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How to use printWarning method in Playwright Internal

Best JavaScript code snippet using playwright-internal

deprecated.test.js

...19        });20        afterEach(sinon.restore);21        describe("when `process.emitWarning` is defined", function() {22            it("should call process.emitWarning with a msg", function() {23                deprecated.printWarning(msg);24                assert.calledOnceWith(process.emitWarning, msg);25            });26        });27        describe("when `process.emitWarning` is undefined", function() {28            beforeEach(function() {29                sinon.replace(console, "info", sinon.fake());30                sinon.replace(console, "log", sinon.fake());31                process.emitWarning = undefined;32            });33            afterEach(sinon.restore);34            describe("when `console.info` is defined", function() {35                it("should call `console.info` with a message", function() {36                    deprecated.printWarning(msg);37                    assert.calledOnceWith(console.info, msg);38                });39            });40            describe("when `console.info` is undefined", function() {41                it("should call `console.log` with a message", function() {42                    console.info = undefined;43                    deprecated.printWarning(msg);44                    assert.calledOnceWith(console.log, msg);45                });46            });47        });48    });49    describe("wrap", function() {50        var method = sinon.fake();51        var wrapped;52        beforeEach(function() {53            wrapped = deprecated.wrap(method, msg);54        });55        it("should return a wrapper function", function() {56            assert.match(wrapped, sinon.match.func);57        });...

validator.js

Source: validator.js

1const log = require("#src/utils/log")2/**3 * 4 * @param {string} str - str to print5 * @param {boolean} falseAlarm - if falseAlarm, do nothing... 6 */7function _warn(str, falseAlarm) {8    if (!falseAlarm) {9        log.warn(str)10    }11}12function _error(str) {13    log.error(str)14    return false15}16/**17 *18 * @param {import('@pld-builder/core/types/data').Deliverable} del19 * @param {boolean} printWarning20 * @returns {boolean} is the deliverable valid?21 */22function validateDeliverable(del, printWarning = true) {23    if (!del) {24        return _error("The delivery is null")25    }26    if (!del.name) {27        return _error("A delivery must have a name")28    }29    if (!del.sections) {30        return _error(`${del.name} (delivery) must have sections`)31    }32    return true33} 34/**35 *36 * @param {import('@pld-builder/core/types/data').Section} sec37 * @param {boolean} printWarning38 * @returns {boolean} is the section valid?39 */40function validateSection(sec, printWarning = true) {41    if (!sec) {42        return _error("The section is null")43    }44    if (!sec.name) {45        return _error("A section must have a name")46    }47    if (!sec.stories) {48        return _error(`${del.name} (section) must have user stories`)49    }50    return true51}52/**53 * 54 * @param {import('@pld-builder/core/types/data').UserStory} us55 * @param {boolean} printWarning56 * @returns {boolean} is the user story valid?57 */58function validateUserStory(us, printWarning = true) {59    if (!us) {60        return _error("The user story is null")61    }62    if (!us.name) {63        return _error("A user story must have a name")64    }65    if (!us.estimatedTime || us.estimatedTime <= 0) {66        return _error(`${us.name} (user story) must have an estimated time superior than 0`)67    }68    if (!us.as) {69        _warn(`${us.name} (user story) should specify who is it for`, !printWarning)70    }71    if (!us.description) {72        _warn(`${us.name} (user story) should specify a description of itself`, !printWarning)73    }74    75    // if (us.description.length < 100) {76    //     _warn(`${us.name} (user story) should have a longer description. Expected > 100 but got ${us.description.length}`, !printWarning)77    // }78    return true;79}80module.exports = {81    validateUserStory,82    validateSection,83    validateDeliverable,84    // validatePldData,...

06. roadRadar.js

Source: 06. roadRadar.js

1function roadRadar(arr) {2   areasLimit = {3      motorway: 130,4      interstate: 90,5      city: 50,6      residential: 207   }8   let [speed, area] = arr;9   let speedDifference = Math.abs(areasLimit[area] - speed);10   let printWarning = "";11   if (speedDifference > 0 && speedDifference <= 20) {12      printWarning = "speeding";13   } else if (speedDifference > 20 && speedDifference <= 40) {14      printWarning = "excessive speeding";15   } else if (speedDifference > 40) {16      printWarning = "reckless driving";17   }18   return printWarning;19}20console.log(21   roadRadar([120, 'interstate'])...

Using AI Code Generation

1const { printWarning } = require('playwright/lib/utils/utils');2printWarning('This is a warning');3const { printWarning } = require('playwright/lib/utils/utils');4printWarning('This is a warning');5const { printWarning } = require('playwright/lib/utils/utils');6printWarning('This is a warning');7const { printWarning } = require('playwright/lib/utils/utils');8printWarning('This is a warning');9const { printWarning } = require('playwright/lib/utils/utils');10printWarning('This is a warning');11const { printWarning } = require('playwright/lib/utils/utils');12printWarning('This is a warning');13const { printWarning } = require('playwright/lib/utils/utils');14printWarning('This is a warning');15const { printWarning } = require('playwright/lib/utils/utils');16printWarning('This is a warning');17const { printWarning } = require('playwright/lib/utils/utils');18printWarning('This is a warning');19const { printWarning } = require('playwright/lib/utils/utils');20printWarning('This is a warning');21const { printWarning } = require('playwright/lib/utils/utils');22printWarning('This is a warning');23const { printWarning } = require('playwright/lib/utils/utils');24printWarning('This is a warning');25const { printWarning } = require('playwright/lib/utils/utils');26printWarning('This is a warning');27const { printWarning } = require('playwright/lib/utils/utils');28printWarning('This is a

Using AI Code Generation

1const { printWarning } = require('playwright/lib/utils/stackTrace');2printWarning('test');3const { printWarning } = require('playwright/lib/utils/stackTrace');4printWarning('test');5const { printWarning } = require('playwright/lib/utils/stackTrace');6printWarning('test');7const { printWarning } = require('playwright/lib/utils/stackTrace');8printWarning('test');9const { printWarning } = require('playwright/lib/utils/stackTrace');10printWarning('test');11const { printWarning } = require('playwright/lib/utils/stackTrace');12printWarning('test');13const { printWarning } = require('playwright/lib/utils/stackTrace');14printWarning('test');15const { printWarning } = require('playwright/lib/utils/stackTrace');16printWarning('test');17const { printWarning } = require('playwright/lib/utils/stackTrace');18printWarning('test');19const { printWarning } = require('playwright/lib/utils/stackTrace');20printWarning('test');21const { printWarning } = require('playwright/lib/utils/stackTrace');22printWarning('test');23const { printWarning } = require('playwright/lib/utils/stackTrace');24printWarning('test');25const { printWarning } = require('playwright/lib/utils/stackTrace');26printWarning('test');27const { printWarning } = require('playwright/lib/utils/stackTrace');28printWarning('test');29const { printWarning } = require('playwright/lib/utils/stackTrace');30printWarning('test');

Using AI Code Generation

1const { printWarning } = require('playwright/lib/utils/utils');2printWarning('This is a warning message');3const { printWarning } = require('playwright/lib/utils/utils');4printWarning('This is a warning message');5const { printWarning } = require('playwright/lib/utils/utils');6printWarning('This is a warning message');7const { printWarning } = require('playwright/lib/utils/utils');8printWarning('This is a warning message');9const { printWarning } = require('playwright/lib/utils/utils');10printWarning('This is a warning message');11const { printWarning } = require('playwright/lib/utils/utils');12printWarning('This is a warning message');13const { printWarning } = require('playwright/lib/utils/utils');14printWarning('This is a warning message');15const { printWarning } = require('playwright/lib/utils/utils');16printWarning('This is a warning message');17const { printWarning } = require('playwright/lib/utils/utils');18printWarning('This is a warning message');19const { printWarning } = require('playwright/lib/utils/utils');20printWarning('This is a warning message');21const { printWarning } = require('playwright/lib/utils/utils');22printWarning('This is a warning message');23const { printWarning } = require('playwright/lib/utils/utils');24printWarning('This is a warning message');

Using AI Code Generation

1const { printWarning } = require('playwright/lib/utils/stackTrace');2printWarning('Warning message');3const { printWarning } = require('playwright/lib/utils/stackTrace');4printWarning('Warning message');5const { printWarning } = require('playwright/lib/utils/stackTrace');6printWarning('Warning message');7const { printWarning } = require('playwright/lib/utils/stackTrace');8printWarning('Warning message');9const { printWarning } = require('playwright/lib/utils/stackTrace');10printWarning('Warning message');11const { printWarning } = require('playwright/lib/utils/stackTrace');12printWarning('Warning message');13const { printWarning } = require('playwright/lib/utils/stackTrace');14printWarning('Warning message');15const { printWarning } = require('playwright/lib/utils/stackTrace');16printWarning('Warning message');17const { printWarning } = require('playwright/lib/utils/stackTrace');18printWarning('Warning message');19const { printWarning } = require('playwright/lib/utils/stackTrace');20printWarning('Warning message');21const { printWarning } = require('playwright/lib/utils/stackTrace');22printWarning('Warning message');23const { printWarning } = require('playwright/lib/utils/stackTrace');24printWarning('Warning message');25const { printWarning } = require('playwright/lib/utils/stackTrace');26printWarning('Warning message');27const { printWarning } =

Using AI Code Generation

1const { printWarning } = require('@playwright/test/lib/utils/trace');2printWarning('This is a warning message');3console.log('This is a console message');4const { test } = require('@playwright/test');5test('test', async ({ page }) => {6});7const { test } = require('@playwright/test');8test('test', async ({ page }) => {9  expect(await page.title()).toMatchSnapshot();10});11const { test } = require('@playwright/test');12test('test', async ({ page }) => {13  await page.click('text=Docs');14  const elementHandle = await page.waitForSelector('text=Docs');15  await elementHandle.click();16});

Using AI Code Generation

1const { printWarning } = require('playwright/lib/utils/stackTrace');2printWarning('This is a test warning');3    at printWarning (/Users/username/Downloads/playwright-test/test.js:3:11)4    at Object.<anonymous> (/Users/username/Downloads/playwright-test/test.js:6:1)5    at Module._compile (internal/modules/cjs/loader.js:1063:30)6    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)7    at Module.load (internal/modules/cjs/loader.js:928:32)8    at Function.Module._load (internal/modules/cjs/loader.js:769:14)9    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:72:12)10    at printWarning (/Users/username/Downloads/playwright-test/test.js:3:11)11    at Object.<anonymous> (/Users/username/Downloads/playwright-test/test.js:6:1)12    at Module._compile (internal/modules/cjs/loader.js:1063:30)13    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)14    at Module.load (internal/modules/cjs/loader.js:928:32)15    at Function.Module._load (internal/modules/cjs/loader.js:769:14)16    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:72:12)17    at printWarning (/Users/username/Downloads/playwright-test/test.js:3:11)18    at Object.<anonymous> (/Users/username/Downloads/playwright-test/test.js:6:1)19    at Module._compile (internal/modules/cjs/loader.js:1063:30)20    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)21    at Module.load (

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

Running Playwright in Azure Function

firefox browser does not start in playwright

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

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

Assuming you are not running test with the --runinband flag, the simple answer is yes but it depends ????

There is a pretty comprehensive GitHub issue jest#6957 that explains certain cases of when tests are run concurrently or in parallel. But it seems to depend on a lot of edge cases where jest tries its best to determine the fastest way to run the tests given the circumstances.

To my knowledge there is no way to force jest to run in parallel.

Aside

Have you considered using playwright instead of puppeteer with jest? Playwright has their own internally built testing library called @playwright/test that is used in place of jest with a similar API. This library allows for explicitly defining test groups in a single file to run in parallel (i.e. test.describe.parallel) or serially (i.e. test.describe.serial). Or even to run all tests in parallel via a config option.

// parallel
test.describe.parallel('group', () => {
  test('runs in parallel 1', async ({ page }) => {});
  test('runs in parallel 2', async ({ page }) => {});
});

// serial
test.describe.serial('group', () => {
  test('runs first', async ({ page }) => {});
  test('runs second', async ({ page }) => {});
});

https://stackoverflow.com/questions/73497773/how-to-run-a-list-of-test-suites-in-a-single-file-concurrently-in-jest

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

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

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

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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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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.
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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.
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