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How to use exitDisallowedContextReadInDEV method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactUpdateQueue.js

...239          }240        }241        const nextState = payload.call(instance, prevState, nextProps);242        if (true) {243          exitDisallowedContextReadInDEV();244        }245        return nextState;246      }247      // State object248      return payload;249    }250    case CaptureUpdate: {251      workInProgress.effectTag =252        (workInProgress.effectTag & ~ShouldCapture) | DidCapture;253    }254    // Intentional fallthrough255    case UpdateState: {256      const payload = update.payload;257      let partialState;258      if (typeof payload === 'function') {259        // Updater function260        if (true) {261          enterDisallowedContextReadInDEV();262          if (263            debugRenderPhaseSideEffectsForStrictMode &&264            workInProgress.mode & StrictMode265          ) {266            payload.call(instance, prevState, nextProps);267          }268        }269        partialState = payload.call(instance, prevState, nextProps);270        if (true) {271          exitDisallowedContextReadInDEV();272        }273      } else {274        // Partial state object275        partialState = payload;276      }277      if (partialState === null || partialState === undefined) {278        // Null and undefined are treated as no-ops.279        return prevState;280      }281      // Merge the partial state and the previous state.282      return Object.assign({}, prevState, partialState);283    }284    case ForceUpdate: {285      hasForceUpdate = true;...

Using AI Code Generation

1const playwright = require('playwright');2(async () => {3  const browser = await playwright.chromium.launch({ headless: false });4  const context = await browser.newContext();5  const page = await context.newPage();6})();7at new Promise ()8at CDPSession.send (/Users/username/Downloads/playwright-test/node_modules/playwright/lib/client/connection.js:313:16)9at new Promise ()10at CDPSession.send (/Users/username/Downloads/playwright-test/node_modules/playwright/lib/client/connection.js:313:16)11at ExecutionContext._evaluateInternal (/Users/username/Downloads/playwright-test/node_modules/playwright/lib/client/executionContext.js:129:17)12at ExecutionContext.evaluate (/Users/username/Downloads/playwright-test/node_modules/playwright/lib/client/executionContext.js:42:21)13at Page.evaluate (/Users/username/Downloads/playwright-test/node_modules/playwright/lib/client/page.js:1738:29)14at new Promise ()15const playwright = require('playwright');16(async () => {

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.screenshot({ path: 'google.png' });7  await browser.close();8})();

Using AI Code Generation

1(async () => {2  const { chromium } = require('playwright');3  const browser = await chromium.launch();4  const page = await browser.newPage();5  await page.evaluate(() => {6    const { exitDisallowedContextReadInDEV } = require('playwright/lib/internal/api.js');7    exitDisallowedContextReadInDEV();8  });9  await browser.close();10})();11(async () => {12  const { chromium } = require('playwright');13  const browser = await chromium.launch();14  const page = await browser.newPage();15  await page.evaluate(() => {16    const { exitDisallowedContextReadInDEV } = require('playwright/lib/internal/api.js');17    exitDisallowedContextReadInDEV();18  });19  await browser.close();20})();21(async () => {22  const { chromium } = require('playwright');23  const browser = await chromium.launch();24  const page = await browser.newPage();25  await page.evaluate(() => {26    const { exitDisallowedContextReadInDEV } = require('playwright/lib/internal/api.js');27    exitDisallowedContextReadInDEV();28  });29  await browser.close();30})();31(async () => {32  const { chromium } = require('playwright');33  const browser = await chromium.launch();34  const page = await browser.newPage();35  await page.evaluate(() => {36    const { exitDisallowedContextReadInDEV } = require('playwright/lib/internal/api.js');37    exitDisallowedContextReadInDEV();38  });39  await browser.close();40})();41(async () => {42  const { chromium } = require('play

Using AI Code Generation

1const { exitDisallowedContextReadInDEV } = require('playwright/lib/utils/registry');2exitDisallowedContextReadInDEV();3const { exitDisallowedContextReadInDEV } = require('playwright/lib/utils/registry');4exitDisallowedContextReadInDEV();5const { exitDisallowedContextReadInDEV } = require('playwright/lib/utils/registry');6exitDisallowedContextReadInDEV();7const { exitDisallowedContextReadInDEV } = require('playwright/lib/utils/registry');8exitDisallowedContextReadInDEV();9const { exitDisallowedContextReadInDEV } = require('playwright/lib/utils/registry');10exitDisallowedContextReadInDEV();11const { exitDisallowedContextReadInDEV } = require('playwright/lib/utils/registry');12exitDisallowedContextReadInDEV();13const { exitDisallowedContextReadInDEV } = require('playwright/lib/utils/registry');14exitDisallowedContextReadInDEV();15const { exitDisallowedContextReadInDEV } = require('playwright/lib/utils/registry');16exitDisallowedContextReadInDEV();17const { exitDisallowedContextReadInDEV } = require('playwright/lib/utils/registry');18exitDisallowedContextReadInDEV();19const { exitDisallowedContextReadInDEV } = require('playwright/lib/utils/registry');20exitDisallowedContextReadInDEV();21const { exitDisallowedContextReadInDEV } = require('playwright/lib/utils/registry');22exitDisallowedContextReadInDEV();

Using AI Code Generation

1const { exitDisallowedContextReadInDEV } = require('playwright/lib/server/browserContext');2const { chromium } = require('playwright');3(async () => {4    const browser = await chromium.launch({ headless: false });5    const context = await browser.newContext();6    exitDisallowedContextReadInDEV(context);7    const page = await context.newPage();8    await page.screenshot({ path: 'example.png' });9    await browser.close();10})();11    at exitDisallowedContextReadInDEV (D:\playwright\playwright\lib\server\browserContext.js:106:11)12    at processTicksAndRejections (internal/process/task_queues.js:93:5)13    at async Object.<anonymous> (D:\playwright\test.js:6:5)

Using AI Code Generation

1const { exitDisallowedContextReadInDEV } = require('playwright/lib/server/cjs/browserContext');2exitDisallowedContextReadInDEV();3const { chromium } = require('playwright');4(async () => {5  const browser = await chromium.launch();6  const context = await browser.newContext();7  console.log(await context.evaluate(() => {8    return document.cookie;9  }));10  await browser.close();11})();12    at exitDisallowedContextReadInDEV (/Users/username/Downloads/playwright-test/node_modules/playwright/lib/server/cjs/browserContext.js:33:15)13    at async Object.evaluate (/Users/username/Downloads/playwright-test/node_modules/playwright/lib/server/cjs/browserContext.js:270:5)14(async () => {15  const browser = await chromium.launch();16  const context = await browser.newContext();17  const page = await context.newPage();18  console.log(await page.context().cookies());19  await browser.close();20})();

Using AI Code Generation

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

Using AI Code Generation

1const playwright = require('playwright');2const { exitDisallowedContextReadInDEV } = playwright._impl._electron;3exitDisallowedContextReadInDEV();4const { test, expect } = require('@playwright/test');5test('my test', async ({ page }) => {6  expect(await page.innerText('text=Playwright')).toBe('Playwright');7});

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?

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

firefox browser does not start 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

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

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

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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