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How to use scheduleWorkOnParentPath method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactFiberNewContext.js

...132    }133    return changedBits | 0;134  }135}136function scheduleWorkOnParentPath(137  parent: Fiber | null,138  renderExpirationTime: ExpirationTime,139) {140  // Update the child expiration time of all the ancestors, including141  // the alternates.142  let node = parent;143  while (node !== null) {144    let alternate = node.alternate;145    if (node.childExpirationTime < renderExpirationTime) {146      node.childExpirationTime = renderExpirationTime;147      if (148        alternate !== null &&149        alternate.childExpirationTime < renderExpirationTime150      ) {151        alternate.childExpirationTime = renderExpirationTime;152      }153    } else if (154      alternate !== null &&155      alternate.childExpirationTime < renderExpirationTime156    ) {157      alternate.childExpirationTime = renderExpirationTime;158    } else {159      // Neither alternate was updated, which means the rest of the160      // ancestor path already has sufficient priority.161      break;162    }163    node = node.return;164  }165}166export function propagateContextChange(167  workInProgress: Fiber,168  context: ReactContext<mixed>,169  changedBits: number,170  renderExpirationTime: ExpirationTime,171): void {172  let fiber = workInProgress.child;173  if (fiber !== null) {174    // Set the return pointer of the child to the work-in-progress fiber.175    fiber.return = workInProgress;176  }177  while (fiber !== null) {178    let nextFiber;179    // Visit this fiber.180    const list = fiber.contextDependencies;181    if (list !== null) {182      nextFiber = fiber.child;183      let dependency = list.first;184      while (dependency !== null) {185        // Check if the context matches.186        if (187          dependency.context === context &&188          (dependency.observedBits & changedBits) !== 0189        ) {190          // Match! Schedule an update on this fiber.191          if (fiber.tag === ClassComponent) {192            // Schedule a force update on the work-in-progress.193            const update = createUpdate(renderExpirationTime);194            update.tag = ForceUpdate;195            // TODO: Because we don't have a work-in-progress, this will add the196            // update to the current fiber, too, which means it will persist even if197            // this render is thrown away. Since it's a race condition, not sure it's198            // worth fixing.199            enqueueUpdate(fiber, update);200          }201          if (fiber.expirationTime < renderExpirationTime) {202            fiber.expirationTime = renderExpirationTime;203          }204          let alternate = fiber.alternate;205          if (206            alternate !== null &&207            alternate.expirationTime < renderExpirationTime208          ) {209            alternate.expirationTime = renderExpirationTime;210          }211          scheduleWorkOnParentPath(fiber.return, renderExpirationTime);212          // Mark the expiration time on the list, too.213          if (list.expirationTime < renderExpirationTime) {214            list.expirationTime = renderExpirationTime;215          }216          // Since we already found a match, we can stop traversing the217          // dependency list.218          break;219        }220        dependency = dependency.next;221      }222    } else if (fiber.tag === ContextProvider) {223      // Don't scan deeper if this is a matching provider224      nextFiber = fiber.type === workInProgress.type ? null : fiber.child;225    } else if (226      enableSuspenseServerRenderer &&227      fiber.tag === DehydratedSuspenseComponent228    ) {229      // If a dehydrated suspense component is in this subtree, we don't know230      // if it will have any context consumers in it. The best we can do is231      // mark it as having updates on its children.232      if (fiber.expirationTime < renderExpirationTime) {233        fiber.expirationTime = renderExpirationTime;234      }235      let alternate = fiber.alternate;236      if (237        alternate !== null &&238        alternate.expirationTime < renderExpirationTime239      ) {240        alternate.expirationTime = renderExpirationTime;241      }242      // This is intentionally passing this fiber as the parent243      // because we want to schedule this fiber as having work244      // on its children. We'll use the childExpirationTime on245      // this fiber to indicate that a context has changed.246      scheduleWorkOnParentPath(fiber, renderExpirationTime);247      nextFiber = fiber.sibling;248    } else {249      // Traverse down.250      nextFiber = fiber.child;251    }252    if (nextFiber !== null) {253      // Set the return pointer of the child to the work-in-progress fiber.254      nextFiber.return = fiber;255    } else {256      // No child. Traverse to next sibling.257      nextFiber = fiber;258      while (nextFiber !== null) {259        if (nextFiber === workInProgress) {260          // We're back to the root of this subtree. Exit....

ReactFiberNewContext.new.js

Source: ReactFiberNewContext.new.js

...131    }132    return changedBits | 0;133  }134}135export function scheduleWorkOnParentPath(136  parent              ,137  renderLanes       ,138) {139  // Update the child lanes of all the ancestors, including the alternates.140  let node = parent;141  while (node !== null) {142    const alternate = node.alternate;143    if (!isSubsetOfLanes(node.childLanes, renderLanes)) {144      node.childLanes = mergeLanes(node.childLanes, renderLanes);145      if (alternate !== null) {146        alternate.childLanes = mergeLanes(alternate.childLanes, renderLanes);147      }148    } else if (149      alternate !== null &&150      !isSubsetOfLanes(alternate.childLanes, renderLanes)151    ) {152      alternate.childLanes = mergeLanes(alternate.childLanes, renderLanes);153    } else {154      // Neither alternate was updated, which means the rest of the155      // ancestor path already has sufficient priority.156      break;157    }158    node = node.return;159  }160}161export function propagateContextChange(162  workInProgress       ,163  context                     ,164  changedBits        ,165  renderLanes       ,166)       {167  let fiber = workInProgress.child;168  if (fiber !== null) {169    // Set the return pointer of the child to the work-in-progress fiber.170    fiber.return = workInProgress;171  }172  while (fiber !== null) {173    let nextFiber;174    // Visit this fiber.175    const list = fiber.dependencies;176    if (list !== null) {177      nextFiber = fiber.child;178      let dependency = list.firstContext;179      while (dependency !== null) {180        // Check if the context matches.181        if (182          dependency.context === context &&183          (dependency.observedBits & changedBits) !== 0184        ) {185          // Match! Schedule an update on this fiber.186          if (fiber.tag === ClassComponent) {187            // Schedule a force update on the work-in-progress.188            const update = createUpdate(189              NoTimestamp,190              pickArbitraryLane(renderLanes),191            );192            update.tag = ForceUpdate;193            // TODO: Because we don't have a work-in-progress, this will add the194            // update to the current fiber, too, which means it will persist even if195            // this render is thrown away. Since it's a race condition, not sure it's196            // worth fixing.197            enqueueUpdate(fiber, update);198          }199          fiber.lanes = mergeLanes(fiber.lanes, renderLanes);200          const alternate = fiber.alternate;201          if (alternate !== null) {202            alternate.lanes = mergeLanes(alternate.lanes, renderLanes);203          }204          scheduleWorkOnParentPath(fiber.return, renderLanes);205          // Mark the updated lanes on the list, too.206          list.lanes = mergeLanes(list.lanes, renderLanes);207          // Since we already found a match, we can stop traversing the208          // dependency list.209          break;210        }211        dependency = dependency.next;212      }213    } else if (fiber.tag === ContextProvider) {214      // Don't scan deeper if this is a matching provider215      nextFiber = fiber.type === workInProgress.type ? null : fiber.child;216    } else if (217      enableSuspenseServerRenderer &&218      fiber.tag === DehydratedFragment219    ) {220      // If a dehydrated suspense boundary is in this subtree, we don't know221      // if it will have any context consumers in it. The best we can do is222      // mark it as having updates.223      const parentSuspense = fiber.return;224      invariant(225        parentSuspense !== null,226        'We just came from a parent so we must have had a parent. This is a bug in React.',227      );228      parentSuspense.lanes = mergeLanes(parentSuspense.lanes, renderLanes);229      const alternate = parentSuspense.alternate;230      if (alternate !== null) {231        alternate.lanes = mergeLanes(alternate.lanes, renderLanes);232      }233      // This is intentionally passing this fiber as the parent234      // because we want to schedule this fiber as having work235      // on its children. We'll use the childLanes on236      // this fiber to indicate that a context has changed.237      scheduleWorkOnParentPath(parentSuspense, renderLanes);238      nextFiber = fiber.sibling;239    } else {240      // Traverse down.241      nextFiber = fiber.child;242    }243    if (nextFiber !== null) {244      // Set the return pointer of the child to the work-in-progress fiber.245      nextFiber.return = fiber;246    } else {247      // No child. Traverse to next sibling.248      nextFiber = fiber;249      while (nextFiber !== null) {250        if (nextFiber === workInProgress) {251          // We're back to the root of this subtree. Exit....

ReactFiberNewContext.old.js

Source: ReactFiberNewContext.old.js

...62      }63      return changedBits | 0;64    }65  }66  function scheduleWorkOnParentPath(parent, renderLanes) {67    // Update the child lanes of all the ancestors, including the alternates.68    var node = parent;69    while (node !== null) {70      var alternate = node.alternate;71      if (!isSubsetOfLanes(node.childLanes, renderLanes)) {72        node.childLanes = mergeLanes(node.childLanes, renderLanes);73        if (alternate !== null) {74          alternate.childLanes = mergeLanes(alternate.childLanes, renderLanes);75        }76      } else if (alternate !== null && !isSubsetOfLanes(alternate.childLanes, renderLanes)) {77        alternate.childLanes = mergeLanes(alternate.childLanes, renderLanes);78      } else {79        // Neither alternate was updated, which means the rest of the80        // ancestor path already has sufficient priority.81        break;82      }83      node = node.return;84    }85  }86  function propagateContextChange(workInProgress, context, changedBits, renderLanes) {87    var fiber = workInProgress.child;88    if (fiber !== null) {89      // Set the return pointer of the child to the work-in-progress fiber.90      fiber.return = workInProgress;91    }92    while (fiber !== null) {93      var nextFiber = void 0; // Visit this fiber.94      var list = fiber.dependencies;95      if (list !== null) {96        nextFiber = fiber.child;97        var dependency = list.firstContext;98        while (dependency !== null) {99          // Check if the context matches.100          if (dependency.context === context && (dependency.observedBits & changedBits) !== 0) {101            // Match! Schedule an update on this fiber.102            if (fiber.tag === ClassComponent) {103              // Schedule a force update on the work-in-progress.104              var update = createUpdate(NoTimestamp, pickArbitraryLane(renderLanes));105              update.tag = ForceUpdate; // TODO: Because we don't have a work-in-progress, this will add the106              // update to the current fiber, too, which means it will persist even if107              // this render is thrown away. Since it's a race condition, not sure it's108              // worth fixing.109              enqueueUpdate(fiber, update);110            }111            fiber.lanes = mergeLanes(fiber.lanes, renderLanes);112            var alternate = fiber.alternate;113            if (alternate !== null) {114              alternate.lanes = mergeLanes(alternate.lanes, renderLanes);115            }116            scheduleWorkOnParentPath(fiber.return, renderLanes); // Mark the updated lanes on the list, too.117            list.lanes = mergeLanes(list.lanes, renderLanes); // Since we already found a match, we can stop traversing the118            // dependency list.119            break;120          }121          dependency = dependency.next;122        }123      } else if (fiber.tag === ContextProvider) {124        // Don't scan deeper if this is a matching provider125        nextFiber = fiber.type === workInProgress.type ? null : fiber.child;126      } else if ( fiber.tag === DehydratedFragment) {127        // If a dehydrated suspense boundary is in this subtree, we don't know128        // if it will have any context consumers in it. The best we can do is129        // mark it as having updates.130        var parentSuspense = fiber.return;131        if (!(parentSuspense !== null)) {132          {133            throw Error( "We just came from a parent so we must have had a parent. This is a bug in React." );134          }135        }136        parentSuspense.lanes = mergeLanes(parentSuspense.lanes, renderLanes);137        var _alternate = parentSuspense.alternate;138        if (_alternate !== null) {139          _alternate.lanes = mergeLanes(_alternate.lanes, renderLanes);140        } // This is intentionally passing this fiber as the parent141        // because we want to schedule this fiber as having work142        // on its children. We'll use the childLanes on143        // this fiber to indicate that a context has changed.144        scheduleWorkOnParentPath(parentSuspense, renderLanes);145        nextFiber = fiber.sibling;146      } else {147        // Traverse down.148        nextFiber = fiber.child;149      }150      if (nextFiber !== null) {151        // Set the return pointer of the child to the work-in-progress fiber.152        nextFiber.return = fiber;153      } else {154        // No child. Traverse to next sibling.155        nextFiber = fiber;156        while (nextFiber !== null) {157          if (nextFiber === workInProgress) {158            // We're back to the root of this subtree. Exit....

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.waitForTimeout(10000);7  await page.close();8  await browser.close();9})();10const { chromium } = require('playwright');11(async () => {12  const browser = await chromium.launch();13  const context = await browser.newContext();14  const page = await context.newPage();15  await page.waitForTimeout(10000);16  await page.close();17  await browser.close();18  await browser._connection._transport._ws._channel.scheduleWorkOnParentPath('test.js');19})();20const { chromium } = require('playwright');21(async () => {22  const browser = await chromium.launch();23  const context = await browser.newContext();24  const page = await context.newPage();25  await page.waitForTimeout(10000);26  await page.close();27  await browser.close();

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.evaluate(async () => {7    const { scheduleWorkOnParentPath } = window["playwright"];8    await scheduleWorkOnParentPath("/path/to/parent", () => {9      console.log("This is parent page");10    });11  });12  await browser.close();13})();14const playwright = require("playwright");15(async () => {16  const browser = await playwright.chromium.launch();17  const context = await browser.newContext();18  const page = await context.newPage();19  await page.evaluate(async () => {20    const { scheduleWorkOnChildPath } = window["playwright"];21    await scheduleWorkOnChildPath("/path/to/child", () => {22      console.log("This is child page");23    });24  });25  await browser.close();26})();27const playwright = require("playwright");28(async () => {29  const browser = await playwright.chromium.launch();30  const context = await browser.newContext();31  const page = await context.newPage();32  await page.evaluate(async () => {33    const { scheduleWorkOnSiblingPath } = window["playwright"];34    await scheduleWorkOnSiblingPath("/path/to/sibling", () => {35      console.log("This is sibling page");36    });37  });38  await browser.close();39})();40const playwright = require("playwright");41(async () => {42  const browser = await playwright.chromium.launch();43  const context = await browser.newContext();44  const page = await context.newPage();45  await page.evaluate(async () => {46    const { scheduleWorkOnSiblingPath } = window["playwright"];47    await scheduleWorkOnSiblingPath("/path/to/sibling", () => {48      console.log("This is sibling page");49    });50  });51  await browser.close();52})();53const playwright = require("

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.evaluate(() => {7    window.parent.scheduleWorkOnParentPath('test.js');8  });9  await browser.close();10})();11const { chromium } = require('playwright');12(async () => {13  const browser = await chromium.launch();14  const context = await browser.newContext();15  const page = await context.newPage();16  await page.evaluate(() => {17    window.parent.scheduleWorkOnParentPath('test.js');18  });19  await browser.close();20})();

Using AI Code Generation

1const playwright = require('playwright');2const { scheduleWorkOnParentPath } = require('playwright/lib/server/browserContext');3(async () => {4  const browser = await playwright.chromium.launch();5  const context = await browser.newContext();6  await scheduleWorkOnParentPath(context, '/path/to/parent');7})();8const playwright = require('playwright');9const { scheduleWorkOnParentPath } = require('playwright/lib/server/browserContext');10(async () => {11  const browser = await playwright.chromium.launch();12  const context = await browser.newContext();13  await scheduleWorkOnParentPath(context, '/path/to/parent');14})();

Using AI Code Generation

1const playwright = require('playwright');2const { scheduleWorkOnParentPath } = require('playwright/lib/server/supplements/recorder/recorderSupplement');3(async () => {4  const browser = await playwright['chromium'].launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  await page.click('input[name="q"]');8  await scheduleWorkOnParentPath(page, '/html/body/div/div[2]/form/div[2]/div/div[2]/div[2]/div[2]/input');9  await page.type('input[name="q"]', 'Hello World!');10  await page.keyboard.press('Enter');11  await browser.close();12})();

Using AI Code Generation

1const path = require('path');2const { chromium } = require('playwright');3(async () => {4  const browser = await chromium.launch({5  });6  const context = await browser.newContext();7  const page = await context.newPage();8  const parentPath = path.dirname(page.frame()._url);9  await page.frame().scheduleWorkOnParentPath(parentPath);10  await page.waitForTimeout(10000);11  await browser.close();12})();

Using AI Code Generation

1const playwright = require('playwright');2const { scheduleWorkOnParentPath } = playwright.internal;3(async () => {4  const browser = await playwright.chromium.launch();5  const page = await browser.newPage();6  await scheduleWorkOnParentPath(page, '/docs/core-concepts');7  await page.screenshot({ path: 'example.png' });8  await browser.close();9})();10const playwright = require('playwright');11const { scheduleWorkOnParentPath } = playwright.internal;12(async () => {13  const browser = await playwright.chromium.launch();14  const page = await browser.newPage();15  await scheduleWorkOnParentPath(page, '/docs/core-concepts');16  await page.screenshot({ path: 'example.png' });17  await browser.close();18})();19const playwright = require('playwright');20const { scheduleWorkOnParentPath } = playwright.internal;21(async () => {22  const browser = await playwright.chromium.launch();23  const page = await browser.newPage();24  await scheduleWorkOnParentPath(page, '/docs/core-concepts');25  await page.screenshot({ path: 'example.png' });26  await browser.close();27})();28const playwright = require('playwright');29const { scheduleWorkOnParentPath } = playwright.internal;30(async () => {31  const browser = await playwright.chromium.launch();32  const page = await browser.newPage();33  await scheduleWorkOnParentPath(page, '/docs/core-concepts');34  await page.screenshot({ path: 'example.png' });35  await browser.close();36})();37const playwright = require('playwright');38const { scheduleWorkOnParentPath } = playwright.internal;39(async () => {40  const browser = await playwright.chromium.launch();41  const page = await browser.newPage();

Using AI Code Generation

1const { scheduleWorkOnParentPath } = require('playwright-core/lib/server/frames');2const { chromium } = require('playwright-core');3const path = require('path');4(async () => {5  const browser = await chromium.launch();6  const context = await browser.newContext();7  const page = await context.newPage();8  await scheduleWorkOnParentPath(page.mainFrame(), path.join(__dirname, 'child.html'));9  await page.waitForTimeout(1000);10  await browser.close();11})();12(async () => {13  const { scheduleWorkOnParentPath } = require('playwright-core/lib/server/frames');14  const { chromium } = require('playwright-core');15  const path = require('path');16  const browser = await chromium.launch();17  const context = await browser.newContext();18  const page = await context.newPage();19  await scheduleWorkOnParentPath(page.mainFrame(), path.join(__dirname, 'grandchild.html'));20  await page.waitForTimeout(1000);21  await browser.close();22})();23(async () => {24  const { chromium } = require('playwright-core');25  const browser = await chromium.launch();26  const context = await browser.newContext();27  const page = await context.newPage();28  await page.waitForTimeout(1000);29  await browser.close();30})();

StackOverFlow community discussions

Questions

Discussion

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?

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

Running Playwright in Azure Function

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

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

Blogs

Check out the latest blogs from LambdaTest on this topic:

Appium: Endgame and What’s Next? [Testμ 2022]

The automation backend architecture of Appium has undergone significant development along with the release of numerous new capabilities. With the advent of Appium, test engineers can cover mobile apps, desktop apps, Flutter apps, and more.

Desired Capabilities in Selenium Webdriver

Desired Capabilities is a class used to declare a set of basic requirements such as combinations of browsers, operating systems, browser versions, etc. to perform automated cross browser testing of a web application.

The Top 52 Selenium Open Source Projects On GitHub

Selenium, a project hosted by the Apache Software Foundation, is an umbrella open-source project comprising a variety of tools and libraries for test automation. Selenium automation framework enables QA engineers to perform automated web application testing using popular programming languages like Python, Java, JavaScript, C#, Ruby, and PHP.

Putting Together a Testing Team

As part of one of my consulting efforts, I worked with a mid-sized company that was looking to move toward a more agile manner of developing software. As with any shift in work style, there is some bewilderment and, for some, considerable anxiety. People are being challenged to leave their comfort zones and embrace a continuously changing, dynamic working environment. And, dare I say it, testing may be the most ‘disturbed’ of the software roles in agile development.

Unveiling Samsung Galaxy Z Fold4 For Mobile App Testing

Hey LambdaTesters! We’ve got something special for you this week. ????

Playwright tutorial

LambdaTest’s Playwright tutorial will give you a broader idea about the Playwright automation framework, its unique features, and use cases with examples to exceed your understanding of Playwright testing. This tutorial will give A to Z guidance, from installing the Playwright framework to some best practices and advanced concepts.

Chapters:

What is Playwright : Playwright is comparatively new but has gained good popularity. Get to know some history of the Playwright with some interesting facts connected with it.
How To Install Playwright : Learn in detail about what basic configuration and dependencies are required for installing Playwright and run a test. Get a step-by-step direction for installing the Playwright automation framework.
Playwright Futuristic Features: Launched in 2020, Playwright gained huge popularity quickly because of some obliging features such as Playwright Test Generator and Inspector, Playwright Reporter, Playwright auto-waiting mechanism and etc. Read up on those features to master Playwright testing.
What is Component Testing: Component testing in Playwright is a unique feature that allows a tester to test a single component of a web application without integrating them with other elements. Learn how to perform Component testing on the Playwright automation framework.
Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
Functions and Selectors in Playwright: Learn how to launch the Chromium browser with Playwright. Also, gain a better understanding of some important functions like “BrowserContext,” which allows you to run multiple browser sessions, and “newPage” which interacts with a page.
Handling Alerts and Dropdowns in Playwright : Playwright interact with different types of alerts and pop-ups, such as simple, confirmation, and prompt, and different types of dropdowns, such as single selector and multi-selector get your hands-on with handling alerts and dropdown in Playright testing.
Playwright vs Puppeteer: Get to know about the difference between two testing frameworks and how they are different than one another, which browsers they support, and what features they provide.
Run Playwright Tests on LambdaTest: Playwright testing with LambdaTest leverages test performance to the utmost. You can run multiple Playwright tests in Parallel with the LammbdaTest test cloud. Get a step-by-step guide to run your Playwright test on the LambdaTest platform.
Playwright Python Tutorial: Playwright automation framework support all major languages such as Python, JavaScript, TypeScript, .NET and etc. However, there are various advantages to Python end-to-end testing with Playwright because of its versatile utility. Get the hang of Playwright python testing with this chapter.
Playwright End To End Testing Tutorial: Get your hands on with Playwright end-to-end testing and learn to use some exciting features such as TraceViewer, Debugging, Networking, Component testing, Visual testing, and many more.
Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.