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How to use mergeIntoWithNoDuplicateKeys method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactClass.js

...171      !!isInherited ? process.env.NODE_ENV !== 'production' ? invariant(false, 'ReactClass: You are attempting to define ' + '`%s` on your component more than once. This conflict may be ' + 'due to a mixin.', name) : invariant(false) : undefined;172      Constructor[name] = property;173    }174  }175  function mergeIntoWithNoDuplicateKeys(one, two) {176    !(one && two && typeof one === 'object' && typeof two === 'object') ? process.env.NODE_ENV !== 'production' ? invariant(false, 'mergeIntoWithNoDuplicateKeys(): Cannot merge non-objects.') : invariant(false) : undefined;177    for (var key in two) {178      if (two.hasOwnProperty(key)) {179        !(one[key] === undefined) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'mergeIntoWithNoDuplicateKeys(): ' + 'Tried to merge two objects with the same key: `%s`. This conflict ' + 'may be due to a mixin; in particular, this may be caused by two ' + 'getInitialState() or getDefaultProps() methods returning objects ' + 'with clashing keys.', key) : invariant(false) : undefined;180        one[key] = two[key];181      }182    }183    return one;184  }185  function createMergedResultFunction(one, two) {186    return function mergedResult() {187      var a = one.apply(this, arguments);188      var b = two.apply(this, arguments);189      if (a == null) {190        return b;191      } else if (b == null) {192        return a;193      }194      var c = {};195      mergeIntoWithNoDuplicateKeys(c, a);196      mergeIntoWithNoDuplicateKeys(c, b);197      return c;198    };199  }200  function createChainedFunction(one, two) {201    return function chainedFunction() {202      one.apply(this, arguments);203      two.apply(this, arguments);204    };205  }206  function bindAutoBindMethod(component, method) {207    var boundMethod = method.bind(component);208    if (process.env.NODE_ENV !== 'production') {209      boundMethod.__reactBoundContext = component;210      boundMethod.__reactBoundMethod = method;...

e6c8b6ReactClass.js

Source: e6c8b6ReactClass.js

...159    !!isInherited ? process.env.NODE_ENV !== 'production' ? invariant(false, 'ReactClass: You are attempting to define `%s` on your component more than once. This conflict may be due to a mixin.', name) : _prodInvariant('79', name) : void 0;160    Constructor[name] = property;161  }162}163function mergeIntoWithNoDuplicateKeys(one, two) {164  !(one && two && typeof one === 'object' && typeof two === 'object') ? process.env.NODE_ENV !== 'production' ? invariant(false, 'mergeIntoWithNoDuplicateKeys(): Cannot merge non-objects.') : _prodInvariant('80') : void 0;165  for (var key in two) {166    if (two.hasOwnProperty(key)) {167      !(one[key] === undefined) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'mergeIntoWithNoDuplicateKeys(): Tried to merge two objects with the same key: `%s`. This conflict may be due to a mixin; in particular, this may be caused by two getInitialState() or getDefaultProps() methods returning objects with clashing keys.', key) : _prodInvariant('81', key) : void 0;168      one[key] = two[key];169    }170  }171  return one;172}173function createMergedResultFunction(one, two) {174  return function mergedResult() {175    var a = one.apply(this, arguments);176    var b = two.apply(this, arguments);177    if (a == null) {178      return b;179    } else if (b == null) {180      return a;181    }182    var c = {};183    mergeIntoWithNoDuplicateKeys(c, a);184    mergeIntoWithNoDuplicateKeys(c, b);185    return c;186  };187}188function createChainedFunction(one, two) {189  return function chainedFunction() {190    one.apply(this, arguments);191    two.apply(this, arguments);192  };193}194function bindAutoBindMethod(component, method) {195  var boundMethod = method.bind(component);196  if (process.env.NODE_ENV !== 'production') {197    boundMethod.__reactBoundContext = component;198    boundMethod.__reactBoundMethod = method;...

b572cfReactClass.js

Source: b572cfReactClass.js

...159    !!isInherited ? process.env.NODE_ENV !== 'production' ? invariant(false, 'ReactClass: You are attempting to define `%s` on your component more than once. This conflict may be due to a mixin.', name) : _prodInvariant('79', name) : void 0;160    Constructor[name] = property;161  }162}163function mergeIntoWithNoDuplicateKeys(one, two) {164  !(one && two && typeof one === 'object' && typeof two === 'object') ? process.env.NODE_ENV !== 'production' ? invariant(false, 'mergeIntoWithNoDuplicateKeys(): Cannot merge non-objects.') : _prodInvariant('80') : void 0;165  for (var key in two) {166    if (two.hasOwnProperty(key)) {167      !(one[key] === undefined) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'mergeIntoWithNoDuplicateKeys(): Tried to merge two objects with the same key: `%s`. This conflict may be due to a mixin; in particular, this may be caused by two getInitialState() or getDefaultProps() methods returning objects with clashing keys.', key) : _prodInvariant('81', key) : void 0;168      one[key] = two[key];169    }170  }171  return one;172}173function createMergedResultFunction(one, two) {174  return function mergedResult() {175    var a = one.apply(this, arguments);176    var b = two.apply(this, arguments);177    if (a == null) {178      return b;179    } else if (b == null) {180      return a;181    }182    var c = {};183    mergeIntoWithNoDuplicateKeys(c, a);184    mergeIntoWithNoDuplicateKeys(c, b);185    return c;186  };187}188function createChainedFunction(one, two) {189  return function chainedFunction() {190    one.apply(this, arguments);191    two.apply(this, arguments);192  };193}194function bindAutoBindMethod(component, method) {195  var boundMethod = method.bind(component);196  if (process.env.NODE_ENV !== 'production') {197    boundMethod.__reactBoundContext = component;198    boundMethod.__reactBoundMethod = method;...

d34bd1ReactClass.js

Source: d34bd1ReactClass.js

...158    !!isInherited ? process.env.NODE_ENV !== 'production' ? invariant(false, 'ReactClass: You are attempting to define `%s` on your component more than once. This conflict may be due to a mixin.', name) : _prodInvariant('79', name) : void 0;159    Constructor[name] = property;160  }161}162function mergeIntoWithNoDuplicateKeys(one, two) {163  !(one && two && typeof one === 'object' && typeof two === 'object') ? process.env.NODE_ENV !== 'production' ? invariant(false, 'mergeIntoWithNoDuplicateKeys(): Cannot merge non-objects.') : _prodInvariant('80') : void 0;164  for (var key in two) {165    if (two.hasOwnProperty(key)) {166      !(one[key] === undefined) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'mergeIntoWithNoDuplicateKeys(): Tried to merge two objects with the same key: `%s`. This conflict may be due to a mixin; in particular, this may be caused by two getInitialState() or getDefaultProps() methods returning objects with clashing keys.', key) : _prodInvariant('81', key) : void 0;167      one[key] = two[key];168    }169  }170  return one;171}172function createMergedResultFunction(one, two) {173  return function mergedResult() {174    var a = one.apply(this, arguments);175    var b = two.apply(this, arguments);176    if (a == null) {177      return b;178    } else if (b == null) {179      return a;180    }181    var c = {};182    mergeIntoWithNoDuplicateKeys(c, a);183    mergeIntoWithNoDuplicateKeys(c, b);184    return c;185  };186}187function createChainedFunction(one, two) {188  return function chainedFunction() {189    one.apply(this, arguments);190    two.apply(this, arguments);191  };192}193function bindAutoBindMethod(component, method) {194  var boundMethod = method.bind(component);195  if (process.env.NODE_ENV !== 'production') {196    boundMethod.__reactBoundContext = component;197    boundMethod.__reactBoundMethod = method;...

02bee0e2981480e2da40c129fc40aeec84a575ReactClass.js

Source: 02bee0e2981480e2da40c129fc40aeec84a575ReactClass.js

...158    !!isInherited ? process.env.NODE_ENV !== 'production' ? invariant(false, 'ReactClass: You are attempting to define `%s` on your component more than once. This conflict may be due to a mixin.', name) : _prodInvariant('79', name) : void 0;159    Constructor[name] = property;160  }161}162function mergeIntoWithNoDuplicateKeys(one, two) {163  !(one && two && typeof one === 'object' && typeof two === 'object') ? process.env.NODE_ENV !== 'production' ? invariant(false, 'mergeIntoWithNoDuplicateKeys(): Cannot merge non-objects.') : _prodInvariant('80') : void 0;164  for (var key in two) {165    if (two.hasOwnProperty(key)) {166      !(one[key] === undefined) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'mergeIntoWithNoDuplicateKeys(): Tried to merge two objects with the same key: `%s`. This conflict may be due to a mixin; in particular, this may be caused by two getInitialState() or getDefaultProps() methods returning objects with clashing keys.', key) : _prodInvariant('81', key) : void 0;167      one[key] = two[key];168    }169  }170  return one;171}172function createMergedResultFunction(one, two) {173  return function mergedResult() {174    var a = one.apply(this, arguments);175    var b = two.apply(this, arguments);176    if (a == null) {177      return b;178    } else if (b == null) {179      return a;180    }181    var c = {};182    mergeIntoWithNoDuplicateKeys(c, a);183    mergeIntoWithNoDuplicateKeys(c, b);184    return c;185  };186}187function createChainedFunction(one, two) {188  return function chainedFunction() {189    one.apply(this, arguments);190    two.apply(this, arguments);191  };192}193function bindAutoBindMethod(component, method) {194  var boundMethod = method.bind(component);195  if (process.env.NODE_ENV !== 'production') {196    boundMethod.__reactBoundContext = component;197    boundMethod.__reactBoundMethod = method;...

c1d7cbReactClass.js

Source: c1d7cbReactClass.js

...158!!isInherited?process.env.NODE_ENV!=='production'?invariant(false,'ReactClass: You are attempting to define `%s` on your component more than once. This conflict may be due to a mixin.',name):_prodInvariant('79',name):void 0;159Constructor[name]=property;160}161}162function mergeIntoWithNoDuplicateKeys(one,two){163!(one&&two&&typeof one==='object'&&typeof two==='object')?process.env.NODE_ENV!=='production'?invariant(false,'mergeIntoWithNoDuplicateKeys(): Cannot merge non-objects.'):_prodInvariant('80'):void 0;164for(var key in two){165if(two.hasOwnProperty(key)){166!(one[key]===undefined)?process.env.NODE_ENV!=='production'?invariant(false,'mergeIntoWithNoDuplicateKeys(): Tried to merge two objects with the same key: `%s`. This conflict may be due to a mixin; in particular, this may be caused by two getInitialState() or getDefaultProps() methods returning objects with clashing keys.',key):_prodInvariant('81',key):void 0;167one[key]=two[key];168}169}170return one;171}172function createMergedResultFunction(one,two){173return function mergedResult(){174var a=one.apply(this,arguments);175var b=two.apply(this,arguments);176if(a==null){177return b;178}else if(b==null){179return a;180}181var c={};182mergeIntoWithNoDuplicateKeys(c,a);183mergeIntoWithNoDuplicateKeys(c,b);184return c;185};186}187function createChainedFunction(one,two){188return function chainedFunction(){189one.apply(this,arguments);190two.apply(this,arguments);191};192}193function bindAutoBindMethod(component,method){194var boundMethod=method.bind(component);195if(process.env.NODE_ENV!=='production'){196boundMethod.__reactBoundContext=component;197boundMethod.__reactBoundMethod=method;...

mergeIntoWithNoDuplicateKeys.js

Source: mergeIntoWithNoDuplicateKeys.js

...5 * @param {object} one The first object, which is mutated.6 * @param {object} two The second object7 * @return {object} one after it has been mutated to contain everything in two.8 */9function mergeIntoWithNoDuplicateKeys(one, two) {10  !(one && two && typeof one === 'object' && typeof two === 'object') ? 11	process.env.NODE_ENV !== 'production' ? 12		// mergeIntoWithNoDuplicateKeys: ä¸è½åå¹¶éå¯¹è±¡ç±»å13		invariant(14			false, 15			'mergeIntoWithNoDuplicateKeys(): Cannot merge non-objects.'16		) : _prodInvariant('80') : void 0;17  for (var key in two) {18    if (two.hasOwnProperty(key)) {19    	!(one[key] === undefined) ? 20	process.env.NODE_ENV !== 'production' ? 21		// mergeIntoWithNoDuplicateKeys: è¯å¾åå¹¶ä¸¤ä¸ªå¯¹è±¡ä¸ç¸åçkey: key22		// è¿å¯è½æ¯ç±äºmixinå²çª;23		// ç¹å«è¿å¯è½æ¯ç±äºä¸¤ä¸ªgetInitialState()ægetDefaultProps()æ¹æ³24		// è¿åå¯¹è±¡keyå²çªé æç25		invariant(26			false, 27			'mergeIntoWithNoDuplicateKeys(): \ 28			Tried to merge two objects with the same key: `%s`. \ 29			This conflict may be due to a mixin; \ 30			in particular, this may be caused by two getInitialState() or getDefaultProps() methods \31			returning objects with clashing keys.', 32			key) : _prodInvariant('81', key) : void 0;33    	one[key] = two[key];34    }35  }36  return one;...

createMergedResultFunction.js

Source: createMergedResultFunction.js

...15    } else if (b == null) {16      return a;17    }18    var c = {};19    mergeIntoWithNoDuplicateKeys(c, a);20    mergeIntoWithNoDuplicateKeys(c, b);21    return c;22  };...

Using AI Code Generation

1import { mergeIntoWithNoDuplicateKeys } from '@playwright/test/lib/utils/utils';2const obj1 = {3};4const obj2 = {5};6const obj3 = {7};8const mergedObj = mergeIntoWithNoDuplicateKeys({}, obj1, obj2, obj3);9console.log(mergedObj);

Using AI Code Generation

1const { mergeIntoWithNoDuplicateKeys } = require('playwright/lib/utils/utils');2const obj1 = { a: 1, b: 2, c: 3, d: 4 };3const obj2 = { a: 5, b: 6, e: 7 };4const obj3 = { a: 8, f: 9, g: 10 };5mergeIntoWithNoDuplicateKeys(obj1, obj2, obj3);6console.log(obj1);

Using AI Code Generation

1const { mergeIntoWithNoDuplicateKeys } = require('playwright/lib/utils/utils');2let obj1 = { a: 1, b: 2 };3let obj2 = { b: 3, c: 4 };4mergeIntoWithNoDuplicateKeys(obj1, obj2);5const { chromium } = require('playwright');6(async () => {7  const browser = await chromium.launch();8  const context = await browser.newContext();9  await context.close();10  await browser.close();11})();12const { chromium } = require('playwright');13(async () => {14  const browser = await chromium.launch({15    context: {16    }17  });18  await browser.close();19})();20const { chromium } = require('playwright');21(async () => {22  const browser = await chromium.launch({23    context: {24    },25  });26  await browser.close();27})();28const { chromium } = require('playwright');29(async () => {30  const browser = await chromium.launchPersistentContext('/tmp/my-profile', {31    context: {32    },33  });34  await browser.close();35})();36const { chromium } = require('playwright');37(async () => {38  const browser = await chromium.launchServer({39  });

Using AI Code Generation

1const { mergeIntoWithNoDuplicateKeys } = require('playwright/lib/utils/utils');2const obj1 = {3};4const obj2 = {5};6const obj3 = {7};8const obj4 = {9};10const obj5 = {11};12const obj6 = {13};14const obj7 = {15};16const obj8 = {17};18const obj9 = {19};20const obj10 = {21};22const obj11 = {23};24const obj12 = {25};26const obj13 = {27};28const obj14 = {29};30const obj15 = {31};32const obj16 = {

Using AI Code Generation

1const { mergeIntoWithNoDuplicateKeys } = require('@playwright/test/lib/utils/utils');2const { test } = require('@playwright/test');3test('test', async ({ page }) => {4  const obj1 = {5  };6  const obj2 = {7  };8  const obj3 = {9  };10  const mergedObject = mergeIntoWithNoDuplicateKeys({}, obj1, obj2, obj3);11  console.log(mergedObject);12});

Using AI Code Generation

1const { mergeIntoWithNoDuplicateKeys } = require('@playwright/test/lib/utils/utils');2const { test } = require('@playwright/test');3test('test', async ({ page }) => {4  const foo = { a: 1, b: 2 };5  const bar = { c: 3, d: 4 };6  const baz = { c: 5, d: 6 };7  mergeIntoWithNoDuplicateKeys(foo, bar, baz);8  console.log(foo);9});

Using AI Code Generation

1const { mergeIntoWithNoDuplicateKeys } = require('playwright/lib/utils/utils');2const mergeIntoWithNoDuplicateKeys = require('playwright/lib/utils/utils').mergeIntoWithNoDuplicateKeys;3const source = { a: 1, b: 2 };4const target = { a: 3, c: 4 };5mergeIntoWithNoDuplicateKeys(target, source);6const browser = await playwright.chromium.launch();7const context = await browser.newContext();8const page = await context.newPage();

Using AI Code Generation

1const { mergeIntoWithNoDuplicateKeys } = require('@playwright/test/lib/utils/utils');2const existingOptions = {3  viewport: {4  },5};6const newOptions = {7  viewport: {8  },9};10const mergedOptions = mergeIntoWithNoDuplicateKeys(existingOptions, newOptions);11console.log(mergedOptions);12const test = require('playwright-test').test;13const { mergeIntoWithNoDuplicateKeys } = require('./test.js');14test.use({15  contextOptions: {16    viewport: {17    },18  },19});20test('test', async ({ page }) => {21  const newOptions = {22    viewport: {23    },24  };25  await page.context().setOptions(newOptions);26});27const test = require('playwright-test').test;28const { mergeIntoWithNoDuplicateKeys } = require('./test.js');29test.use({30  contextOptions: {31    viewport: {32    },33  },34});35test('test', async ({ page }) => {36  const newOptions = {37    viewport: {38    },39  };40  const mergedOptions = mergeIntoWithNoDuplicateKeys(page.context().options(), newOptions);41  await page.context().setOptions(mergedOptions);42});

StackOverFlow community discussions

Questions

Discussion

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

Running Playwright in Azure Function

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

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

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August ’21 Updates: Live With iOS 14.5, Latest Browsers, New Certifications, & More!

Hey Folks! Welcome back to the latest edition of LambdaTest’s product updates. Since programmer’s day is just around the corner, our incredible team of developers came up with several new features and enhancements to add some zing to your workflow. We at LambdaTest are continuously upgrading the features on our platform to make lives easy for the QA community. We are releasing new functionality almost every week.

How To Use Playwright For Web Scraping with Python

In today’s data-driven world, the ability to access and analyze large amounts of data can give researchers, businesses & organizations a competitive edge. One of the most important & free sources of this data is the Internet, which can be accessed and mined through web scraping.

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.