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How to use updateFunctionComponent method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactDOM.js

...24  }else if (typeof type === 'function') {25    node = type.isReactComponent26    ? // node = type.prototype.isReactComponent27      updateClassComponent(vnode)28    : updateFunctionComponent(vnode);29  }else if (type){30    node = document.createElement(type);31  }else {32    node = document.createDocumentFragment();33  }34  updateNode(node, props);35  //å¤æä¸ä¸æ¯å¦è¿æåèç¹36  reconcilerChildren(props.children, node);37  return node;38}39function reconcilerChildren (children,node) {40  for (let i = 0; i < children.length; i++) {41    // console.log("children", children[i]); //sy-log42    let child = children[i];43    // éå åå»ºåç´ 44    // å¤è¯»children[i]ç±»å45    if (Array.isArray(child)) {46      for (let j = 0; j < child.length; j++) {47        render(child[j], node);48      }49    } else {50      render(children[i], node);51    }52  }53}54// æ´æ°èç¹ä¸å±æ§ï¼å¦classNameãnodeValueç55function updateNode(node, nextVal) {56  Object.keys(nextVal)57    .filter(k => k !== "children")58    .forEach(k => {59      60      if (k.slice(0, 2) === "on") {61        // ä»¥onå¼å¤´ï¼å°±è®¤ä¸ºæ¯ä¸ä¸ªäºä»¶ï¼æºç å¤çå¤æä¸äºï¼62        // æºç éé¢æä¸å¼ äºä»¶è¡¨å¯¹æ¯63        let eventName = k.slice(2).toLocaleLowerCase();64        console.log(nextVal[k])65        node.addEventListener(eventName, nextVal[k]);66      } else {67        node[k] = nextVal[k];68      }69      console.log(node)70    });71}72// functionç»ä»¶ï¼è¿ånode73function updateFunctionComponent(vnode) {74  console.log("vnode",vnode)75  const {type, props} = vnode;76  const vvnode = type(props);77  const node = createNode(vvnode);78  return node;79}80function updateClassComponent(vnode) {81  const {type, props} = vnode;82  const cmp = new type(props); //å®ä¾å83  const vvnode = cmp.render();84  const node = createNode(vvnode);85  return node;86}87export default{...

render.js

Source: render.js

...13  if (typeof type === 'function') {14    if (type.isReactClassComponent === true) {15      node = updateClassComponent(vnode, container)16    } else {17      node = updateFunctionComponent(vnode, container)18    }19  } else if (typeof type === 'string') {20    node = updateHostComponent(vnode, container)21  } else {22    node = document.createDocumentFragment()23  }24  reconcileChildren(children, node)25  return node26}2728function reconcileChildren(children, node) {29  children.forEach(child => {30    Array.isArray(child)31      ? child.forEach(c => render(c, node))32      : render(child, node)33  })34}3536function updateClassComponent(vnode, container) {37  const { type, props } = vnode38  const Type = type39  const component = new Type(props)40  const vvnode = component.render()41  const node = render(vvnode, container)42  component.container = container43  component.current = node44  return node45}46function updateFunctionComponent(vnode, container) {47  const { type, props } = vnode48  const vvnode = type(props)49  return render(vvnode, container)50}5152function updateHostComponent(vnode, container) {53  const { type, props } = vnode54  let node55  if (type === TEXT) {56    node = document.createTextNode(props.text)57  } else {58    node = document.createElement(type)59    updateAttributes(node, props)60  }
...

kreact-dom.js

Source: kreact-dom.js

...20            // classç»ä»¶21            node = updateClassComponent(vnode);22        }else{23            // å½æ°ç»ä»¶24            node = updateFunctionComponent(vnode);25        }26    }else {27        node = updateFragmentComponent(vnode);28    }29    return node;30}31function updateHostComponent(vnode) {32    const { type, props } = vnode;33    let node = document.createElement(type);34    updateNode(node,props);35    reconcileChidlren(node, props.children)36    return node37}38function updateClassComponent(vnode){39    const {type,props} = vnode;40    41    // class ç»ä»¶çrenderå½æ°42    let classVNode = new type(props).render();43    return createNode(classVNode);44}45function updateFunctionComponent(vnode){46    const {type,props} = vnode;47    let node = type(props);48    return createNode(node);49}50function updateFragmentComponent(vnode){51    const {type,props} = vnode;52    let node = document.createDocumentFragment();53    console.log(vnode)54    reconcileChidlren(node,props.children)55    return node ;56}57function updateNode(node,props) {58    Object.keys(props).filter(item=>item!=='children').forEach(prop=>{59        node[prop] = props[prop]...

ReactFiberWorkLoop.js

Source: ReactFiberWorkLoop.js

...16  const {type} = wip;17  if (isStr(type)) {18    updateHostComponent(wip);19  } else if (isFn(type)) {20    updateFunctionComponent(wip);21  }22  // 2. å¤çä¸ä¸ä¸ªä»»å¡23  // æ·±åº¦ä¼åéå çæçæäº24  if (wip.child) {25    wip = wip.child;26    return;27  }28  let next = wip;29  while (next) {30    if (next.sibling) {31      wip = next.sibling;32      return;33    }34    next = next.return;...

k-react-dom.js

Source: k-react-dom.js

...17    updateNode(node, props);18  } else if (isFn(type)) {19    node = type.prototype.isReactComponent20      ? updateClassComponent(vnode)21      : updateFunctionComponent(vnode);22  } else {23    node = document.createTextNode(vnode);24  }25  return node;26}27function updateClassComponent(vnode) {28  const { type, props } = vnode;29  const instance = new type(props);30  const child = instance.render();31  return createNode(child);32}33function updateFunctionComponent(vnode) {34  const { type, props } = vnode;35  const child = type(props);36  return createNode(child);37}38function updateNode(node, nextValue) {39  Object.keys(nextValue).forEach((k) => {40    if (k !== "children") {41      node[k] = nextValue[k];42    }43  });44}45function reconcileChildren(parentNode, children) {46  let newChildren = Array.isArray(children) ? children : [children];47  for (let i = 0; i < newChildren.length; i++) {...

react-dom.js

Source: react-dom.js

...10    } else if (typeof type === 'string') {11        node = document.createElement(type, props)12    } else if (typeof type === 'function') {13        node = type.isReactComponent14            ? updateFunctionComponent(type, props)15            : updateClassComponents(type, props)16    }17    const childrens = props.children18    if (childrens.length > 0) {19        childrens.forEach(child => {20            render(child, node)21        })22    }23    updateNode(node, props)24    return node;25}26function updateFunctionComponent(type, props) {27    return createNode(type(props))28}29function updateClassComponents(type, props) {30    return createNode(new type(props).render())31}32function updateNode(node, nextVal) {33    let eventName34    Object.keys(nextVal).forEach(key => {35        if (key === 'children') return36        if ((eventName = key.slice(0, 2)) === "on") {37            node.addEventListener(eventName, nextVal[key]);38        } else  {39            node[key] = nextVal[key];40        }...

fiber.js

Source: fiber.js

1import { reconcileChildren } from "./reconcile";2import { createDom } from "./dom";3const w = window;4function updateFunctionComponent(fiber) {5  w.wipFiber = fiber;6  w.hookIndex = 0;7  w.wipFiber.hooks = [];8  const children = [fiber.type(fiber.props)];9  reconcileChildren(fiber, children);10}11function updateHostComponent(fiber) {12  if (!fiber.dom) {13    fiber.dom = createDom(fiber);14  }15  reconcileChildren(fiber, fiber.props.children);16}17/*18 * fiber:19 * Parent -> First child20 * Any child -> Parent21 * First child -> second child -> third child22 */23function performUnitOfWork(fiber) {24  const isFunctionComponent = fiber.type instanceof Function;25  if (isFunctionComponent) {26    updateFunctionComponent(fiber);27  } else {28    updateHostComponent(fiber);29  }30  // order of finding next unit of work31  // child -> child's sibling -> .. -> child's sibling -> parent32  if (fiber.child) {33    return fiber.child;34  }35  let nextFiber = fiber;36  while (nextFiber) {37    if (nextFiber.sibling) {38      return nextFiber.sibling;39    }40    nextFiber = nextFiber.parent;...

react08.js

Source: react08.js

1function reconcileChildren(work,children){2}3updateFunctionComponent();4updateClassComponent();5// å½æ°ç»ä»¶6function updateFunctionComponent(workInProgress){7  const {type,props} = workInProgress;8  const children = type(props);9  reconcileChildren(workInProgress,children);10}11// å½æ°ç»ä»¶12function updateClassComponent(workInProgress){13  const {type,props} = workInProgress;14  const instance = new type(props);15  const children = instance.render();16  17  reconcileChildren(workInProgress,children);...

Using AI Code Generation

1const { updateFunctionComponent } = require('playwright/lib/server/supplements/recorder/recorderSupplement');2const { updateFunctionComponent } = require('playwright/lib/server/supplements/recorder/recorderSupplement');3const { updateFunctionComponent } = require('playwright/lib/server/supplements/recorder/recorderSupplement');4const { updateFunctionComponent } = require('playwright/lib/server/supplements/recorder/recorderSupplement');5const { updateFunctionComponent } = require('playwright/lib/server/supplements/recorder/recorderSupplement');6const { updateFunctionComponent } = require('playwright/lib/server/supplements/recorder/recorderSupplement');7const { updateFunctionComponent } = require('playwright/lib/server/supplements/recorder/recorderSupplement');8const { updateFunctionComponent } = require('playwright/lib/server/supplements/recorder/recorderSupplement');9const { updateFunctionComponent } = require('playwright/lib/server/supplements/recorder/recorderSupplement');10const { updateFunctionComponent } = require('playwright/lib/server/supplements/recorder/recorderSupplement');11const { updateFunctionComponent } = require('playwright/lib/server/supplements/recorder/recorderSupplement');12const { updateFunctionComponent } = require('playwright/lib/server/supplements/recorder/recorderSupplement');13const { updateFunctionComponent } = require('playwright/lib/server/supplements/recorder/recorderSupplement');14const { updateFunctionComponent } = require('playwright/lib/server/supplements/recorder/recorderSupplement');15const { updateFunctionComponent } = require('playwright/lib/server/supplements/recorder/recorderSupplement');16const { updateFunctionComponent } = require('playwright/lib/server/supplements/recorder/recorderSupplement');17const { updateFunctionComponent } = require('playwright/lib/server/supplements/recorder/recorderSupplement');18const { updateFunctionComponent } = require('playwright/lib/server/supplements/recorder/recorderSupplement');19const { updateFunctionComponent } = require('playwright/lib/server/supplements/recorder/recorderSupplement');20const { updateFunctionComponent } = require('playwright/lib/server/supplements/recorder

Using AI Code Generation

1const { Page } = require('playwright');2const { updateFunctionComponent } = require('playwright/lib/server/supplements/recorder/recorderSupplement');3const { findSourceLocation, updateSourceLocation } = require('playwright/lib/server/supplements/recorder/sourceLocation');4const { getFunctionBody } = require('playwright/lib/server/supplements/recorder/utils');5const page = new Page();6const fn = async () => {7  await page.click('text=Click me');8};9const source = getFunctionBody(fn);10const { name, location } = findSourceLocation(source);11const newSource = updateSourceLocation(source, name, location, updateFunctionComponent);12console.log(newSource);13const { Page } = require('playwright');14const { updateFunctionComponent } = require('playwright/lib/server/supplements/recorder/recorderSupplement');15const { findSourceLocation, updateSourceLocation } = require('playwright/lib/server/supplements/recorder/sourceLocation');16const { getFunctionBody } = require('playwright/lib/server/supplements/recorder/utils');17const page = new Page();18const fn = async () => {19  await page.click('text=Click me');20};21const source = getFunctionBody(fn);22const { name, location } = findSourceLocation(source);23const newSource = updateSourceLocation(source, name, location, updateFunctionComponent);24console.log(newSource);25const { Page } = require('playwright');26const { updateFunctionComponent } = require('playwright/lib/server/supplements/recorder/recorderSupplement');27const { findSourceLocation, updateSourceLocation } = require('playwright/lib/server/supplements/recorder/sourceLocation');28const { getFunctionBody } = require('playwright/lib/server/supplements/recorder/utils');29const page = new Page();30const fn = async () => {31  await page.click('text=Click me');32};33const source = getFunctionBody(fn);34const { name, location } = findSourceLocation(source);35const newSource = updateSourceLocation(source, name, location, updateFunctionComponent);36console.log(newSource);

Using AI Code Generation

1const { updateFunctionComponent } = require('playwright/lib/server/dom');2updateFunctionComponent('test', (arg1, arg2) => {3    console.log(arg1, arg2);4});5const { test } = require('./test');6await test('arg1', 'arg2');7const { updateFunctionComponent } = require('playwright/lib/server/dom');8updateFunctionComponent('test', (arg1, arg2) => {9    console.log(arg1, arg2);10});11const { test } = require('./test');12await test('arg1', 'arg2');13const { updateFunctionComponent } = require('playwright/lib/server/dom');14updateFunctionComponent('test', (arg1, arg2) => {15    console.log(arg1, arg2);16});

Using AI Code Generation

1const { updateFunctionComponent } = require('playwright/lib/protocol/protocol-types');2updateFunctionComponent({ name: 'test', source: '() => {}' });3const { updateFunctionComponent } = require('playwright');4updateFunctionComponent({ name: 'test', source: '() => {}' });5### `updateFunctionComponent(params)`6const { updateFunctionComponent } = require('playwright');7updateFunctionComponent({ name: 'test', source: '() => {}' });

Using AI Code Generation

1const { updateFunctionComponent } = require('@playwright/test/lib/test');2updateFunctionComponent('my-component', (component) => {3  component.addLocator('my-locator', (name, parent) => {4    return parent.querySelector(`[data-test="${name}"]`);5  });6});7const { test } = require('@playwright/test');8test('my test', async ({ page }) => {9  await page.locator('my-component/my-locator=my-test');10});

Using AI Code Generation

1const { updateFunctionComponent } = require('playwright/lib/server/domSnapshot');2const { parseFunction } = require('playwright/lib/server/inspector/inspector');3const { domSnapshot } = require('./domSnapshot');4const { domSnapshot: domSnapshot2 } = require('./domSnapshot2');5const { domSnapshot: domSnapshot3 } = require('./domSnapshot3');6const { domSnapshot: domSnapshot4 } = require('./domSnapshot4');7const { domSnapshot: domSnapshot5 } = require('./domSnapshot5');8const { updateFunctionComponent } = require('playwright/lib/server/domSnapshot');9const { parseFunction } = require('playwright/lib/server/inspector/inspector');10const { domSnapshot } = require('./domSnapshot');11const { domSnapshot: domSnapshot2 } = require('./domSnapshot2');12const { domSnapshot: domSnapshot3 } = require('./domSnapshot3');13const { domSnapshot: domSnapshot4 } = require('./domSnapshot4');14const { domSnapshot: domSnapshot5 } = require('./domSnapshot5');15const { domSnapshot: domSnapshot6 } = require('./domSnapshot6');16const { domSnapshot: domSnapshot7 } = require('./domSnapshot7');17const { domSnapshot: domSnapshot8 } = require('./domSnapshot8');18const { domSnapshot: domSnapshot9 } = require('./domSnapshot9');19const { domSnapshot: domSnapshot10 } = require('./domSnapshot10');20const { domSnapshot: domSnapshot11 } = require('./domSnapshot11');21const { domSnapshot: domSnapshot12 } = require('./domSnapshot12');22const { domSnapshot: domSnapshot13 } = require('./domSnapshot13');23const { domSnapshot: domSnapshot14 } = require('./domSnapshot14');24const { domSnapshot: domSnapshot15 } = require('./domSnapshot15');25const { domSnapshot: domSnapshot16 } = require('./domSnapshot16');26const { domSnapshot: domSnapshot17 } = require('./domSnapshot17');27const { domSnapshot: domSnapshot18 } = require('./domSnapshot18');28const { domSnapshot: domSnapshot19 } = require('./domSnapshot19');29const { domSnapshot: domSnapshot20 } = require('./domSnapshot20');30const { domSnapshot: domSnapshot21 } = require('./domSnapshot21');31const { domSnapshot: domSnapshot

Using AI Code Generation

1const { updateFunctionComponent } = require('playwright');2updateFunctionComponent('MyComponent', (props) => ({3}));4const { updateFunctionComponent } = require('playwright');5updateFunctionComponent('MyComponent', (props) => ({6}));7const { updateFunctionComponent } = require('playwright');8updateFunctionComponent('MyComponent', (props) => ({9}));10const { updateFunctionComponent } = require('playwright');11updateFunctionComponent('MyComponent', (props) => ({12}));13const { updateFunctionComponent } = require('playwright');14updateFunctionComponent('MyComponent', (props) => ({15}));16const { updateFunctionComponent } = require('playwright');17updateFunctionComponent('MyComponent', (props) => ({18}));19const { updateFunctionComponent } = require('playwright');20updateFunctionComponent('MyComponent', (props) => ({21}));22const { updateFunctionComponent } = require('playwright');23updateFunctionComponent('MyComponent', (props) => ({24}));25const { updateFunctionComponent } = require('playwright');26updateFunctionComponent('

Using AI Code Generation

1const { updateFunctionComponent } = require('playwright/lib/server/inspector/inspector.js');2const text = 'Hello World';3const component = (props) => {4  return <div>{props.text}</div>5}6updateFunctionComponent(component, { text });7const { updateFunctionComponent } = require('playwright');8const text = 'Hello World';9const component = (props) => {10  return <div>{props.text}</div>11}12updateFunctionComponent(component, { text });13const { updateFunctionComponent } = require('playwright');14const text = 'Hello World';15const component = (props) => {16  return <div>{props.text}</div>17}18updateFunctionComponent(component, { text });19const { updateFunctionComponent } = require('playwright');20const text = 'Hello World';21const component = (props) => {22  return <div>{props.text}</div>23}24updateFunctionComponent(component, { text });25const { updateFunctionComponent } = require('playwright');26const text = 'Hello World';27const component = (props) => {28  return <div>{props.text}</div>29}30updateFunctionComponent(component, { text });31const { updateFunctionComponent } = require('playwright');32const text = 'Hello World';33const component = (props) => {34  return <div>{props.text}</div>35}36updateFunctionComponent(component, { text });

StackOverFlow community discussions

Questions

Discussion

Running Playwright in Azure Function

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

firefox browser does not start in playwright

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

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

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

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

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

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

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

Blogs

Check out the latest blogs from LambdaTest on this topic:

Testing Modern Applications With Playwright ????

Web applications continue to evolve at an unbelievable pace, and the architecture surrounding web apps get more complicated all of the time. With the growth in complexity of the web application and the development process, web application testing also needs to keep pace with the ever-changing demands.

Why Agile Teams Have to Understand How to Analyze and Make adjustments

How do we acquire knowledge? This is one of the seemingly basic but critical questions you and your team members must ask and consider. We are experts; therefore, we understand why we study and what we should learn. However, many of us do not give enough thought to how we learn.

Why Agile Is Great for Your Business

Agile project management is a great alternative to traditional methods, to address the customer’s needs and the delivery of business value from the beginning of the project. This blog describes the main benefits of Agile for both the customer and the business.

Now Log Bugs Using LambdaTest and DevRev

In today’s world, an organization’s most valuable resource is its customers. However, acquiring new customers in an increasingly competitive marketplace can be challenging while maintaining a strong bond with existing clients. Implementing a customer relationship management (CRM) system will allow your organization to keep track of important customer information. This will enable you to market your services and products to these customers better.

Starting & growing a QA Testing career

The QA testing career includes following an often long, winding road filled with fun, chaos, challenges, and complexity. Financially, the spectrum is broad and influenced by location, company type, company size, and the QA tester’s experience level. QA testing is a profitable, enjoyable, and thriving career choice.

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.