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How to use toContainText method in Playwright Internal

Best JavaScript code snippet using playwright-internal

dataset_spec.js

...40  describe('#update', function() {41    it('should render suggestions', function() {42      this.source.andCallFake(syncMockSuggestions);43      this.dataset.update('woah');44      expect(this.dataset.$el).toContainText('one');45      expect(this.dataset.$el).toContainText('two');46      expect(this.dataset.$el).toContainText('html');47    });48    it('should escape html chars from display value when using default template', function() {49      this.source.andCallFake(syncMockSuggestions);50      this.dataset.update('woah');51      expect(this.dataset.$el).toContainText('<b>html</b>');52    });53    it('should respect limit option', function() {54      this.dataset.limit = 2;55      this.source.andCallFake(syncMockSuggestions);56      this.dataset.update('woah');57      expect(this.dataset.$el).toContainText('one');58      expect(this.dataset.$el).toContainText('two');59      expect(this.dataset.$el).not.toContainText('three');60    });61    it('should allow custom display functions', function() {62      this.dataset = new Dataset({63        name: 'test',64        node: $('<div>'),65        display: function(o) { return o.display; },66        source: this.source = jasmine.createSpy('source')67      }, www);68      this.source.andCallFake(syncMockSuggestionsDisplayFn);69      this.dataset.update('woah');70      expect(this.dataset.$el).toContainText('4');71      expect(this.dataset.$el).toContainText('5');72      expect(this.dataset.$el).toContainText('6');73    });74    it('should ignore async invocations of sync', function() {75      this.source.andCallFake(asyncSync);76      this.dataset.update('woah');77      expect(this.dataset.$el).not.toContainText('one');78    });79    it('should ignore subesequent invocations of sync', function() {80      this.source.andCallFake(multipleSync);81      this.dataset.update('woah');82      expect(this.dataset.$el.find('.tt-suggestion')).toHaveLength(3);83    });84    it('should trigger asyncRequested when needing/expecting backfill', function() {85      var spy = jasmine.createSpy();86      this.dataset.async = true;87      this.dataset.onSync('asyncRequested', spy);88      this.source.andCallFake(fakeGetWithAsyncSuggestions);89      this.dataset.update('woah');90      expect(spy).toHaveBeenCalled();91    });92    it('should not trigger asyncRequested when not expecting backfill', function() {93      var spy = jasmine.createSpy();94      this.dataset.async = false;95      this.dataset.onSync('asyncRequested', spy);96      this.source.andCallFake(fakeGetWithAsyncSuggestions);97      this.dataset.update('woah');98      expect(spy).not.toHaveBeenCalled();99    });100    it('should not trigger asyncRequested when not expecting backfill', function() {101      var spy = jasmine.createSpy();102      this.dataset.limit = 2;103      this.dataset.async = true;104      this.dataset.onSync('asyncRequested', spy);105      this.source.andCallFake(fakeGetWithAsyncSuggestions);106      this.dataset.update('woah');107      expect(spy).not.toHaveBeenCalled();108    });109    it('should trigger asyncCanceled when pending aysnc is canceled', function() {110      var spy = jasmine.createSpy();111      this.dataset.async = true;112      this.dataset.onSync('asyncCanceled', spy);113      this.source.andCallFake(fakeGetWithAsyncSuggestions);114      this.dataset.update('woah');115      this.dataset.cancel();116      waits(100);117      runs(function() {118        expect(spy).toHaveBeenCalled();119      });120    });121    it('should not trigger asyncCanceled when cancel happens after update', function() {122      var spy = jasmine.createSpy();123      this.dataset.async = true;124      this.dataset.onSync('asyncCanceled', spy);125      this.source.andCallFake(fakeGetWithAsyncSuggestions);126      this.dataset.update('woah');127      waits(100);128      runs(function() {129        this.dataset.cancel();130        expect(spy).not.toHaveBeenCalled();131      });132    });133    it('should trigger asyncReceived when aysnc is received', function() {134      var spy = jasmine.createSpy();135      this.dataset.async = true;136      this.dataset.onSync('asyncReceived', spy);137      this.source.andCallFake(fakeGetWithAsyncSuggestions);138      this.dataset.update('woah');139      waits(100);140      runs(function() {141        expect(spy).toHaveBeenCalled();142      });143    });144    it('should not trigger asyncReceived if canceled', function() {145      var spy = jasmine.createSpy();146      this.dataset.async = true;147      this.dataset.onSync('asyncReceived', spy);148      this.source.andCallFake(fakeGetWithAsyncSuggestions);149      this.dataset.update('woah');150      this.dataset.cancel();151      waits(100);152      runs(function() {153        expect(spy).not.toHaveBeenCalled();154      });155    });156    it('should not modify sync when async is added', function() {157      var $test;158      this.dataset.async = true;159      this.source.andCallFake(fakeGetWithAsyncSuggestions);160      this.dataset.update('woah');161      $test = this.dataset.$el.find('.tt-suggestion').first();162      $test.addClass('test');163      waits(100);164      runs(function() {165        expect($test).toHaveClass('test');166      });167    });168    it('should respect limit option in regard to async', function() {169      this.dataset.async = true;170      this.source.andCallFake(fakeGetWithAsyncSuggestions);171      this.dataset.update('woah');172      waits(100);173      runs(function() {174        expect(this.dataset.$el.find('.tt-suggestion')).toHaveLength(5);175      });176    });177    it('should cancel pending async', function() {178      var spy1 = jasmine.createSpy(), spy2 = jasmine.createSpy();179      this.dataset.async = true;180      this.dataset.onSync('asyncCanceled', spy1);181      this.dataset.onSync('asyncReceived', spy2);182      this.source.andCallFake(fakeGetWithAsyncSuggestions);183      this.dataset.update('woah');184      this.dataset.update('woah again');185      waits(100);186      runs(function() {187        expect(spy1.callCount).toBe(1);188        expect(spy2.callCount).toBe(1);189      });190    });191    it('should render notFound when no suggestions are available', function() {192      this.dataset = new Dataset({193        source: this.source,194        node: $('<div>'),195        templates: {196          notFound: '<h2>empty</h2>'197        }198      }, www);199      this.source.andCallFake(syncEmptySuggestions);200      this.dataset.update('woah');201      expect(this.dataset.$el).toContainText('empty');202    });203    it('should render pending when no suggestions are available but async is pending', function() {204      this.dataset = new Dataset({205        source: this.source,206        node: $('<div>'),207        async: true,208        templates: {209          pending: '<h2>pending</h2>'210        }211      }, www);212      this.source.andCallFake(syncEmptySuggestions);213      this.dataset.update('woah');214      expect(this.dataset.$el).toContainText('pending');215    });216    it('should render header when suggestions are rendered', function() {217      this.dataset = new Dataset({218        source: this.source,219        node: $('<div>'),220        templates: {221          header: '<h2>header</h2>'222        }223      }, www);224      this.source.andCallFake(syncMockSuggestions);225      this.dataset.update('woah');226      expect(this.dataset.$el).toContainText('header');227    });228    it('should render footer when suggestions are rendered', function() {229      this.dataset = new Dataset({230        source: this.source,231        node: $('<div>'),232        templates: {233          footer: function(c) { return '<p>' + c.query + '</p>'; }234        }235      }, www);236      this.source.andCallFake(syncMockSuggestions);237      this.dataset.update('woah');238      expect(this.dataset.$el).toContainText('woah');239    });240    it('should not render header/footer if there is no content', function() {241      this.dataset = new Dataset({242        source: this.source,243        node: $('<div>'),244        templates: {245          header: '<h2>header</h2>',246          footer: '<h2>footer</h2>'247        }248      }, www);249      this.source.andCallFake(syncEmptySuggestions);250      this.dataset.update('woah');251      expect(this.dataset.$el).not.toContainText('header');252      expect(this.dataset.$el).not.toContainText('footer');253    });254    it('should not render stale suggestions', function() {255      this.source.andCallFake(fakeGetWithAsyncSuggestions);256      this.dataset.update('woah');257      this.source.andCallFake(syncMockSuggestions);258      this.dataset.update('nelly');259      waits(100);260      runs(function() {261        expect(this.dataset.$el).toContainText('one');262        expect(this.dataset.$el).toContainText('two');263        expect(this.dataset.$el).toContainText('html');264        expect(this.dataset.$el).not.toContainText('four');265        expect(this.dataset.$el).not.toContainText('five');266      });267    });268    it('should not render async suggestions if update was canceled', function() {269      this.source.andCallFake(fakeGetWithAsyncSuggestions);270      this.dataset.update('woah');271      this.dataset.cancel();272      waits(100);273      runs(function() {274        var rendered = this.dataset.$el.find('.tt-suggestion');275        expect(rendered).toHaveLength(3);276      });277    });278    it('should trigger rendered after suggestions are rendered', function() {279      var spy;...

dataset_view_spec.js

Source: dataset_view_spec.js

...23  describe('#update', function() {24    it('should render suggestions', function() {25      this.source.andCallFake(fakeGetWithSyncResults);26      this.dataset.update('woah');27      expect(this.dataset.getRoot()).toContainText('one');28      expect(this.dataset.getRoot()).toContainText('two');29      expect(this.dataset.getRoot()).toContainText('three');30    });31    it('should allow custom display functions', function() {32      this.dataset = new Dataset({33        name: 'test',34        display: function(o) { return o.display; },35        source: this.source = jasmine.createSpy('source')36      });37      this.source.andCallFake(fakeGetForDisplayFn);38      this.dataset.update('woah');39      expect(this.dataset.getRoot()).toContainText('4');40      expect(this.dataset.getRoot()).toContainText('5');41      expect(this.dataset.getRoot()).toContainText('6');42    });43    it('should render empty when no suggestions are available', function() {44      this.dataset = new Dataset({45        source: this.source,46        templates: {47          empty: '<h2>empty</h2>'48        }49      });50      this.source.andCallFake(fakeGetWithSyncEmptyResults);51      this.dataset.update('woah');52      expect(this.dataset.getRoot()).toContainText('empty');53    });54    it('should render header', function() {55      this.dataset = new Dataset({56        source: this.source,57        templates: {58          header: '<h2>header</h2>'59        }60      });61      this.source.andCallFake(fakeGetWithSyncResults);62      this.dataset.update('woah');63      expect(this.dataset.getRoot()).toContainText('header');64    });65    it('should render footer', function() {66      this.dataset = new Dataset({67        source: this.source,68        templates: {69          footer: function(c) { return '<p>' + c.query + '</p>'; }70        }71      });72      this.source.andCallFake(fakeGetWithSyncResults);73      this.dataset.update('woah');74      expect(this.dataset.getRoot()).toContainText('woah');75    });76    it('should not render header/footer if there is no content', function() {77      this.dataset = new Dataset({78        source: this.source,79        templates: {80          header: '<h2>header</h2>',81          footer: '<h2>footer</h2>'82        }83      });84      this.source.andCallFake(fakeGetWithSyncEmptyResults);85      this.dataset.update('woah');86      expect(this.dataset.getRoot()).not.toContainText('header');87      expect(this.dataset.getRoot()).not.toContainText('footer');88    });89    it('should not render stale suggestions', function() {90      this.source.andCallFake(fakeGetWithAsyncResults);91      this.dataset.update('woah');92      this.source.andCallFake(fakeGetWithSyncResults);93      this.dataset.update('nelly');94      waits(100);95      runs(function() {96        expect(this.dataset.getRoot()).toContainText('one');97        expect(this.dataset.getRoot()).toContainText('two');98        expect(this.dataset.getRoot()).toContainText('three');99        expect(this.dataset.getRoot()).not.toContainText('four');100        expect(this.dataset.getRoot()).not.toContainText('five');101      });102    });103    it('should not render suggestions if update was canceled', function() {104      this.source.andCallFake(fakeGetWithAsyncResults);105      this.dataset.update('woah');106      this.dataset.cancel();107      waits(100);108      runs(function() { expect(this.dataset.getRoot()).toBeEmpty(); });109    });110    it('should trigger rendered after suggestions are rendered', function() {111      var spy;112      this.dataset.onSync('rendered', spy = jasmine.createSpy());113      this.source.andCallFake(fakeGetWithSyncResults);114      this.dataset.update('woah');...

QuickStartWidgetSpec.js

Source: QuickStartWidgetSpec.js

...44      $('#jasmine_content').append("<div id='maven_widget'></div> ");45      Spring.buildQuickStartWidget("#quick_select_widget", "#maven_widget", project);46    });47    it("lists out each release's version", function () {48      expect($('#quick_select_widget')).toContainText("1.4.0.RC1");49      expect($('#quick_select_widget')).toContainText("1.3.4");50    });51    describe("maven view", function() {52      it("shows the current release dependency by default", function() {53        expect($('#maven_widget')).toContainText("org.springframework.data");54        expect($('#maven_widget')).toContainText("spring-data-jpa");55        expect($('#maven_widget')).toContainText("1.3.4.RELEASE");56      });57      it("shows the correct dependency when users select a different release", function() {58        $('#jasmine_content select').val(0).change();59        expect($('#maven_widget')).toContainText("org.springframework.data");60        expect($('#maven_widget')).toContainText("spring-data-jpa");61        expect($('#maven_widget')).toContainText("1.4.0.RC1");62      });63      it("shows the repository information if user selects a release with a repository", function() {64          $('#jasmine_content select').val(0).change();65          expect($('#maven_widget')).toContainText("spring-milestones");66          expect($('#maven_widget')).toContainText("Spring Milestones");67          expect($('#maven_widget')).toContainText("http://repo.spring.io/milestone");68          expect($('#maven_widget')).toContainText("false");69      });70      it("doesn't show the repository if the user selects a release without a repository", function (){71          $('#jasmine_content select').val(1).change();72          expect($('#maven_widget')).not.toContainText("repository");73          expect($('#maven_widget')).not.toContainText("spring-milestones");74          expect($('#maven_widget')).not.toContainText("Spring Milestones");75          expect($('#maven_widget')).not.toContainText("http://repo.spring.io/milestone");76          expect($('#maven_widget')).not.toContainText("false");77      });78    });79    describe("gradle view", function() {80      beforeEach(function() {81        $("#quick_select_widget [data-snippet-type=gradle]").click();82      });83      it("shows the current release dependency by default", function() {84        expect($('#maven_widget')).toContainText("dependencies");85        expect($('#maven_widget')).toContainText("org.springframework.data:spring-data-jpa:1.3.4.RELEASE");86      });87      it("shows the repository if the data has one", function() {88        $('#jasmine_content select').val(0).change();89        expect($('#maven_widget')).toContainText("repositories");90        expect($('#maven_widget')).toContainText("http://repo.spring.io/milestone");91      });92    });93  });...

Using AI Code Generation

1const { test, expect } = require('@playwright/test');2test('test', async ({ page }) => {3  await expect(page).toContainText('Playwright');4});5const { test, expect } = require('@playwright/test');6test('test', async ({ page }) => {7  await expect(page).toContainText('Playwright');8});9const { test, expect } = require('@playwright/test');10test('test', async ({ page }) => {11  await expect(page).toContainText('Playwright');12});13const { test, expect } = require('@playwright/test');14test('test', async ({ page }) => {15  await expect(page).toContainText('Playwright');16});17const { test, expect } = require('@playwright/test');18test('test', async ({ page }) => {19  await expect(page).toContainText('Playwright');20});21const { test, expect } = require('@playwright/test');22test('test', async ({ page }) => {23  await expect(page).toContainText('Playwright');24});25const { test, expect } = require('@playwright/test');26test('test', async ({ page }) => {27  await expect(page).toContainText('Playwright');28});29const { test, expect } = require('@playwright/test');30test('test', async ({ page }) => {31  await expect(page).toContainText('Playwright');32});33const { test, expect } = require('@playwright/test');34test('test',

Using AI Code Generation

1const { test, expect } = require('@playwright/test');2test('use toContainText', async ({ page }) => {3  expect(await page.innerText('.navbar__inner')).toContainText('Docs');4});5const { toContainText } = require('expect-playwright');6expect.extend({ toContainText });7I am trying to use the toContainText method in my playwright test, but I am getting an error saying that the method is not defined. I am using the latest version of playwright (1.12.3) and expect-playwright (0.11.0). I have tried to use the method in the following ways:

Using AI Code Generation

1const { test, expect } = require('@playwright/test');2test('basic test', async ({ page }) => {3  await expect(page.locator('text=Create a browser automation script in 5 minutes')).toContainText('Create a browser automation script in 5 minutes');4});5const { test, expect } = require('@playwright/test');6test('basic test', async ({ page }) => {7  await expect(page.locator('text=Create a browser automation script in 5 minutes')).toBeVisible();8  await expect(page.locator('text=Create a browser automation script in 5 minutes')).toContainText('Create a browser automation script in 5 minutes');9});10✓ basic test (1s)11  1 passed (3s)

Using AI Code Generation

1const { expect } = require('@playwright/test');2expect(page.locator('text=Hello')).toContainText('Hello');3const { expect } = require('@playwright/test');4expect(page.locator('text=Hello')).toContainText('Hello');5const { expect } = require('@playwright/test');6expect(page.locator('text=Hello')).toContainText('Hello');7const { expect } = require('@playwright/test');8expect(page.locator('text=Hello')).toContainText('Hello');9const { expect } = require('@playwright/test');10expect(page.locator('text=Hello')).toContainText('Hello');11const { expect } = require('@playwright/test');12expect(page.locator('text=Hello')).toContainText('Hello');13const { expect } = require('@playwright/test');14expect(page.locator('text=Hello')).toContainText('Hello');15const { expect } = require('@playwright/test');16expect(page.locator('text=Hello')).toContainText('Hello');17const { expect } = require('@playwright/test');18expect(page.locator('text=Hello')).toContainText('Hello');19const { expect } = require('@playwright/test');20expect(page.locator('text=Hello')).toContainText('Hello');21const { expect } = require('@playwright/test');22expect(page.locator('text=Hello')).toContainText('Hello');23const { expect } = require('@playwright/test');24expect(page.locator('text=Hello')).toContainText('Hello');25const { expect } = require('@playwright/test');26expect(page.locator('text=Hello')).toContainText('Hello');

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?

firefox browser does not start in playwright

Running Playwright in Azure Function

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

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

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

Blogs

Check out the latest blogs from LambdaTest on this topic:

Agile Testing is different – Here is what you need to know

Agile Testing is different- Here is what you need to know.og

Pair testing strategy in an Agile environment

Pair testing can help you complete your testing tasks faster and with higher quality. But who can do pair testing, and when should it be done? And what form of pair testing is best for your circumstance? Check out this blog for more information on how to conduct pair testing to optimize its benefits.

And the Winner Is: Aggregate Model-based Testing

In my last blog, I investigated both the stateless and the stateful class of model-based testing. Both have some advantages and disadvantages. You can use them for different types of systems, depending on whether a stateful solution is required or a stateless one is enough. However, a better solution is to use an aggregate technique that is appropriate for each system. Currently, the only aggregate solution is action-state testing, introduced in the book Paradigm Shift in Software Testing. This method is implemented in Harmony.

11 Best Mobile Automation Testing Tools In 2022

Mobile application development is on the rise like never before, and it proportionally invites the need to perform thorough testing with the right mobile testing strategies. The strategies majorly involve the usage of various mobile automation testing tools. Mobile testing tools help businesses automate their application testing and cut down the extra cost, time, and chances of human error.

Unveiling Samsung Galaxy Z Fold4 For Mobile App Testing

Hey LambdaTesters! We’ve got something special for you this week. ????

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.