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How to use callWithErrorHandling method in Playwright Internal

Best JavaScript code snippet using playwright-internal

apiWatch2.js

Source:apiWatch2.js

...49    } 50    if ((process.env.NODE_ENV !== 'production')) { 51      checkRecursiveUpdates(seen, job) 52    } 53    callWithErrorHandling(job, null, 14 /* SCHEDULER */) 54  } 55  flushPostFlushCbs(seen) 56  isFlushing = false 57  // ä¸äº postFlushCb æ§è¡è¿ç¨ä¸ä¼åæ¬¡æ·»å å¼æ¥ä»»å¡ï¼éå½ flushJobs ä¼æå®ä»¬é½æ§è¡å®æ¯ 58  if (queue.length || postFlushCbs.length) { 59    flushJobs(seen) 60  } 61} 62function flushPostFlushCbs(seen) { 63  if (postFlushCbs.length) { 64    // æ·è´å¯æ¬ 65    const cbs = [...new Set(postFlushCbs)] 66    postFlushCbs.length = 0 67    if ((process.env.NODE_ENV !== 'production')) { 68      seen = seen || new Map() 69    } 70    for (let i = 0; i < cbs.length; i++) { 71      if ((process.env.NODE_ENV !== 'production')) {                                                       72        checkRecursiveUpdates(seen, cbs[i]) 73      } 74      cbs[i]() 75    } 76  } 77} 78const RECURSION_LIMIT = 100 79function checkRecursiveUpdates(seen, fn) { 80  if (!seen.has(fn)) { 81    seen.set(fn, 1) 82  } 83  else { 84    const count = seen.get(fn) 85    if (count > RECURSION_LIMIT) { 86      throw new Error('Maximum recursive updates exceeded. ' + 87        "You may have code that is mutating state in your component's " + 88        'render function or updated hook or watcher source function.') 89    } 90    else { 91      seen.set(fn, count + 1) 92    } 93  } 94} 95function queueFlush() { 96  if (!isFlushing) { 97    isFlushing = true 98    nextTick(flushJobs) 99  } 100} 101function flushJobs(seen) { 102  let job 103  if ((process.env.NODE_ENV !== 'production')) { 104    seen = seen || new Map() 105  } 106  queue.sort((a, b) => getId(a) - getId(b)) 107  while ((job = queue.shift()) !== undefined) { 108    if (job === null) { 109      continue 110    } 111    if ((process.env.NODE_ENV !== 'production')) { 112      checkRecursiveUpdates(seen, job) 113    } 114    callWithErrorHandling(job, null, 14 /* SCHEDULER */) 115  } 116  flushPostFlushCbs(seen) 117  if (queue.length || postFlushCbs.length) { 118    flushJobs(seen) 119  } 120  isFlushing = false 121} 122function watchEffect(effect, options) { 123  return doWatch(effect, null, options); 124} 125function doWatch(source, cb, { immediate, deep, flush, onTrack, onTrigger } = EMPTY_OBJ) { 126  instance = currentInstance; 127  let getter; 128  if (isFunction(source)) { 129    getter = () => { 130      if (instance && instance.isUnmounted) { 131        return; 132      } 133       // æ§è¡æ¸çå½æ° 134      if (cleanup) { 135        cleanup(); 136      } 137      // æ§è¡ source å½æ°ï¼ä¼ å¥ onInvalidate ä½ä¸ºåæ° 138      return callWithErrorHandling(source, instance, 3 /* WATCH_CALLBACK */, [onInvalidate]); 139    }; 140  } 141  let cleanup; 142  const onInvalidate = (fn) => { 143    cleanup = runner.options.onStop = () => { 144      callWithErrorHandling(fn, instance, 4 /* WATCH_CLEANUP */); 145    }; 146  }; 147  let scheduler; 148  // åå»º scheduler 149  if (flush === 'sync') { 150    scheduler = invoke; 151  } 152  else if (flush === 'pre') { 153    scheduler = job => { 154      if (!instance || instance.isMounted) { 155        queueJob(job); 156      } 157      else { 158        job(); ...

2_错误统一处理(减少用户心智负担).js

Source:2_错误统一处理(减少用户心智负担).js

...6 * @Description: æå¼koroFileHeaderæ¥çéç½® è¿è¡è®¾ç½®: https://github.com/OBKoro1/koro1FileHeader/wiki/%E9%85%8D%E7%BD%AE7 * @FilePath: \web\å¦ä¹ ä»£ç \ä¸ªäºº\vuejsè®¾è®¡ä¸å®ç°\2_æ¡æ¶è®¾è®¡çæ ¸å¿è¦ç´ \2_éè¯¯å¤ç.js8 */9let handleErr = null;10function callWithErrorHandling(fn) {11  try {12    fn && fn();13  } catch (error) {14    handleErr(error);15  }16}17export default {18  foo(fn) {19    callWithErrorHandling(fn); //æ¤æ¶è°ç¨çå½æ°æ¯æ·»å äºéè¯¯å¤ççå½æ°20  },21  registerErrorHandler(fn) {22    //å©ç¨éåæç¨æ·ä¼ çéè¯¯å¤çå½æ°å¨åèµ·æ¥23    handleErr = fn;24  },25};26//27// import utils from './2_éè¯¯å¤ç'28// utils.registerErrorHandler(err=>{  ç¨æ·ç´æ¥æ³¨åå¨å±çéè¯¯å¤çæ¹å¼ï¼å°±ä¸éè¦éå¤ç¼å29//     console.log(err);30// })...

api-watch.js

Source:api-watch.js

...5export const watchEffect = (cb, { onTrack, onTrigger } = {}) => {6  let cleanup7  const onInvalidate = (fn) => {8    cleanup = e.options.onStop = () => {9      callWithErrorHandling(fn, instance)10    }11  }12  const getter = () => {13    if (cleanup) {14      cleanup()15    }16    return callWithErrorHandling(cb, instance, [onInvalidate])17  }18  const scheduler = (job) => queueJob(() => afterPaint(job))19  const e = effect(getter, {20    onTrack,21    onTrigger,22    lazy: true,23    scheduler,24  })25  scheduler(e) // init run26  recordInstanceBoundEffect(e)27  const instance = getCurrentInstance()28  return () => {29    stop(e)30    if (instance) {...

utils.js

Source:utils.js

...5//     return obj && obj.bar6// }7let handlerError = null8export function bar(fn) {9    callWithErrorHandling(fn)10}11export function registerErrorHandler(fn){12    handlerError = fn13}14function callWithErrorHandling(fn) {15    try {16        fn && fn()17    } catch (e) {18        handlerError && handlerError(e)19    }...

utils1.js

Source:utils1.js

...15    } catch (e) {}16  },17  // 318  foo1(fn) {19    callWithErrorHandling(fn)20  },21  bar1(fn) {22    callWithErrorHandling(fn)23  }24}25function callWithErrorHandling(fn) {26  try {27    fn && fn()28  } catch (e) {29    console.log(e)30  }...

messageBoxFollow.js

Source:messageBoxFollow.js

...3import './messageBoxFollow.html';4Template.messageBoxFollow.events({5	'click .js-follow'() {6		const { tmid } = this;7		callWithErrorHandling('followMessage', { mid: tmid });8	},...

util.js

Source:util.js

1export default {2  foo (fn) {3    callWithErrorHandling(fn);4  },5  bar (obj) {6    callWithErrorHandling(fn);7  },8  registerErrorHandler(fn) {9    handleError = fn;10  }11}12function callWithErrorHandling(fn) {13  try {14    fn && fn();15  } catch (e) {16    handleError(e)17  }...

utils3.js

Source:utils3.js

1export default {2  foo(fn) {3    callWithErrorHandling(fn);4  },5  bar(fn) {6    callWithErrorHandling(fn);7  },8};9function callWithErrorHandling(fn) {10  try {11    fn && fn();12  } catch (e) {13    console.log(e);14  }...

Using AI Code Generation

1const { webkit } = require('playwright');2(async () => {3  const browser = await webkit.launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  const error = await page.evaluate(() => {7    return window.callWithErrorHandling(() => {8      throw new Error('Error');9    }, null, 'Error in user code');10  });11  console.log(error);12  await browser.close();13})();14    at Object.callWithErrorHandling (test.js:9:15)15    at Object.<anonymous> (test.js:15:26)16    at ExecutionContext._evaluateInternal (C:\Users\user\playwright\test\lib\server\chromium\chromium.js:177:19)17    at processTicksAndRejections (internal/process/task_queues.js:93:5)18    at async ExecutionContext.evaluate (C:\Users\user\playwright\test\lib\server\chromium\chromium.js:109:16)19    at async Page.evaluate (C:\Users\user\playwright\test\lib\server\chromium\chromium.js:109:16)20    at async Promise.all (index 0)

Using AI Code Generation

1const { callWithErrorHandling } = require('playwright/lib/utils/utils');2const { test } = require('@playwright/test');3test('test', async ({ page }) => {4  await callWithErrorHandling(async () => {5  }, page, 'goto');6});

Using AI Code Generation

1const { callWithErrorHandling } = require('playwright/lib/utils/utils');2const { test } = require('@playwright/test');3test('test', async ({ page }) => {4  await callWithErrorHandling(async () => {5  }, page, 'goto');6});

Using AI Code Generation

1const { callWithErrorHandling } = require('playwright/lib/utils/utils');2const { test } = require('@playwright/test');3test('test', async ({ page }) => {4  await callWithErrorHandling(async () => {5  }, page, 'goto');6});

Using AI Code Generation

1const { callWithErrorHandling } = require('playwright/lib/utils/utils');2const { test } = require('@playwright/test');3test('test', async ({ page }) => {4  await callWithErrorHandling(async () => {5  }, page, 'goto');6});

Using AI Code Generation

1const { callWithErrorHandling } = require('playwright/lib/internal/utils/stackTrace');2const { test } = require('@playwright/test');3test('test', async ({ page }) => {4  await callWithErrorHandling(async () => {5    await page.click('text=Get started');6  }, {}, 'error');7});8    at Object.test (test.js:8:5)9    at runTest (playwright/lib/test/testRunner.js:317:7)10    at runNextTest (playwright/lib/test/testRunner.js:280:7)11    at run (playwright/lib/test/testRunner.js:264:7)12    at runNextGroup (playwright/lib/test/testRunner.js:199:7)13    at run (playwright/lib/test/testRunner.js:193:7)14    at runWithBeforeHooks (playwright/lib/test/testRunner.js:165:7)15    at run (playwright/lib/test/testRunner.js:162:7)16    at runWithBeforeHooks (playwright/lib/test/testRunner.js:165:7)17    at run (playwright/lib/test/testRunner.js:162:7)18const { test } = require('@playwright/test');19test('test', async ({ page }) => {20  try {21    await page.click('text=Get started');22  } catch (error) {23    console.log(error.stack);24  }25});

Using AI Code Generation

1const { callWithErrorHandling } = require('playwright/lib/internal/utils/utils');2const { chromium } = require('playwright');3const path = require('path');4const fs = require('fs');5const { promisify } = require('util');6const readFileAsync = promisify(fs.readFile);7const writeFileAsync = promisify(fs.writeFile);8const appendFileAsync = promisify(fs.appendFile);9const unlinkAsync = promisify(fs.unlink);10(async () => {11  const browser = await chromium.launch({ headless: false });12  const context = await browser.newContext();13  const page = await context.newPage();14  await page.screenshot({ path: 'example.png' });15  const read = async () => {16    const data = await readFileAsync(path.join(__dirname, 'example.png'));17    return data;18  };19  const write = async (data) => {20    await writeFileAsync(path.join(__dirname, 'example1.png'), data);21  };22  const append = async (data) => {23    await appendFileAsync(path.join(__dirname, 'example1.png'), data);24  };25  const unlink = async () => {26    await unlinkAsync(path.join(__dirname, 'example1.png'));27  };28  const readWrite = async () => {29    const data = await read();30    await write(data);31  };32  const readAppend = async () => {33    const data = await read();34    await append(data);35  };36  const readUnlink = async () => {37    const data = await read();38    await unlink();39  };40  await callWithErrorHandling(readWrite, null, 'readWrite', [page]);41  await callWithErrorHandling(readAppend, null, 'readAppend', [page]);42  await callWithErrorHandling(readUnlink, null, 'readUnlink', [page]);43  await browser.close();44})();45const { test, expect } = require('@playwright/test');46test('test', async ({ page }) => {47  const title = page.locator('text="Playwright"');48  await expect(title).toBeVisible();49});50test('test1', async ({ page }) => {51  const title = page.locator('text="Playwright

Using AI Code Generation

1const {callWithErrorHandling} = require('playwright/lib/server/cr/crNetworkManager');2const {helper} = require('playwright/lib/server/helper');3const {events} = require('playwright/lib/server/events');4const {eventsHelper} = require('playwright/lib/server/eventsHelper');5const {ElementHandle} = require('playwright/lib/server/dom/elementHandle');6const {createJSHandle} = require('playwright/lib/server/dom/elementHandle');7const {Protocol} = require('playwright/lib/server/protocol');8const {ExecutionContext} = require('playwright/lib/server/executionContext');9const {Frame} = require('playwright/lib/server/dom/frame');10const {Page} = require('playwright/lib/server/dom/page');11const {createTestState, setupTestBrowserHooks, setupTestPageAndContextHooks} = require('./utils');12const test = base.extend(createTestState);13test.describe('Playwright Internal API', () => {14  test.beforeEach(async ({browser, server, context}) => {15    await context.addInitScript(() => {16      window.addEventListener('error', e => {17        console.log('error', e);18      });19    });20  });21  test('should throw error in the page', async ({browser, server, context}) => {22    const page = await context.newPage();23    const frame = page.mainFrame();24    const error = await callWithErrorHandling(25      async () => {26        await frame.evaluate(() => {27          throw new Error('error');28        });29      },30    );31    expect(error).toBeTruthy();32  });33  test('should throw error in the page - 2', async ({browser, server, context}) => {34    const page = await context.newPage();35    const frame = page.mainFrame();36    const error = await callWithErrorHandling(37      async () => {38        await frame.evaluate(() => {39          throw new Error('error');40        });41      },42    );43    expect(error).toBeTruthy();44  });45});

Using AI Code Generation

1const { callWithErrorHandling } = require('playwright/lib/helper');2(async () => {3    const error = await callWithErrorHandling(async () => {4        throw new Error('error');5    }, 'Error in test');6})();7const { callWithErrorHandling } = require('playwright/lib/helper');8(async () => {9    const error = await callWithErrorHandling(async () => {10        try {11            throw new Error('error');12        } catch (error) {13            throw error;14        }15    }, 'Error in test');16})();17const { callWithErrorHandling } = require('playwright/lib/helper');18(async () => {19    const error = await callWithErrorHandling(async () => {20        try {21            throw new Error('error');22        } catch (error) {23            throw error;24        }25    }, 'Error in test');26})();

Using AI Code Generation

1const { callWithErrorHandling } = require('playwright/lib/utils/stackTrace');2const { TimeoutError } = require('playwright/lib/errors');3const { helper } = require('playwright/lib/helper');4const { test, expect } = require('@playwright/test');5test('test', async ({page}) => {6  await callWithErrorHandling(async () => {7    await page.waitForSelector('foobar');8  }, 'page.waitForSelector', page, 'foobar', new TimeoutError('Timeout 30000ms exceeded.'));9  expect(await page.title()).toBe('Playwright');10});

StackOverFlow community discussions

Questions

Discussion

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

firefox browser does not start in playwright

Running Playwright in Azure Function

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?

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

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

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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.