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How to use renderEnum method in Playwright Internal

Best JavaScript code snippet using playwright-internal

progress_bar.js

1/**2 * A progress bar js class that represents a progress bar html element that can fill up to3 * any arbitrary percent of its length and also draw a collection of events on top of the 4 * progress to show actions throughout the period of time the progress bar represents.5 */6RenderEnum = {7    TIME: 0,8    PROGRESS: 1,9    PERCENT: 2,10    properties: {11        0: "TIME",12        1: "PROGRESS",13        2: "PERCENT"14    }15}16class ProgressBar {17    // Simply math value used in drawing circles18    TWO_PI = Math.PI * 2;19    // Color of the bar progression20    BAR_COLOR = 'red';21    // Color of the slider at the end of the progression 22    SLIDER_COLOR = 'black'23        // Color of the click event dots24    CLICK_COLOR = 'green';25    // Color of button down event dots26    BUTTON_DOWN_COLOR = 'blue';27    // Color of special events28    SPECIAL_EVENT_COLOR = 'yellow';29    // Color of back events30    BACK_COLOR = 'purple';31    // The threshold with which to compare the time distance of events to determine if they should be grouped32    GROUP_THRESHOLD_IN_MS = 500;33    /**34     * Constucts a progress bar with the given data.35     * 36     * @param {[]} log - an array of click entries and button down entries.37     * @param {number} startTime - the time that the recording of the mturk interaction started38     * @param {number} totalTime - the total time that the mturk interaction happened.39     */40    constructor(progressBar, log, startTime, totalTime) {41        progressBar.width = progressBar.clientWidth;42        progressBar.height = progressBar.clientHeight;43        this.progressBar = progressBar;44        this.events = this.condenseEvents(log);45        this.startTime = startTime;46        this.totalTime = totalTime;47        /**48         * @type {CanvasRenderingContext2D} this.ctx49         */50        this.ctx = this.progressBar.getContext('2d');51        this.pixelLength = this.progressBar.clientWidth;52        this.height = this.progressBar.clientHeight;53        this.middle = this.height / 2;54        this.render(0, RenderEnum.PERCENT);55    }56    condenseEvents(log) {57        let condensedEvents = [];58        log.forEach((elem) => {59            condensedEvents.push([60                [elem.action, elem.time]61            ]);62        });63        return condensedEvents;64    }65    /**66     * Every item's x coordinate is transformed into a percent of the length of the progress bar67     * which can be transformed into number of pixels using this method.68     * 69     * @param {number} percent - transforms from percent to length in pixels.70     */71    calculateProgress(percent) { return (this.pixelLength * (percent / 100)); }72    /**73     * Calculates the progress of the progress bar that this given time represents.74     * 75     * @param {number} progress - the amount of progress.76     */77    calculatePercentByProgress(progress) { return (100 * (progress / this.pixelLength)); }78    /**79     * Calculates the percent of the progress bar that this given time represents.80     * 81     * @param {number} time - the time that the event happened.82     */83    calculatePercentByTime(time) { return (100 * ((time - this.startTime) / this.totalTime)); }84    /**85     * Calulates the amount of pixels of the progress bar to fill up based on a time.86     * 87     * @param {number} time - the time to calculate progress to.88     */89    calculateProgressByTime(time) { return this.calculateProgress(this.calculatePercentByTime(time)); }90    /**91     * Converts percent of progress bar to number of pixels in progress bar.92     * 93     * @param {number} percent - the percent of the progress bar.94     */95    calculateProgressByPercent(percent) { return this.pixelLength * percent; }96    /**97     * Calculates the time that corresponds to a location on the x axis of the progress bar.98     * Can be used to show how much time a click on the bar is equivalent to.99     * 100     * @param {number} progress - the amount of pixels to the right of the start of the element.101     */102    calculateTimeByProgress(progress) { return (this.startTime + ((progress / this.pixelLength) * this.totalTime)); }103    /**104     * Calculates the radius of the circle based on number of events at once.105     * 106     * @param {number} amount - number of events.107     */108    calculateRadius(amount) { return Math.min(9, amount); }109    /**110     * Clears the progress bar of all drawings.111     */112    clearBar() { this.ctx.clearRect(0, 0, this.pixelLength, this.height); }113    /**114     * This method fills up the progress bar's progress to the specified percent.115     * @param {number} progress - the rightmost pixel to fill to.116     */117    fillUp(progress) {118        this.ctx.fillStyle = this.BAR_COLOR119        this.ctx.fillRect(0, 0, progress, this.height);120    }121    /**122     * Draws a circle with the given data.123     * @param {number} progress - the point of progress (x-coordinate) to draw the event.124     * @param {number} radius - the radius of the circle, based on the number of events it represents.125     */126    drawCircle(progress, radius) {127        this.ctx.beginPath();128        this.ctx.ellipse(129            progress,130            this.middle,131            radius,132            radius,133            0,134            0,135            this.TWO_PI);136        this.ctx.fill();137    }138    /**139     * Draws an event which consists of multiple click and button presses. The longer the length140     * of the event array the bigger the resulting circle is.141     * 142     * @param {[]object} event - an array of objects containing at least a time value.143     */144    drawEvent(event) {145        this.drawCircle(146            this.calculateProgressByTime(event[0][1]),147            this.calculateRadius(3)148        );149    }150    /**151     * Draw all of the events that the progress bar has.152     */153    drawEvents() {154        this.events.forEach(event => {155            switch (event[0][0]) {156                case ActionEnum.CLICK:157                    this.ctx.fillStyle = this.CLICK_COLOR;158                    this.drawEvent(event);159                    break;160                case ActionEnum.BUTTON_DOWN:161                    this.ctx.fillStyle = this.BUTTON_DOWN_COLOR;162                    this.drawEvent(event);163                    break;164                case ActionEnum.SPECIAL_EVENT:165                    this.ctx.fillStyle = this.SPECIAL_EVENT_COLOR;166                    this.drawEvent(event);167                case ActionEnum.BACK:168                    this.ctx.fillStyle = this.BACK_COLOR;169                    this.drawEvent(event);170            }171        });172    }173    /**174     * Draws a slider at the end of the progression bar.175     * 176     * @param {number} progress - the progression value that the progress bar is at.177     */178    drawSlider(progress) {179        this.ctx.fillStyle = this.SLIDER_COLOR180        if (progress === 0) {181            this.ctx.fillRect(progress, 0, 2, this.height);182        } else if (progress === this.pixelLength) {183            this.ctx.fillRect(progress - 2, 0, 2, this.height);184        } else {185            this.ctx.fillRect(progress - 1, 0, 2, this.height);186        }187    }188    /**189     * Renders the entire progress bar with all of its events and filled to the amount specified.190     * 191     * @param {number} value - either a percent or a time that will be used to determine how far192     *                          to fill up the progress bar.193     * 194     * @param {0 | 1 | 2} renderVal - the enum value that represents incoming data.195     */196    render(value, renderVal) {197        switch (renderVal) {198            case RenderEnum.TIME:199                value = this.calculateProgressByTime(value);200                break;201            case RenderEnum.PROGRESS:202                value = value;203                break;204            case RenderEnum.PERCENT:205                value = this.calculateProgressByPercent(value);206                break;207        }208        this.clearBar();209        this.fillUp(value);210        this.drawEvents();211        this.drawSlider(value);212    }...

Properties.js

Source: Properties.js

...36          return <Cell key={key} title={key} content={textfield}/>37      });38      return <Cells>{form}</Cells>39  }40  renderEnum(type, key, value){41    42    const typeprops = {43          options : enumForPropery(type, key).map(i=>{return {name:i, value:i}}),44          onSelect: (event)=>{45            this._updateStyle(key, event.target.value);46          },47          style: {width: '100%'},48          value: value,49    }50  51    return  <Select {...typeprops}/>                       52  53  }54  renderStyle(){55          56      const { template={}, updateStyle } = this.props;57      const {style={}} = template;58      const form = Object.keys(style).map((key,i)=>{59         60          if (typeForProperty(template.type, key) === "enum"){61            return <Cell key={key} title={key} content={this.renderEnum(template.type, key, style[key])}/>62          }63          else{64            const props = { 65              value: style[key],66              id:key,67              onBlur:(property, event)=>{68                this._updateStyle(property, event.target.value);69              }70            }71            const textfield =  <div className="centered"><Textfield {...props}/></div>72            return <Cell key={key} title={key} content={textfield}/>73          }74      });75      return <Cells>{form}</Cells>...

compile_telemetry_reference.js

Source: compile_telemetry_reference.js

...23  switch (type) {24    case 'object':25      return `Event properties:\n26${Object.entries(properties)27  .map(([property, { type, description, enum: _enum = [] }]) => `- \`${property}\` *(${type})*: ${description}${renderEnum(_enum)}`)28  .join('\n')29}30`;31    case 'null':32      return '';33    case undefined:34      return '';35    default:36      throw new Error(`Unexpected event type: "${type}".`);37  }38};39const renderTelemetryEventDescription = (event, schema) => {40  if (schema.description) {41    return schema.description;...

Props.js

Source: Props.js

...54		return (55			<div>56				{prop.description}57				{prop.description && isEnum && ' '}58				{isEnum && this.renderEnum(prop)}59				{isUnion && this.renderUnion(prop)}60			</div>61		);62	}63	renderEnum(prop) {64		if (!Array.isArray(prop.type.value)) {65			return <span>{prop.type.value}</span>;66		}67		let values = prop.type.value.map(({ value }) => (68			<li className={s.listItem} key={value}>69				<code>{this.unquote(value)}</code>70			</li>71		));72		return (73			<span>One of: <ul className={s.list}>{values}</ul></span>74		);75	}76	renderUnion(prop) {77		if (!Array.isArray(prop.type.value)) {...

glitch_controls.js

Source: glitch_controls.js

...18  channel: colorChange$,19  direction: directionChange$,20  amount: amountChange$21};22function renderEnum(config, subject$) {23  return h('div.uk-button-group', {}, [24      h('button.uk-button.q-button-label', {disabled: true}, config.name)25    ].concat(config.values.map((v, i) => {26    return h('button.uk-button',27      {28        'ev-click': function (ev) { subject$.onNext(ev); },29        'type': 'button',30        'value': v,31        'className': i == config.active ? 'uk-button-primary' : ''32      }, buttonSymbols[v])33  })));34}35// style input fields and tune event handling!!!!!!36function renderRange(config, subject$) {...

enumBrowser.js

Source: enumBrowser.js

...6import ProtoInfo from './protoInfo'7import DocBlock from './docBlock'8import OptionsPopover from './optionsPopover'9export default class EnumBrowser extends React.Component {10  renderEnum(theEnum) {11    let docs;12    // TODO(daicoden) replace test-done with template mechanism, tests will use it to inject this data, others can use it to styleize page13    return (14      <div>15        <h1>{theEnum.name}<OptionsPopover placement='right' obj={theEnum} /></h1>16        <DocBlock docs={theEnum.documentation} />17        <ProtoInfo infoObject={theEnum}/>18        {this.renderValues(theEnum)}19        <div id="test-done"></div>20      </div>21    );22  }23  renderValues(theEnum) {24    let valueRows = this.renderValueRows(theEnum.value, theEnum);25    return (26      <div className='panel panel-default'>27        <div className='panel-heading'>Values</div>28        <table className='table table-hover'>29          <thead>30            <tr>31              <th/> 32              <th>ID</th>33              <th>Name</th>34              <th/>35            </tr>36          </thead>37          <tbody>38            {valueRows}39          </tbody>40        </table>41      </div>42    )43  }44  renderValueRows(values, theEnum) {45    return map(values, (value) => {46      return (47        <tr key={`enum-value-row-${theEnum.fullName}-${value.number}`}>48          <td><OptionsPopover placement='left' obj={theEnum}/></td>49          <td>{value.number}</td>50          <td>{value.name}</td>51          <td>{value.documentation}</td>52        </tr>53      );54    });55  }56  render() {57    if (!state.byEnum) {58      return (<div className='alert alert-info'>Loading</div>);59    }60    let theEnum = state.byEnum[this.props.params.enum_name];61    if (!theEnum) {62      return (<div className='alert alert-danger'>Enum Not Found</div>);63    } else {64      return this.renderEnum(theEnum);65    }66  }...

jsonschema.array.component.js

Source: jsonschema.array.component.js

...38    render () {39      let { schema } = this.props40      const enumItems = schema.getIn(['enum'])41      if (enumItems) {42        return this.renderEnum()43      }44      return super.render()45    }46  }...

Using AI Code Generation

1const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager');2const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager');3const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager');4const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager');5const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager');6const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager');7const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager');8const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager');9const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager');10const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager');11const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager');12const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager');13const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager');14const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager');15const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager');16const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager');17const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager');18const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager');19const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager');20const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager');21const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager');22const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager');23const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager');24const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager');25const { renderEnum } =

Using AI Code Generation

1const { renderEnum } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');2const { renderEnum } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');3const { renderEnum } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');4const { renderEnum } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');5const { renderEnum } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');6const { renderEnum } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');7const { renderEnum } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');8const { renderEnum } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');9const { renderEnum } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');10const { renderEnum } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');11const { renderEnum } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');12const { renderEnum } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');13const { renderEnum } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');14const { renderEnum } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');

Using AI Code Generation

1const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager.js');2const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager.js');3const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager.js');4const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager.js');5const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager.js');6const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager.js');7const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager.js');8const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager.js');9const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager.js');10const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager.js');11const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager.js');12const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager.js');13const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager.js');14const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager.js');15const { renderEnum } = require('playwright/lib/server/chromium/crNetworkManager.js');16const {

Using AI Code Generation

1const { renderEnum } = require('./node_modules/playwright/lib/utils/utils');2const { chromium } = require('./node_modules/playwright');3(async () => {4    const browser = await chromium.launch();5    const context = await browser.newContext();6    const page = await context.newPage();7    const content = await page.content();8    console.log(renderEnum(content));9    await browser.close();10})();11{

Using AI Code Generation

1const { renderEnum } = require('playwright');2const { chromium } = require('playwright-chromium');3const { devices } = require('playwright-chromium');4const { webkit } = require('playwright-webkit');5const { firefox } = require('playwright-firefox');6(async () => {7  const browser = await chromium.launch();8  const page = await browser.newPage();9  await page.screenshot({ path: 'wikipedia-homepage.png' });10  await browser.close();11})();12const { renderEnum } = require('playwright');13const { chromium } = require('playwright-chromium');14const { devices } = require('playwright-chromium');15const { webkit } = require('playwright-webkit');16const { firefox } = require('playwright-firefox');17(async () => {18  const browser = await chromium.launch();19  const page = await browser.newPage();20  await page.screenshot({ path: 'wikipedia-homepage.png' });21  await browser.close();22})();23const { renderEnum } = require('playwright');24const { chromium } = require('playwright-chromium');25const { devices } = require('playwright-chromium');26const { webkit } = require('playwright-webkit');27const { firefox } = require('playwright-firefox');28(async () => {29  const browser = await chromium.launch();30  const page = await browser.newPage();31  await page.screenshot({ path: 'wikipedia-homepage.png' });32  await browser.close();33})();34const { renderEnum } = require('playwright');35const { chromium } = require('playwright-chromium');36const { devices } = require('playwright-chromium');37const { webkit } = require('playwright-webkit');38const { firefox } = require('playwright-firefox');39(async () => {40  const browser = await chromium.launch();41  const page = await browser.newPage();42  await page.screenshot({

Using AI Code Generation

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

Using AI Code Generation

1const { Page } = require('playwright/lib/page');2Page.prototype.renderEnum = async function (selector, option) {3  await this.selectOption(selector, option);4  await this.waitForSelector(`[data-value="${option}"]`);5  await this.click(`[data-value="${option}"]`);6};7const { Page } = require('playwright/lib/page');8Page.prototype.renderEnum = async function (selector, option) {9  await this.selectOption(selector, option);10  await this.waitForSelector(`[data-value="${option}"]`);11  await this.click(`[data-value="${option}"]`);12};13const { Page } = require('playwright/lib/page');14Page.prototype.renderEnum = async function (selector, option) {15  await this.selectOption(selector, option);16  await this.waitForSelector(`[data-value="${option}"]`);17  await this.click(`[data-value="${option}"]`);18};19const { Page } = require('playwright/lib/page');20Page.prototype.renderEnum = async function (selector, option) {21  await this.selectOption(selector, option);22  await this.waitForSelector(`[data-value="${option}"]`);23  await this.click(`[data-value="${option}"]`);24};25const { Page } = require('playwright/lib/page');26Page.prototype.renderEnum = async function (selector, option) {27  await this.selectOption(selector, option);28  await this.waitForSelector(`[data-value="${option}"]`);29  await this.click(`[data-value="${option}"]`);30};31const { Page } = require('playwright/lib/page');32Page.prototype.renderEnum = async function (selector, option) {33  await this.selectOption(selector, option);34  await this.waitForSelector(`[data-value="${option}"]`);35  await this.click(`[data-value="${option}"]`);36};37const { Page } = require('playwright/lib/page');38Page.prototype.renderEnum = async function (selector, option) {39  await this.selectOption(selector, option);40  await this.waitForSelector(`

StackOverFlow community discussions

Questions

Discussion

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

firefox browser does not start in playwright

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

Running Playwright in Azure Function

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

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

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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.
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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.
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Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.