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@percy/playwright

Version Test

Percy visual testing for Playwright.

Installation

$ npm install --save-dev @percy/cli @percy/playwright

Usage

This is an example using the percySnapshot function. For other examples of playwright usage, see the Playwright docs.

const { chromium } = require('playwright');
const percySnapshot = require('@percy/playwright');

(async () => {
  const browser = await chromium.launch();
  const page = await browser.newPage();
  await page.goto('http://example.com/', { waitUntil: 'networkidle2' });
  await percySnapshot(page, 'Example Site');

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

Running the code above directly will result in the following logs:

$ node script.js
[percy] Percy is not running, disabling snapshots

When running with percy exec, and your project's PERCY_TOKEN, a new Percy build will be created and snapshots will be uploaded to your project.

$ export PERCY_TOKEN=[your-project-token]
$ percy exec -- node script.js
[percy] Percy has started!
[percy] Created build #1: https://percy.io/[your-project]
[percy] Running "node script.js"
[percy] Snapshot taken "Example Site"
[percy] Stopping percy...
[percy] Finalized build #1: https://percy.io/[your-project]
[percy] Done!

Configuration

percySnapshot(page, name[, options])

Percy on Automate

Usage

const { chromium } = require('playwright');
const percyScreenshot = require('@percy/playwright');

const desired_cap = {
  'browser': 'chrome',
  'browser_version': 'latest',
  'os': 'osx',
  'os_version': 'ventura',
  'name': 'Percy Playwright PoA Demo',
  'build': 'percy-playwright-javascript-tutorial',
  'browserstack.username': 'username',
  'browserstack.accessKey': 'accesskey'
};

(async () => {
  const cdpUrl = `wss://cdp.browserstack.com/playwright?caps=${encodeURIComponent(JSON.stringify(desired_cap))}`;
  const browser = await chromium.connect(cdpUrl);
  const page = await browser.newPage();
  await page.goto("https://percy.io/");
  await percyScreenshot(page, 'Screenshot 1');

  // Options for percyScreenshot
  // await percyScreenshot(page, 'Screenshot 1', {
  //   fullPage: true,
  //   percyCSS: 'body { background: red; }',
  //   ignoreRegionSelectors: ['#ignore-this'],
  //   customIgnoreRegions: [{ top: 10, right: 10, bottom: 120, left: 10 }],
  // });

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

Configuration

percyScreenshot(page, name[, options])

  • page (required) - A playwright page instance
  • name (required) - The snapshot name; must be unique to each snapshot
  • options (optional) - There are various options supported by percyScreenshot to server further functionality.
    • sync - Boolean value by default it falls back to false, Gives the processed result around screenshot [From CLI v1.28.8+]
    • fullPage - Boolean value by default it falls back to false, Takes full page screenshot [From CLI v1.27.6+]
    • freezeAnimatedImage - Boolean value by default it falls back to false, you can pass true and percy will freeze image based animations.
    • freezeImageBySelectors - List of selectors. Images will be freezed which are passed using selectors. For this to work freezeAnimatedImage must be set to true.
    • freezeImageByXpaths - List of xpaths. Images will be freezed which are passed using xpaths. For this to work freezeAnimatedImage must be set to true.
    • percyCSS - Custom CSS to be added to DOM before the screenshot being taken. Note: This gets removed once the screenshot is taken.
    • ignoreRegionXpaths - List of xpaths. elements in the DOM can be ignored using xpath
    • ignoreRegionSelectors - List of selectors. elements in the DOM can be ignored using selectors.
    • customIgnoreRegions - List of custom objects. elements can be ignored using custom boundaries. Just passing a simple object for it like below.
      • example: {top: 10, right: 10, bottom: 120, left: 10}
      • In above example it will draw rectangle of ignore region as per given coordinates.
        • top (int): Top coordinate of the ignore region.
        • bottom (int): Bottom coordinate of the ignore region.
        • left (int): Left coordinate of the ignore region.
        • right (int): Right coordinate of the ignore region.
    • considerRegionXpaths - List of xpaths. elements in the DOM can be considered for diffing and will be ignored by Intelli Ignore using xpaths.
    • considerRegionSelectors - List of selectors. elements in the DOM can be considered for diffing and will be ignored by Intelli Ignore using selectors.
    • customConsiderRegions - List of custom objects. elements can be considered for diffing and will be ignored by Intelli Ignore using custom boundaries
      • example: {top: 10, right: 10, bottom: 120, left: 10}
      • In above example it will draw rectangle of consider region will be drawn.
      • Parameters:
        • top (int): Top coordinate of the consider region.
        • bottom (int): Bottom coordinate of the consider region.
        • left (int): Left coordinate of the consider region.
        • right (int): Right coordinate of the consider region.

Creating Percy on automate build

Note: Automate Percy Token starts with auto keyword. The command can be triggered using exec keyword.

$ export PERCY_TOKEN=[your-project-token]
$ percy exec -- [playwright test command]
[percy] Percy has started!
[percy] [Playwright example] : Starting automate screenshot ...
[percy] Screenshot taken "Playwright example"
[percy] Stopping percy...
[percy] Finalized build #1: https://percy.io/[your-project]
[percy] Done!

Refer to docs here: Percy on Automate