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How to use invalidateContextProvider method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactFiberBeginWork.js

...196  markRef(current, workInProgress);197  const didCaptureError = (workInProgress.flags & DidCapture) !== NoFlags;198  if (!shouldUpdate && !didCaptureError) {199    if (hasContext) {200      invalidateContextProvider(workInProgress, Component, false);201    }202    return bailoutOnAlreadyFinishedWork(current, workInProgress, renderLanes);203  }204  const instance = workInProgress.stateNode;205  ReactCurrentOwner.current = workInProgress;206  let nextChildren;207  if (208    didCaptureError &&209    typeof Component.getDerivedStateFromError !== 'function'210  ) {211    nextChildren = null;212  } else {213    nextChildren = instance.render();214  }215  console.log({ ...nextChildren }, '-------finishClassComponent:nextChildren');216  workInProgress.flags |= PerformedWork;217  if (current !== null && didCaptureError) {218    forceUnmountCurrentAndReconcile(219      current,220      workInProgress,221      nextChildren,222      renderLanes223    );224  } else {225    reconcileChildren(current, workInProgress, nextChildren, renderLanes);226  }227  workInProgress.memoizedState = instance.state;228  if (hasContext) {229    invalidateContextProvider(workInProgress, Component, true);230  }231  return workInProgress.child;232};233const updateClassComponent = (234  current,235  workInProgress,236  Component,237  nextProps,238  renderLanes239) => {240  let hasContext;241  if (isContextProvider(Component)) {242    hasContext = true;243    pushContextProvider(workInProgress);...

ReactFiberContext.new.js

Source: ReactFiberContext.new.js

...216    );217    return true;218  }219}220function invalidateContextProvider(221  workInProgress: Fiber,222  type: any,223  didChange: boolean,224): void {225  if (disableLegacyContext) {226    return;227  } else {228    const instance = workInProgress.stateNode;229    invariant(230      instance,231      'Expected to have an instance by this point. ' +232        'This error is likely caused by a bug in React. Please file an issue.',233    );234    if (didChange) {...

ReactFiberContext.old.js

Source: ReactFiberContext.old.js

...216    );217    return true;218  }219}220function invalidateContextProvider(221  workInProgress: Fiber,222  type: any,223  didChange: boolean,224): void {225  if (disableLegacyContext) {226    return;227  } else {228    const instance = workInProgress.stateNode;229    invariant(230      instance,231      'Expected to have an instance by this point. ' +232        'This error is likely caused by a bug in React. Please file an issue.',233    );234    if (didChange) {...

updateClassComponent.js

Source: updateClassComponent.js

...4445    if (!shouldUpdate && !didCaptureError) {46      // Context providers should defer to sCU for rendering47      if (hasContext) {48        invalidateContextProvider(workInProgress, false);49      }5051      return bailoutOnAlreadyFinishedWork(current, workInProgress);52    }5354    var ctor = workInProgress.type;55    var instance = workInProgress.stateNode;5657    // Rerender58    // æ¸²æç»ä»¶59    ReactCurrentOwner.current = workInProgress;60    var nextChildren = void 0;61    if (didCaptureError && (!enableGetDerivedStateFromCatch || typeof ctor.getDerivedStateFromCatch !== 'function')) {62      // If we captured an error, but getDerivedStateFrom catch is not defined,63      // unmount all the children. componentDidCatch will schedule an update to64      // re-render a fallback. This is temporary until we migrate everyone to65      // the new API.66      // TODO: Warn in a future release.67      nextChildren = null;68    } else {69      {70        ReactDebugCurrentFiber.setCurrentPhase('render');7172        // è°ç¨ ç»ä»¶çrenderæ¹æ³73        nextChildren = instance.render();74        if (debugRenderPhaseSideEffects || debugRenderPhaseSideEffectsForStrictMode && workInProgress.mode & StrictMode) {75          instance.render();76        }77        ReactDebugCurrentFiber.setCurrentPhase(null);78      }79    }8081    // React DevTools reads this flag.82    workInProgress.effectTag |= PerformedWork;83    if (didCaptureError) {84      // If we're recovering from an error, reconcile twice: first to delete85      // all the existing children.86      reconcileChildrenAtExpirationTime(current, workInProgress, null, renderExpirationTime);87      workInProgress.child = null;88      // Now we can continue reconciling like normal. This has the effect of89      // remounting all children regardless of whether their their90      // identity matches.91    }9293    // è°èæ´æ°94    reconcileChildrenAtExpirationTime(current, workInProgress, nextChildren, renderExpirationTime);95    // Memoize props and state using the values we just used to render.96    // TODO: Restructure so we never read values from the instance.97    memoizeState(workInProgress, instance.state);98    memoizeProps(workInProgress, instance.props);99100    // The context might have changed so we need to recalculate it.101    if (hasContext) {102      invalidateContextProvider(workInProgress, true);103    }104105    return workInProgress.child;
...

ReactFiberContext.js

Source: ReactFiberContext.js

1import { ClassComponent, HostRoot } from './ReactWorkTags';2import { createCursor, push, pop } from './ReactFiberStack';3const emptyContextObject = {};4const contextStackCursor = createCursor(emptyContextObject);5const didPerformWorkStackCursor = createCursor(false);6let previousContext = emptyContextObject;7const isContextProvider = (type) => {8  const { childContextTypes } = type;9  return childContextTypes !== null && childContextTypes !== undefined;10};11const popContext = (fiber) => {12  pop(didPerformWorkStackCursor, fiber);13  pop(contextStackCursor, fiber);14};15const findCurrentUnmaskedContext = (fiber) => {16  let node = fiber;17  do {18    switch (node.tag) {19      case HostRoot:20        return node.stateNode.context;21      case ClassComponent: {22        const Component = node.type;23        if (isContextProvider(Component)) {24          return node.stateNode.__reactInternalMemoizedMergedChildContext;25        }26        break;27      }28    }29    node = node.return;30  } while (node !== null);31};32const processChildContext = (fiber, type, parentContext) => {33  const instance = fiber.stateNode;34  if (typeof instance.getChildContext !== 'function') return parentContext;35  const childContext = instance.getChildContext();36  return { ...parentContext, ...childContext };37};38const hasContextChanged = () => didPerformWorkStackCursor.current;39const pushTopLevelContextObject = (fiber, context, didChange) => {40  push(contextStackCursor, context, fiber);41  push(didPerformWorkStackCursor, didChange, fiber);42};43const popTopLevelContextObject = (fiber) => {44  pop(didPerformWorkStackCursor, fiber);45  pop(contextStackCursor, fiber);46};47const pushContextProvider = (workInProgress) => {48  const instance = workInProgress.stateNode;49  const memoizedMergedChildContext =50    (instance && instance.__reactInternalMemoizedMergedChildContext) ||51    emptyContextObject;52  previousContext = contextStackCursor.current;53  push(contextStackCursor, memoizedMergedChildContext, workInProgress);54  push(55    didPerformWorkStackCursor,56    didPerformWorkStackCursor.current,57    workInProgress58  );59  return true;60};61const getUnmaskedContext = (62  workInProgress,63  Component,64  didPushOwnContextIfProvider65) => {66  if (didPushOwnContextIfProvider && isContextProvider(Component)) {67    return previousContext;68  }69  return contextStackCursor.current;70};71const cacheContext = (workInProgress, unmaskedContext, maskedContext) => {72  const instance = workInProgress.stateNode;73  instance.__reactInternalMemoizedUnmaskedChildContext = unmaskedContext;74  instance.__reactInternalMemoizedMaskedChildContext = maskedContext;75};76const getMaskedContext = (workInProgress, unmaskedContext) => {77  const type = workInProgress.type;78  const contextTypes = type.contextTypes;79  if (!contextTypes) return emptyContextObject;80  const instance = workInProgress.stateNode;81  if (82    instance &&83    instance.__reactInternalMemoizedUnmaskedChildContext === unmaskedContext84  ) {85    return instance.__reactInternalMemoizedMaskedChildContext;86  }87  const context = {};88  for (const key in contextTypes) {89    context[key] = unmaskedContext[key];90  }91  if (instance) {92    cacheContext(workInProgress, unmaskedContext, context);93  }94  return context;95};96const invalidateContextProvider = (workInProgress, type, didChange) => {97  const instance = workInProgress.stateNode;98  invariant(99    instance,100    'Expected to have an instance by this point. ' +101      'This error is likely caused by a bug in React. Please file an issue.'102  );103  if (didChange) {104    const mergedContext = processChildContext(105      workInProgress,106      type,107      previousContext108    );109    instance.__reactInternalMemoizedMergedChildContext = mergedContext;110    pop(didPerformWorkStackCursor, workInProgress);111    pop(contextStackCursor, workInProgress);112    push(contextStackCursor, mergedContext, workInProgress);113    push(didPerformWorkStackCursor, didChange, workInProgress);114  } else {115    pop(didPerformWorkStackCursor, workInProgress);116    push(didPerformWorkStackCursor, didChange, workInProgress);117  }118};119export {120  emptyContextObject,121  isContextProvider,122  popContext,123  findCurrentUnmaskedContext,124  processChildContext,125  hasContextChanged,126  pushTopLevelContextObject,127  popTopLevelContextObject,128  pushContextProvider,129  getUnmaskedContext,130  getMaskedContext,131  cacheContext,132  invalidateContextProvider,...

lifecycle.js

Source: lifecycle.js

...58  reconcileChildren(current, workInProgress, children);59  workInProgress.memoizedState = instance;60  61  if (hasContext) {62    invalidateContextProvider(workInProgress, Constructor, true)63  }64  return workInProgress.child;65}66function mountChildFiber (returnFiber, currentFirstChild, child) {67  const isObj = isObject(child) && isNull(child);68  if (isObj) {69    switch (child.$$typeof) {70      case REACT_ELEMENT_TYPE:71        return replaceSingleChild();72      case REACT_PORTAL_TYPE:73        return placeSingleChild()74    }75  }76}...

context.js

Source: context.js

1import { isFunction, EMPTY_CONTEXT, keys, assign } from '../shared';2const previousContext = {};3export function cacheContext () {4}5export function pushHostContext (workInProgress) {6  const instance = requiredContext()7}8export function requiredContext () {9}10export function processChildContext (workInProgress, Constructor, parentContext) {11  const instance = workInProgress.stateNode;12  if (isFunction(instance.getChildContext)) {13    const childContext = instance.getChildContext();14    return assign({}, parentContext, childContext);15  }16  return parentContext;17}18export function getUnmaskedContext (workInProgress, constructor, did) {19}20export function getMaskedContext (workInProgress, unmaskedContext) {21  const type = workInProgress.type;22  const contextTypes = type.contextTypes;23  if (contextTypes) {24    const instance = workInProgress.stateNode;25    const reactInternalMemoizedMaskedChildContext = instance._reactInternalMemoizedMaskedChildContext;26    if (instance && reactInternalMemoizedMaskedChildContext === unmaskedContext) {27      return reactInternalMemoizedMaskedChildContext;28    }29    const context = {};30    keys(contextTypes).forEach(key => context[key] = unmaskedContext[key]);31    if (instance) {32      cacheContext()33    }34  }35  return EMPTY_CONTEXT;36}37export function invalidateContextProvider (workInProgress, Constructor, didChange) {38  const { instance } = workInProgress.stateNode;39  if (didChange) {40    const mergedContext = processChildContext(workInProgress, Constructor, previousContext);41    instance.__reactInternalMemoizedMergedChildContext = mergedContext;42    // todo43    // pop(xxxx);44  } else {45    // todo 46    //pop(xxxx);47  }...

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 context._invalidate();7  await browser.close();8})();9const { chromium } = require('playwright');10(async () => {11  const browser = await chromium.launch();12  const context = await browser.newContext();13  const page = await context.newPage();14  await context._invalidate();15  await browser.close();16})();17const { chromium } = require('playwright');18(async () => {19  const browser = await chromium.launch();20  const context = await browser.newContext();21  const page = await context.newPage();22  await context._invalidate();23  await browser.close();24})();

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.screenshot({ path: `example.png` });7  await context.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.screenshot({ path: `example.png` });16  await context.close();17  await browser.close();18})();19const { chromium } = require('playwright');20(async () => {21  const browser = await chromium.launch();22  const context = await browser.newContext();23  const page = await context.newPage();24  await page.screenshot({ path: `example.png` });25  await context.close();26  await browser.close();27})();28const { chromium } = require('playwright');29(async () => {30  const browser = await chromium.launch();31  const context = await browser.newContext();32  const page = await context.newPage();33  await page.screenshot({ path: `example.png` });34  await context.close();35  await browser.close();36})();37const { chromium } = require('playwright');38(async () => {39  const browser = await chromium.launch();40  const context = await browser.newContext();41  const page = await context.newPage();42  await page.screenshot({ path: `example.png` });43  await context.close();44  await browser.close();45})();46const { chromium } = require('playwright');47(async () => {48  const browser = await chromium.launch();49  const context = await browser.newContext();50  const page = await context.newPage();51  await page.goto('https

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 context.close();7  await browser.close();8})();9page._delegate._invalidateContextProvider();

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const context = await browser.newContext();5  await context.addCookies([{ name: 'foo', value: 'bar' }]);6  await context.close();7  await browser.close();8})();9const { chromium } = require('playwright');10(async () => {11  const browser = await chromium.launch();12  const context = await browser.newContext();13  await context.addCookies([{ name: 'foo', value: 'bar' }]);14  await context.close();15  await browser.close();16})();17const { chromium } = require('playwright');18(async () => {19  const browser = await chromium.launch();20  const context = await browser.newContext();21  await context.addCookies([{ name: 'foo', value: 'bar' }]);22  await context.close();23  await browser.close();24})();25const { chromium } = require('playwright');26(async () => {27  const browser = await chromium.launch();28  const context = await browser.newContext();29  await context.addCookies([{ name: 'foo', value: 'bar' }]);30  await context.close();31  await browser.close();32})();33const { chromium } = require('playwright');34(async () => {35  const browser = await chromium.launch();36  const context = await browser.newContext();37  await context.addCookies([{ name: 'foo', value: 'bar' }]);38  await context.close();39  await browser.close();40})();41const { chromium } = require('playwright');42(async () => {43  const browser = await chromium.launch();44  const context = await browser.newContext();45  await context.addCookies([{ name: 'foo', value: 'bar' }]);46  await context.close();47  await browser.close();48})();49const { chromium } = require('playwright');50(async () => {51  const browser = await chromium.launch();

Using AI Code Generation

1const { chromium, webkit, firefox, devices } = require('playwright');2const { invalidateContextProvider } = require('playwright/lib/server/browserContext');3(async () => {4  const browser = await chromium.launch();5  const context = await browser.newContext();6  await context.newPage();7  await context.close();8  await browser.close();9  invalidateContextProvider();10})();

Using AI Code Generation

1await page.context().invalidateContextProvider();2await page.context().invalidateContextProvider();3await page.context().invalidateContextProvider();4await page.context().invalidateContextProvider();5await page.context().invalidateContextProvider();6await page.context().invalidateContextProvider();7await page.context().invalidateContextProvider();8await page.context().invalidateContextProvider();9await page.context().invalidateContextProvider();10await page.context().invalidateContextProvider();11await page.context().invalidateContextProvider();12await page.context().invalidateContextProvider();13await page.context().invalidateContextProvider();14await page.context().invalidateContextProvider();15await page.context().invalidateContextProvider();16await page.context().invalidateContextProvider();17await page.context().invalidateContextProvider();18await page.context().invalidateContextProvider();19await page.context().invalidateContextProvider();20await page.context().invalidateContextProvider();

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 context.close();7  await browser.close();8})();9This is because the context.close() call is made before the page.goto() call is made. This is because the

Using AI Code Generation

1const { context } = require('@playwright/test');2const { contextController } = require('@playwright/test/lib/server/context');3const { contextDispatcher } = require('@playwright/test/lib/server/dispatchers');4const { contextOwner } = require('@playwright/test/lib/server/frames');5const contextController = contextController.get(context);6const contextDispatcher = contextDispatcher.get(contextController);7const contextOwner = contextOwner.get(contextDispatcher);8contextOwner.invalidateContextProvider();9const context = contextController.context();10const browser = context.browser();11const browserType = browser.browserType();12const browserName = browserType.name();13const browserVersion = browserType.version();14const browserExecutablePath = browserType.executablePath();15const browserChannel = browserType.channel();16const browserIsChromium = browserType.isChromium();17const browserIsFirefox = browserType.isFirefox();18const browserIsWebKit = browserType.isWebKit();19const browserLaunchOptions = browserType._launchOptions;20const browserDefaultArgs = browserType._defaultArgs;21const browserLaunchPersistentContextOptions = browserType._launchPersistentContextOptions;22const browserLaunchServerOptions = browserType._launchServerOptions;23const browserExecutablePath = browserType._executablePath;24const browserIsPuppeteerCore = browserType._isPuppeteerCore;25const browserIsPuppeteerFirefox = browserType._isPuppeteerFirefox;

Using AI Code Generation

1const page = await browser.newPage();2await page.evaluate(() => {3  window['PlaywrightInternal'].invalidateContextProvider();4});5await page.screenshot({ path: 'test.png' });6const browser = await chromium.launch();7await browser.evaluate(() => {8  window['PlaywrightInternal'].invalidateContextProvider();9});10const page = await browser.newPage();11await page.screenshot({ path: 'test.png' });12const browser = await chromium.launch();13const context = await browser.newContext();14await context.evaluate(() => {15  window['PlaywrightInternal'].invalidateContextProvider();16});17const page = await context.newPage();18await page.screenshot({ path: 'test.png' });19const browser = await chromium.launch();20const page = await browser.newPage();21const frame = await page.mainFrame();22await frame.evaluate(() => {23  window['PlaywrightInternal'].invalidateContextProvider();24});25await page.screenshot({ path: 'test.png' });26const browser = await chromium.launch();27const page = await browser.newPage();28const elementHandle = await page.$('input');29await elementHandle.evaluate(() => {30  window['PlaywrightInternal'].invalidateContextProvider();31});32await elementHandle.screenshot({ path: 'test.png' });33const browser = await chromium.launch();34const page = await browser.newPage();35const jsHandle = await page.evaluateHandle(() => document.body);36await jsHandle.evaluate(() => {37  window['PlaywrightInternal'].invalidateContextProvider();38});39await jsHandle.screenshot({ path: 'test.png' });40const browser = await chromium.launch();41const page = await browser.newPage();42const jsHandle = await page.evaluateHandle(() => document

StackOverFlow community discussions

Questions

Discussion

Running Playwright in Azure Function

firefox browser does not start in playwright

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

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

firefox browser does not start in playwright

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

I played with your example for a while and I got the same errors. These are the things I found that made my example work:

It must be Linux. I know that you mentioned that you picked a Linux plan. But I found that in VS Code that part is hidden, and on the Web the default is Windows. This is important because only the Linux plan runs npm install on the server.

Make sure that you are building on the server. You can find this option in the VS Code Settings:

Make sure you set the environment variable PLAYWRIGHT_BROWSERS_PATH, before making the publish.

https://stackoverflow.com/questions/63949978/running-playwright-in-azure-function

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

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

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

Blogs

Check out the latest blogs from LambdaTest on this topic:

Introducing LambdaTest Analytics: Test Reporting Made Awesome ????

Collecting and examining data from multiple sources can be a tedious process. The digital world is constantly evolving. To stay competitive in this fast-paced environment, businesses must frequently test their products and services. While it’s easy to collect raw data from multiple sources, it’s far more complex to interpret it properly.

A Step-By-Step Guide To Cypress API Testing

API (Application Programming Interface) is a set of definitions and protocols for building and integrating applications. It’s occasionally referred to as a contract between an information provider and an information user establishing the content required from the consumer and the content needed by the producer.

Digital transformation – part 3 – My view

Digital transformation - part 3

Getting Rid of Technical Debt in Agile Projects

Technical debt was originally defined as code restructuring, but in today’s fast-paced software delivery environment, it has evolved. Technical debt may be anything that the software development team puts off for later, such as ineffective code, unfixed defects, lacking unit tests, excessive manual tests, or missing automated tests. And, like financial debt, it is challenging to pay back.

Webinar: Move Forward With An Effective Test Automation Strategy [Voices of Community]

The key to successful test automation is to focus on tasks that maximize the return on investment (ROI), ensuring that you are automating the right tests and automating them in the right way. This is where test automation strategies come into play.

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.