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Appium LG WebOS Driver

An Appium 2.x driver for LG WebOS apps

⚠️ UNDER ACTIVE DEVELOPMENT ⚠️

Installation

If you're using the standard Appium CLI tool to manage drivers:

appium driver install --source=npm appium-lg-webos-driver

(Or if you're using NPM to manage dependencies, just include the appium-lg-webos-driver npm package in your package.json)

Additional Requirements

  • You must have the LG webOS SDK
  • You must have the LG_WEBOS_TV_SDK_HOME env var set as described in the SDK setup guide
  • You must have an LG webOS TV device on the same network as your Appium host, with all ports accessible to the network
  • The TV must be in Developer Mode (must have the Dev Mode app and be signed in, with Dev Mode actually turned "On" in the app)
  • You must have your TV device set up and showing as available using the ares-setup-device CLI tool
  • You should be able to run ares-device-info --device <name> and have it show the correct details for your connected device

Capabilities

Capability Description
platformName [Required] Must be LGTV
appium:automationName [Required] Must be webOS
appium:deviceName [Required] The name of the connected device, as it shows up in ares-launch --device-list
appium:deviceHost [Required] The IP address of the connected device, as it shows up in ares-launch --device-list
appium:appId [Required] The app package ID, if you want Appium to use an app already on the TV. Exclusive with appium:app
appium:app [Optional] An absolute path to your .ipk app file, if you want Appium to install the app.
appium:debuggerPort [Optional; default 9998] The port on the device exposed for remote Chromium debugging.
appium:chromedriverExecutable [Optional] Most LG TVs run a very old version of Chrome. Because this driver uses Chromedriver under the hood, you'll need to have a very old version of Chromedriver handy that works with the version of Chrome backing the apps on your TV. In our testing, we've found Chromedriver 2.36 to work with most TVs. You need to tell the driver where you've installed this version of Chromedriver using the appium:chromedriverExecutable capability, passing in an absolute path to the Chromedriver binary.
appium:websocketPort [Optional; default 3000] The websocket port on the device exposed for remote control
appium:autoExtendDevMode [Optional; default true] Whether you want Appium to extend the dev mode timer on the device whenever a new session starts.
appium:appLaunchParams [Optional; default {}] A key/value object of app launch param to be passed to ares-launch
appium:appLaunchCooldown [Optional; default 3000] How many ms to wait after triggering app launch to attempt to connect to it via Chromedriver.
appium:fullReset [Optional; default false] If this is set to true, the driver will: uninstall the app before starting the session. Cannot be used with appium:noReset
appium:noReset [Optional; default false] If this is set to true, the driver will: skip resetting local storage on session start. Cannot be used with appium:fullReset
appium:remoteOnly [Optional; default false] If this is set to true, the driver will not attempt to start Chromedriver and communicate via the debug protocol to the application. Instead the app will be launched, and nothing else. You will only have access to remote control commands in a "fire-and-forget" fashion. Useful when dealing with non-web-based apps.
appium:rcMode [Optional; default js; must be rc or js] When the value is js, the webos: pressKey command will operate with JS executed via Chromedriver. Otherwise, keys will be sent using the websocket remote control API. Note that when appium:remoteOnly is set to true, the value of appium:rcMode will always behave as if set to rc.
appium:keyCooldown [Optional; default 750] How long to wait in between remote key presses

Supported Commands

These are the WebDriver (and extension) commands supported by this driver. Note that in its normal operation, this driver acts as a Chromedriver proxy. Thus, after a session is created, all typical WebDriver commands are available (find element, get page source, click element, etc...). Some commands may not make sense in a TV context (dealing with multiple windows, for example).

Command Parameters Description
createSession capabilities Start a session using capabilities from the list above. This will launch your app in debug mode and start a Chromedriver proxy to the underyling TV browser
deleteSession Stop a session
executeScript script, args In the typical case, this executes JavaScript within the browser, just like the typical WebDriver method. If the script is prefixed with webos: , the driver will attempt to find a special "webOS command" to run with your provided args.

webOS Commands

As a way to provide access to additional commands unique to the webOS platform, this driver has extended the executeScript command in such a way that if you pass in a script like webos: scriptName, then the driver will execute a special webOS command named scriptName. The following webOS commands are available (note that in all these, the parameters list includes named parameters that must be present in a JSON object, constituting the first argument of the executeScript args list):

webOS Command Parameters Description
pressKey key, duration Press a remote key for duration milliseconds (defaults to 100). The value of key must be one of the values listed below

Example of using a webOS command (in the WebdriverIO JS client):

await driver.executeScript('webos: pressKey', [{key: 'right', duration: 200}]);

webOS Press Key keys

Here are the accepted values, based on the appium:rcMode. Casing does not matter.

When appium:rcMode is js:

  • enter
  • right
  • left
  • up
  • down
  • back
  • playPause
  • fwd
  • rev

When appium:rcMode is rc:

  • HOME
  • LEFT
  • RIGHT
  • UP
  • DOWN
  • ENTER
  • BACK
  • VOL_UP
  • VOL_DOWN
  • MUTE
  • UNMUTE
  • PLAY
  • STOP
  • REWIND
  • FF
  • CHAN_UP
  • CHAN_DOWN

Development

This project is developed using Node.js. To work on it, clone the repo and run npm install inside it.

Developer Scripts

Script Description
npm run build Transpile the code
npm run dev Same as build but watch for changes
npm run lint Check code style
npm run clean Remove all build and NPM artifacts
npm run reinstall clean plus install
npm run test:unit Run unit tests
npm run test:e2e Run e2e tests
npm run test Run unit tests

E2E Tests

Currently, the E2E tests require the use of an app not bundled with the project. It can be downloaded from Suitest at this location: webos.ipk.

Some environment variables must be set before running npm run test:e2e:

  • TEST_APP: the path on your local system to the IPK file.
  • TEST_DEVICE: the name of the LG device as it is shown when connected via ares-setup-device.
  • TEST_DEVICE_HOST: the IP address of the connected LG TV.