } },23});24playwright._browserServer._warnOnOpaqueIdentifierAccessInDEV = true;25const { Playwright } = require('playwright');26const playwright = new Playwright({27    drivers: {},28    logger: { isEnabled: () => true, log: () => { } },

Using AI Code Generation

1const { warnOnOpaqueIdentifierAccessInDEV } = require('playwright/lib/server/common/playwright.js');2const { test } = warnOnOpaqueIdentifierAccessInDEV;3test('warnOnOpaqueIdentifierAccessInDEV', async ({page}) => {4    await page.setContent(`<h1>Hi</h1>`);5    const h1 = await page.$('h1');6    const warning = await h1.evaluate((h1) => {7        return warnOnOpaqueIdentifierAccessInDEV(h1);8    });9    expect(warning).toBe(`Accessing the element with selector "h1" is not recommended. ` +10    `Instead, create a test attribute (e.g. "data-testid" or "data-test-id") ` +11    `and use the "[data-testid="foo"]" selector to access the element.`);12});

StackOverFlow community discussions

Questions

Discussion

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

Running Playwright in Azure Function

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

firefox browser does not start in playwright

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

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

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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