Andrey Lushnikov 2064d27dc6
fix(installer): retain browsers installed via Playwrigth CLI (#5904)
Browser registry is responsible for 3 things:
1. Remove downloaded browsers if there are no packages that refer to them
2. Install default browsers needed for the current package
3. Install browsers on-demand when used through Playwright CLI

Currently, registry relies on a single "download" field in `browsers.json`
to carry both (1) and (2). However, browsers in (3) are marked as
`download: false` so that they aren't installed automatically in (2), so
auto-remove procedure in (1) removes them on subsequent installation.

One possible approach to fix this would be modifying package's `browsers.json` to
change `download: false` to `true` when browsers are installed with
Playwright CLI. This approach was explored here:
bc04a51800

We decided against this since we have a history of issues related to
package modifications after NPM installation. This breaks all
sorts of yarn/npm caching mechanisms.

Instead, this patch is a two-step refactor:
- remove the "download" field in `browsers.json`. Now, all registries
(including old ones from previously-released versions) will retain any
browsers that are mentioned in the `browsers.json`.
- add a new flag "installByDefault", that is **only used** for default
installation.

With this change, the registry tasks are done like this:
- (1) auto-removal: if browser has a back reference, it is retained,
otherwise it is removed from registry
- (2) default installation: use only `installByDefault` to carry default installations
- (3) CLI installation: simply installs browsers. Since we retain
everythings that's referenced in (1), browsers aren't removed.

Fixes #5902
2021-03-22 11:43:29 -07:00
2021-01-21 08:29:01 -08:00
2020-01-06 18:22:35 -08:00
2019-12-19 12:19:54 -08:00
2021-02-12 18:53:46 -08:00

🎭 Playwright

npm version Join Slack Chromium version Firefox version WebKit version

Documentation | API reference

Playwright is a Node.js library to automate Chromium, Firefox and WebKit with a single API. Playwright is built to enable cross-browser web automation that is ever-green, capable, reliable and fast.

Linux macOS Windows
Chromium 90.0.4430.0
WebKit 14.2
Firefox 87.0b10

Headless execution is supported for all the browsers on all platforms. Check out system requirements for details.

Usage

npm i -D playwright

This installs Playwright and browser binaries for Chromium, Firefox and WebKit. Once installed, you can require Playwright in a Node.js script and automate web browser interactions.

Capabilities

Playwright is built to automate the broad and growing set of web browser capabilities used by Single Page Apps and Progressive Web Apps.

  • Scenarios that span multiple page, domains and iframes
  • Auto-wait for elements to be ready before executing actions (like click, fill)
  • Intercept network activity for stubbing and mocking network requests
  • Emulate mobile devices, geolocation, permissions
  • Support for web components via shadow-piercing selectors
  • Native input events for mouse and keyboard
  • Upload and download files

Examples

Page screenshot

This code snippet navigates to whatsmyuseragent.org in Chromium, Firefox and WebKit, and saves 3 screenshots.

const playwright = require('playwright');

(async () => {
  for (const browserType of ['chromium', 'firefox', 'webkit']) {
    const browser = await playwright[browserType].launch();
    const context = await browser.newContext();
    const page = await context.newPage();
    await page.goto('http://whatsmyuseragent.org/');
    await page.screenshot({ path: `example-${browserType}.png` });
    await browser.close();
  }
})();

Mobile and geolocation

This snippet emulates Mobile Safari on a device at a given geolocation, navigates to maps.google.com, performs action and takes a screenshot.

const { webkit, devices } = require('playwright');
const iPhone11 = devices['iPhone 11 Pro'];

(async () => {
  const browser = await webkit.launch();
  const context = await browser.newContext({
    ...iPhone11,
    locale: 'en-US',
    geolocation: { longitude: 12.492507, latitude: 41.889938 },
    permissions: ['geolocation']
  });
  const page = await context.newPage();
  await page.goto('https://maps.google.com');
  await page.click('text="Your location"');
  await page.waitForRequest(/.*preview\/pwa/);
  await page.screenshot({ path: 'colosseum-iphone.png' });
  await browser.close();
})();

Evaluate in browser context

This code snippet navigates to example.com in Firefox, and executes a script in the page context.

const { firefox } = require('playwright');

(async () => {
  const browser = await firefox.launch();
  const context = await browser.newContext();
  const page = await context.newPage();
  await page.goto('https://www.example.com/');
  const dimensions = await page.evaluate(() => {
    return {
      width: document.documentElement.clientWidth,
      height: document.documentElement.clientHeight,
      deviceScaleFactor: window.devicePixelRatio
    }
  });
  console.log(dimensions);

  await browser.close();
})();

Intercept network requests

This code snippet sets up request routing for a WebKit page to log all network requests.

const { webkit } = require('playwright');

(async () => {
  const browser = await webkit.launch();
  const context = await browser.newContext();
  const page = await context.newPage();

  // Log and continue all network requests
  page.route('**', route => {
    console.log(route.request().url());
    route.continue();
  });

  await page.goto('http://todomvc.com');
  await browser.close();
})();

Resources

Description
Playwright is a framework for Web Testing and Automation. It allows testing Chromium, Firefox and WebKit with a single API.
Readme Apache-2.0 256 MiB
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