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How to use h method in Playwright Internal

Best JavaScript code snippet using playwright-internal

settings.py

...9from email.policy import default10import os11from pathlib import Path12# Build paths inside the project like this: BASE_DIR / 'subdir'.13BASE_DIR = Path(__file__).resolve().parent.parent14# Quick-start development settings - unsuitable for production15# See https://docs.djangoproject.com/en/4.0/howto/deployment/checklist/16# SECURITY WARNING: keep the secret key used in production secret!17SECRET_KEY = 'django-insecure-an@&i+dshfwz)wj!qo&zu9inlf9rgcuo)(6ik&o!n3607hwe=n'18# SECURITY WARNING: don't run with debug turned on in production!19DEBUG = True20ALLOWED_HOSTS = ['*']21# Application definition22INSTALLED_APPS = [23    'django.contrib.admin',24    'django.contrib.auth',25    'django.contrib.contenttypes',26    'django.contrib.sessions',27    'django.contrib.messages',...

0001_initial.py

Source: 0001_initial.py

1# Generated by Django 4.0.2 on 2022-03-10 21:172from django.conf import settings3from django.db import migrations, models4import django.db.models.deletion5class Migration(migrations.Migration):6    initial = True7    dependencies = [8        ('posts', '0002_comments_post_date_comments_post_time'),9        migrations.swappable_dependency(settings.AUTH_USER_MODEL),10    ]11    operations = [12        migrations.CreateModel(13            name='Noti',14            fields=[15                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),16                ('noti', models.CharField(max_length=128, null=True)),17                ('post', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='posts.posts')),18                ('username', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),19            ],20        ),...

views.py

Source: views.py

1from rest_framework.views import APIView2from rest_framework.permissions import IsAuthenticated3from rest_framework.authentication import TokenAuthentication4from noti.models import Noti5from rest_framework.serializers import ModelSerializer6from django.contrib.auth.models import User7from rest_framework.response import Response8class NotiSerializer(ModelSerializer):9    class Meta:10        model = Noti11        fields = ['noti', 'post']12class NotiView(APIView):13    permission_classes = (IsAuthenticated,)14    authentication_classes = (TokenAuthentication,)15    def get(self, request):16        user = User.objects.get(username=request.user)17        noti = Noti.objects.filter(username=user)18        serializer = NotiSerializer(noti, many=True)...

models.py

Source: models.py

1from statistics import mode2from django.db import models3from django.contrib.auth.models import User4from posts.models import Posts5class Noti(models.Model):6    username = models.ForeignKey(User, on_delete=models.CASCADE)7    noti = models.CharField(max_length=128, null=True)8    post = models.ForeignKey(Posts, on_delete=models.CASCADE)9    def __str__(self):...

urls.py

Source: urls.py

1from django.urls import path, include2from noti.views import *3urlpatterns=[4 path('',NotiView.as_view())...

admin.py

Source: admin.py

1from django.contrib import admin2from noti.models import Noti ...

tests.py

Source: tests.py

1from django.test import TestCase...

__init__.py

Source: __init__.py

1undefined

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch({ headless: false });4  const context = await browser.newContext();5  const page = await context.newPage();6  await page.h('input[aria-label="Search"]');7  await page.fill('input[aria-label="Search"]', 'hello world');8  await page.press('input[aria-label="Search"]', 'Enter');9  await page.waitForTimeout(3000);10  await page.close();11  await context.close();12  await browser.close();13})();14const { chromium } = require('playwright');15(async () => {16  const browser = await chromium.launch({ headless: false });17  const context = await browser.newContext();18  const page = await context.newPage();19  await page.h('input[aria-label="Search"]');20  await page.fill('input[aria-label="Search"]', 'hello world');21  await page.press('input[aria-label="Search"]', 'Enter');22  await page.waitForTimeout(3000);23  await page.close();24  await context.close();25  await browser.close();26})();27const { chromium } = require('playwright');28(async () => {29  const browser = await chromium.launch({ headless: false });30  const context = await browser.newContext();31  const page = await context.newPage();32  await page.h('input[aria-label="Search"]');33  await page.fill('input[aria-label="Search"]', 'hello world');34  await page.press('input[aria-label="Search"]', 'Enter');35  await page.waitForTimeout(3000);36  await page.close();37  await context.close();38  await browser.close();39})();40const { chromium } = require('playwright');41(async () => {42  const browser = await chromium.launch({ headless: false });43  const context = await browser.newContext();44  const page = await context.newPage();45  await page.h('input

Using AI Code Generation

1const playwright = require('playwright');2(async () => {3  const browser = await playwright.chromium.launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  await page.screenshot({ path: 'google.png' });7  await browser.close();8})();9const playwright = require('playwright');10(async () => {11  const browser = await playwright.chromium.launch();12  const context = await browser.newContext();13  const page = await context.h.newPage();14  await page.screenshot({ path: 'google.png' });15  await browser.close();16})();17const playwright = require('playwright');18(async () => {19  const browser = await playwright.chromium.launch();20  const context = await browser.newContext();21  const page = await context.h.newPage();22  await page.screenshot({ path: 'google.png' });23  await browser.close();24})();

Using AI Code Generation

1const { h } = require('playwright');2const { test } = h;3test('test', async ({ page }) => {4  await page.screenshot({ path: 'screenshot.png' });5});6import { PlaywrightTestConfig } from '@playwright/test';7const config: PlaywrightTestConfig = {8  use: {9    viewport: { width: 1280, height: 720 },10  },11};12export default config;

Using AI Code Generation

1import { h } from '@playwright/test';2const { test } = h;3test('my test', async ({ page }) => {4});5import { PlaywrightTestConfig } from '@playwright/test';6const config: PlaywrightTestConfig = {7  use: {8  },9};10export default config;11{12  "scripts": {13  },14  "devDependencies": {15  }16}17  ✓ my test (1s)18  1 passed (4s)19  ✓ my test (1s)20  1 passed (3s)21  ✓ my test (1s)22  1 passed (3s)23  ✓ my test (1s)24  1 passed (3s)25  ✓ [chromium] my test (1s)

Using AI Code Generation

1const { h } = require('playwright');2const { test } = require('@playwright/test');3test('test', async ({ page }) => {4  const element = await page.$('div');5  const text = await page.evaluate(element => element.textContent, element);6  console.log(text);7});8const { h } = require('playwright');9const { test } = require('@playwright/test');10test('test', async ({ page }) => {11  const element = await page.$('div');12  const text = await page.evaluate(element => element.textContent, element);13  console.log(text);14});15const { h } = require('playwright');16const { test } = require('@playwright/test');17exports.helper = async ({ page }) => {18  const element = await page.$('div');19  const text = await page.evaluate(element => element.textContent, element);20  console.log(text);21};22const { test } = require('@playwright/test');23const { helper } = require('./helper.js');24test('test', helper);

Using AI Code Generation

1const { PlaywrightInternal } = require('playwright-internal');2const playwrightInternal = new PlaywrightInternal();3const { h } = playwrightInternal;4const element = h('div', { style: { color: 'red' } }, 'Hello World');5const { h } = require('playwright');6const element = h('div', { style: { color: 'red' } }, 'Hello World');7const { h } = require('playwright');8const element = h('div', { style: { color: 'red' } }, 'Hello World');9const { h } = require('playwright');10const element = h('div', { style: { color: 'red' } }, 'Hello World');11const { h } = require('playwright');12const element = h('div', { style: { color: 'red' } }, 'Hello World');13const { h } = require('playwright');14const element = h('div', { style: { color: 'red' } }, 'Hello World');15const { h } = require('playwright');16const element = h('div', { style: { color: 'red' } }, 'Hello World');17const { h } = require('playwright');18const element = h('div', { style: { color: 'red' } }, 'Hello World');19const { h } = require('playwright');20const element = h('div', { style: { color: 'red' } }, '

StackOverFlow community discussions

Questions

Discussion

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

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

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

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

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

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