@percy/appium-app

Percy visual testing Appium (wd) and WebdriverIO

Installation

$ npm install --save-dev @percy/cli @percy/appium-app

Notes:

Minimum required version for @percy/cli is 1.25.0 for this package to work correctly.

This is tested on node 14+ and should be compatible with all newer node versions

Usage

This is an example test using the percyScreenshot function.

const percyScreenshot = require('@percy/appium-app');

describe('Appium webdriverio test example', function() {
  it('takes a screenshot', async () => {
    await percyScreenshot('Appium JS example');
  });
});

describe('Appium wd test example', function() {
  it('takes a screenshot', async () => {
    driver = // use your existing way to create appium driver with wd
    await percyScreenshot(driver, 'Appium JS example');
  });
});

Running the test above normally will result in the following log:

[percy] Percy is not running, disabling screenshots

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

$ export PERCY_TOKEN=[your-project-token]
$ percy app:exec -- [appium test command]
[percy] Percy has started!
[percy] Created build #1: https://percy.io/[your-project]
[percy] Screenshot taken "Appium JS example"
[percy] Stopping percy...
[percy] Finalized build #1: https://percy.io/[your-project]
[percy] Done!

Configuration

percyScreenshot(driver, name[, {
  fullscreen,
  deviceName,
  orientation,
  statusBarHeight,
  navigationBarHeight
}])

• driver (required) - A appium driver instance [ can be skipped in case of webdriverio runner]
• name (required) - The screenshot name; must be unique to each screenshot
• options object (optional)
  • sync - Boolean value by default it falls back to false, Gives the processed result around screenshot [From CLI v1.28.0-beta.0+]
  • fullscreen: If the app is currently in fullscreen; boolean
  • deviceName: Custom device name to override SDK fetched name
  • orientation: ["portrait"/"landscape"] - Tell SDK which orientation app is in [ Note: This is only for tagging purpose, does not change the orientation of the device ]
  • statusBarHeight: In px if you want to override SDK; int
  • navigationBarHeight: In px if you want to override SDK; int
  • fullPage: [Alpha] Only supported on App Automate driver sessions [ needs @percy/cli 1.20.2+ ]; boolean
    • screenLengths: [Alpha] Max screen lengths for fullPage; int
    • In case scrollview is overlapping with other app elements. Offsets can be provided to reduce the area which needs to be considered for scrolling:
      • topScrollviewOffset: [Alpha] Offset from top of scrollview; int
      • bottomScrollviewOffset: [Alpha] Offset from bottom of scrollview; int
  • scrollableXpath [Alpha] Scrollable element xpath for fullpage; string
  • scrollableId: [Alpha] Scrollable element accessibility id for fullpage; string
  • ignoreRegionXpaths: Elements xpaths that user want to ignore in visual diff; list of string
  • ignoreRegionAccessibilityIds: Elements accessibility_ids that user want to ignore in visual diff; list of string
  • ignoreRegionAppiumElements: Appium elements that user want to ignore in visual diff; list of appium element object
  • customIgnoreRegions: Custom locations that user want to ignore in visual diff; list of ignore_region object
  • IgnoreRegion:-
    • Description: This class represents a rectangular area on a screen that needs to be ignored for visual diff.
    • Constructor:

      constructor(top, bottom, left, right)

    • Parameters:
      • 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.

Running with Hybrid Apps

For a hybrid app, we need to switch to native context before taking screenshot.

• Add a helper method similar to following for say flutter based hybrid app:

async function percyScreenshotFlutter(driver, name, options) {
  // switch to native context
  await driver.switchContext('NATIVE_APP');
  await percyScreenshot(driver, name, options);
  // switch back to flutter context
  await driver.switchContext('FLUTTER');
}

• Call percyScreenshotFlutter helper function when you want to take screenshot.

await percyScreenshotFlutter(driver, name[, {
  fullscreen,
  deviceName,
  orientation,
  statusBarHeight,
  navigationBarHeight
}])

Note:

For other hybrid apps the await driver.switchContext('FLUTTER'); would change to context that it uses like say WEBVIEW etc.

Running Percy on Automate

percyScreenshot(driver, name, options) [ needs @percy/cli 1.27.0-beta.0+ ];

• driver (required) - A appium driver instance
• name (required) - The screenshot name; must be unique to each screenshot
• options (optional) - There are various options supported by percy_screenshot to server further functionality.
  • 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.
  • ignoreRegionAppiumElements - List of appium web-element. elements can be ignored using appiumElements.
  • 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.
  • considerRegionAppiumElements - List of appium web-element. elements can be considered for diffing and will be ignored by Intelli Ignore using appium_elements.
  • 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.
  • androidScrollAreaPercentage - Percentage Area to scroll for android devices. (should be between 0 and 100)
  • scrollSpeed - Scroll speed in pixel/second. (Should be between 0 and 5000)

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 -- [python test command]
[percy] Percy has started!
[percy] [Python example] : Starting automate screenshot ...
[percy] Screenshot taken "Python example"
[percy] Stopping percy...
[percy] Finalized build #1: https://percy.io/[your-project]
[percy] Done!

Refer to docs here: Percy on Automate