const wdio = require('webdriverio');
// Driver options
const opts = {
  port: 4723,
  desiredCapabilities: {
    platformName: "Android",
    platformVersion: "8.0",
    deviceName: "Nexus 5X API 26",
    app: "ApiDemos-debug.apk",
    appPackage: "io.appium.android.apis",
    appActivity: "",
    automationName: "UiAutomator2"
  }
};
// load the driver with capabilities
const client = wdio.remote(opts);
//
// invoke some Appium commands
client
  .init()
  .click("~App")
  .click("~Alert Dialogs")
  .back()
  .back()
  .end();