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How to use markCommitTimeOfFallback method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactFiberCommitWork.old.js

...1565}1566function commitSuspenseComponent(finishedWork       ) {1567  const newState                       = finishedWork.memoizedState;1568  if (newState !== null) {1569    markCommitTimeOfFallback();1570    if (supportsMutation) {1571      // Hide the Offscreen component that contains the primary children. TODO:1572      // Ideally, this effect would have been scheduled on the Offscreen fiber1573      // itself. That's how unhiding works: the Offscreen component schedules an1574      // effect on itself. However, in this case, the component didn't complete,1575      // so the fiber was never added to the effect list in the normal path. We1576      // could have appended it to the effect list in the Suspense component's1577      // second pass, but doing it this way is less complicated. This would be1578      // simpler if we got rid of the effect list and traversed the tree, like1579      // we're planning to do.1580      const primaryChildParent        = (finishedWork.child     );1581      hideOrUnhideAllChildren(primaryChildParent, true);1582    }1583  }...

ReactFiberCommitWork.js

Source: ReactFiberCommitWork.js

...1230    newDidTimeout = false;1231  } else {1232    newDidTimeout = true;1233    primaryChildParent = finishedWork.child;1234    markCommitTimeOfFallback();1235  }1236  if (supportsMutation && primaryChildParent !== null) {1237    hideOrUnhideAllChildren(primaryChildParent, newDidTimeout);1238  }1239  // If this boundary just timed out, then it will have a set of thenables.1240  // For each thenable, attach a listener so that when it resolves, React1241  // attempts to re-render the boundary in the primary (pre-timeout) state.1242  const thenables: Set<Thenable> | null = (finishedWork.updateQueue: any);1243  if (thenables !== null) {1244    finishedWork.updateQueue = null;1245    let retryCache = finishedWork.stateNode;1246    if (retryCache === null) {1247      retryCache = finishedWork.stateNode = new PossiblyWeakSet();1248    }...

Using AI Code Generation

1(async () => {2  const { chromium } = require('playwright');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 page.evaluate(() => {8    window.playwright._internal.markCommitTimeOfFallback();9  });10  await browser.close();11})();

Using AI Code Generation

1const { chromium } = require('playwright');2const playwright = require('playwright');3(async () => {4  const browser = await chromium.launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  const internalAPI = await page.evaluateHandle(() => window);8  await internalAPI.evaluate(({ markCommitTimeOfFallback }) => markCommitTimeOfFallback('test'), playwright);9  await browser.close();10})();11const { chromium, firefox, webkit } = require('playwright');12const { chromium } = require('playwright');13console.log(chromium.executablePath());14### method: Playwright.launch([options])

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._client.send('Performance.markCommitTimeOfFallback');7  await browser.close();8})();9#### playwright.executablePath()10accessed and reused for subsequent accesses. The [Browser.close]() method will automatically close11accessed and reused for subsequent accesses. The [Browser.close]() method will automatically close12accessed and reused for subsequent accesses. The [Browser.close]() method will automatically close13#### playwright.launch([options])

Using AI Code Generation

1const playwright = require('playwright');2const { chromium } = playwright;3(async () => {4  const browser = await chromium.launch({ headless: false });5  const context = await browser.newContext();6  const page = await context.newPage();7  await page.fill('input[name="q"]', 'Hello World!');8  await page.keyboard.press('Enter');9  await page.waitForNavigation();10  await page.screenshot({ path: `example.png` });11  await browser.close();12})();

Using AI Code Generation

1const playwright = require('playwright');2const fs = require('fs');3(async () => {4    for (const browserType of BROWSER) {5        const browser = await playwright[browserType].launch();6        const context = await browser.newContext();7        const page = await context.newPage();8        try {9            await page.screenshot({ path: `example-${browserType}.png` });10            await page.close();11        } catch (error) {12            console.log(error);13            await page.close();14        }15        await context.close();16        await browser.close();17    }18})();

Using AI Code Generation

1const { chromium } = require('playwright');2const { markCommitTimeOfFallback } = require('playwright/lib/server/supplements/recorder/recorderSupplement');3(async () => {4  const browser = await chromium.launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  await page.click('#tsf > div:nth-child(2) > div > div.RNNXgb > div > div.a4bIc > input');8  await markCommitTimeOfFallback(page, 0);9  await page.click('text="playwright"');10  await page.click('#rso > div:nth-child(1) > div > div > div > div > div.r > a > h3');11  await page.click('text="Pla

Using AI Code Generation

1const playwright = require('playwright');2const { chromium } = playwright;3(async () => {4    const browser = await chromium.launch({ headless: false, slowMo: 50 });5    const page = await browser.newPage();6    await page.screenshot({ path: `example.png` });7    await browser.close();8})();9import { PlaywrightTestConfig } from '@playwright/test';10const config: PlaywrightTestConfig = {11    use: {12        viewport: { width: 1280, height: 720 },13    },14        {15            use: {16            },17        },18};19export default config;20{21  "scripts": {22  },23  "devDependencies": {24  }25}

Using AI Code Generation

1const { markCommitTimeOfFallback } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');2markCommitTimeOfFallback();3const { waitForFallback } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');4await waitForFallback();5const { waitForFallback } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');6await waitForFallback();7const { waitForFallback } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');8await waitForFallback();9const { waitForFallback } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');10await waitForFallback();

StackOverFlow community discussions

Questions

Discussion

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?

Running Playwright in Azure Function

firefox browser does not start in playwright

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

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

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

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

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