BrowserStackSampleLocal.js

let wd = require('wd');
let assert = require('assert');
let asserters = wd.asserters;
let Q = wd.Q;
let browserstack = require('browserstack-local');

// Set your BrowserStack access credentials
let userName = 'YOUR_USERNAME'
let accessKey = "YOUR_ACCESS_KEY"

desiredCaps = {
   'browserstack.user' : userName,
   'browserstack.key' : accessKey,

   // Set URL of the application under test
   'app' : 'bs://<app-id>',

  // Specify device and os_version for testing
  'device' : 'Google Pixel 3',
  'os_version' : '9.0',

  //Set browserstack.local capability as true
  'browserstack.local' : true,

  // Set other BrowserStack capabilities
  'project' : 'First NodeJS project',
  'build' : 'browserstack-build-1',
  'name': 'local_test',
  'browserstack.debug' : true,
};

let promise = new Promise(function(resolve, reject) {
  // Start BrowserStack Local
  exports.bs_local = new browserstack.Local();
  exports.bs_local.start({'key':  accessKey}, (error) => {
    if (error) return reject(error);
    console.log('BrowserStack Local connected.');
    resolve();
  });
});

promise.then(function() {
    // Initialize the remote Webdriver using BrowserStack remote URL
    // and desired capabilities defined above
    driver = wd.promiseRemote("http://hub-cloud.browserstack.com/wd/hub");

    // Test case for the BrowserStack sample Android Local app. 
    // If you have uploaded your app, update the test case here. 
    driver.init(desiredCaps)
    .then(function () {
      return driver.waitForElementById('com.example.android.basicnetworking:id/test_action', asserters.isDisplayed && asserters.isEnabled, 30000);
    })
    .then(function (testElement) {
      return testElement.click();
    })
    .then(function () {
      return driver.waitForElementsByClassName('android.widget.TextView', asserters.isDisplayed, 30000);
    })
    .then(function (textElements) {
      return Q().then(function () {
        return textElements.map(function (textElement) {
          return textElement.text().then(function(value) {
            if (value.indexOf('The active connection is') !== -1) {
              console.log(value);
              assert(value.indexOf('The active connection is wifi') !== -1);
              assert(value.indexOf('Up and running') !== -1);
            }
          });
        })
      }).all()
    })
    .fin(function() { 
      // Invoke driver.quit() after the test is done to indicate that the test is completed.  
      return driver.quit(); 
    })
    .done(function() {
       // Stop BrowserStack Local
        exports.bs_local.stop((error) => {
          if(error) return console.log("Error in stopping BrowserStack Local :"+ error)
          console.log("Stopped BrowserStack Local")
        })
    });  
}, function(error) { 
    console.log("Failed to start BrowserStack Local :" + error)
})