Selenium WebDriverJS, cannot build webdriver for Chrome

Question

I am having some trouble setting up Selenium WebDriverJS. My goal is to run selenium tests on Chrome browser using Javascript (node).

I am following the instructions on https://code.google.com/p/selenium/wiki/WebDriverJs as well as https://code.google.com/p/chromedriver/wiki/GettingStarted

First I downloaded the chromedriver, and ran it on a terminal:

$ ./chromedriver
Starting ChromeDriver (v2.2) on port 9515

And then, I installed selenium-webdriver:

$ npm install selenium-webdriver
npm http GET https://registry.npmjs.org/selenium-webdriver
npm http 304 https://registry.npmjs.org/selenium-webdriver
[email protected] node_modules/selenium-webdriver

Then, I started node console and tried to build the webdriver instance

$ node
> var webdriver = require('selenium-webdriver')
undefined
> var driver = new webdriver.Builder().usingServer('http://localhost:9515/wd/hub').withCapabilities(webdriver.Capabilities.chrome()).build();
undefined
> 
timers.js:103
            if (!process.listeners('uncaughtException').length) throw e;
                                                                      ^
UnknownCommandError: unknown command: wd/hub/session
    at new bot.Error (/selenium/node_modules/selenium-webdriver/lib/atoms/error.js:109:18)
    at Object.bot.response.checkResponse (/selenium/node_modules/selenium-webdriver/lib/atoms/response.js:103:11)
    at /selenium/node_modules/selenium-webdriver/lib/webdriver/webdriver.js:133:20
    at /selenium/node_modules/selenium-webdriver/lib/goog/base.js:1178:15
    at webdriver.promise.ControlFlow.runInNewFrame_ (/selenium-webdriver/lib/webdriver/promise.js:1438:20)
    at notify (/selenium/node_modules/selenium-webdriver/lib/webdriver/promise.js:328:12)
    at notifyAll (/selenium/node_modules/selenium-webdriver/lib/webdriver/promise.js:297:7)
    at fulfill (/selenium/

And now I am blocked. Can someone help me on this, please? What am I missing here?

Thanks

Answer 1

Couple of things here.

1. By default, the chromedriver server handles commands at /, not /wd/hub. So you should be able to do:

   new webdriver.Builder().usingServer('http://localhost:9515').build();
   

2. If you want the chromedriver to have the same signature as the standalone Selenium server, start it with --url-base=/wd/hub.

3. There's no need to start the chromedriver yourself - selenium-webdriver will do it for you if you request Chrome and omit a server location (make sure chromedriver can be found on your system PATH):

   new webdriver.Builder()
       .withCapabilities(webdriver.Capabilities.chrome())
       .build();