@percy/appium-app

@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)
  • fullscreen: if the app is currently in fullscreen
  • 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
  • navigationBarHeight: In px if you want to override SDK
  • fullPage: true/false. [Experimental] only supported on App Automate driver sessions
  • 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: (optional) - [Experimental] offset from top of scrollview [ needs @percy/cli 1.20.2+ ]; int
    • bottomScrollviewOffset (optional) - [Experimental] offset from bottom of scrollview [ needs @percy/cli 1.20.2+ ]; int
  • screenLengths: int [Experimental] max screen lengths for fullPage
  • scrollableXpath (optional) - [Experimental] scrollable element xpath for fullpage; string
  • scrollableId (optional) - [Experimental] scrollable element accessibility id for fullpage; string
  • ignoreRegionXpaths (optional) - elements xpaths that user want to ignore in visual diff; list of string
  • ignoreRegionAccessibilityIds (optional) - elements accessibility_ids that user want to ignore in visual diff; list of string
  • ignoreRegionAppiumElements (optional) - appium elements that user want to ignore in visual diff; list of appium element object
  • customIgnoreRegions (optional) - 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.

    • Raises:Error: If top, bottom, left, or right is less than 0 or top is greater than or equal to bottom or left is greater than or equal to right.

    • valid: Ignore region should be within the boundaries of the screen.

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.
  • freezeAnimation - Boolean value by default it falls back to false, you can pass true and percy will freeze image based animations.
  • percyCSS - Custom CSS to be added to DOM before the screenshot being taken. Note: This gets removed once the screenshot is taken.
  • ignoreRegionXpaths - elements in the DOM can be ignored using xpath
  • ignoreRegionSelectors - elements in the DOM can be ignored using selectors.
  • ignoreRegionAppiumElements - elements can be ignored using appium_elements.
  • customIgnoreRegions - elements can be ignored using custom boundaries
    • IgnoreRegion:-

      • Description: This class represents a rectangular area on a screen that needs to be ignored for visual diff.

      • Constructor:

        init(self, 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.

      • Raises:ValueError: If top, bottom, left, or right is less than 0 or top is greater than or equal to bottom or left is greater than or equal to right.

      • valid: Ignore region should be within the boundaries of the screen.

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