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With Sauce Labs you can run automated tests of your web apps against a wide variety of device/operating system/browser combinations.  This topic will provide you with basic information and code examples to get your Ruby tests up and running on Sauce.

Example Only

The code in this topic is presented as an example only, since your tests and testing environments may require specialized scripting. This information should be taken only as an illustration of how you could set up your tests with Sauce Labs, and is not directly supported by Sauce.


Quick Start

It's very easy to get your existing Ruby tests up and running on Sauce. 

Set Sauce URL and Access Credentials

If you wanted to run a Selenium test on Selenium locally, you would initiate a driver for the browser you want to test against like this.

Local Ruby Test Example
driver = Selenium::WebDriver.for :firefox 

To run a test on a remote service like Sauce Labs, all you need to change is your driver definition, and make sure that the sauce_endpoint variable includes your Sauce USERNAME and ACCESSKEY.

Remote Ruby Test on Sauce Example
driver = Selenium::WebDriver.for :remote, :url => sauce_endpoint, :desired_capabilities => caps
sauce_endpoint = ""

To find your Sauce Labs access key:

  1. Sign in to with the username you set up when you created your account. 
    You will use this same username in your test script. 
  2. To find your access key:
    1. Click your name in the Account Profile menu in the upper-right corner.
    2. Click User Settings.
    3. Scroll down to Access Key and click Show.
    4. Enter the password you use to sign in to Sauce Labs to view the access key.
    5. Click the Copy icon.

IP Ranges and Data Center Endpoints
Sauce Labs has data centers in both the US and EU. You can access Sauce Labs services from either location by providing the appropriate URL endpoints, and whitelisting their associated IP ranges. 

 US Data Center

Virtual Device Cloud:
Sauce Connect Proxy:
IP Ranges: (this is equivalent to the range – (this is equivalent to the range -

Set Desired Capabiliites

Once you have your tests set up to run in the Sauce cloud, you need to define the platform, browser, and version you want the test to run against, which is where :desired_capabilites and caps come into play. 

caps = { :platform => "Mac OS X 10.9", :browserName => "Chrome", :version => "31" }

You can manually enter the values you want for :platform:browsername, and :version, or you can use the handy Platform Configurator to generate the caps values for any combination of platform, browser, and browser version. 

Code Sample

This Ruby example script executes a simple test to open a browser, navigate to the Sauce Labs demo web app, and then close the browser. It also incorporate a number of best practices, such as using environment variables for authentication credentials, and is set up to use RSpec to report Pass/Fail results to your Sauce Labs dashboard. You can clone this script directly from the saucelabs-training GitHub repo and modify it as you want to test your authentication credentials, set desired capabilities, and run tests against your own web app. 
 Click here to view the example script

require "selenium-webdriver"
require "rspec"
require "sauce_whisk"

describe "Instant_RSpec_Test4" do
  before(:each) do |test|
    caps = {
        browser_name: 'chrome',
        platform_name: 'windows 10',
        browser_version: '71.0',
        "goog:chromeOptions" => {w3c: true},
        "sauce:options" => {
            name: test.full_description,
            seleniumVersion: '3.141.59',
            username: ENV['SAUCE_USERNAME'],
            accessKey: ENV['SAUCE_ACCESS_KEY'],
            # best practices involve setting a build number for version control
            build: 'build-0.0.1',
            # tags to filter test reporting.
            tags: ['instant-sauce', 'ruby-rspec', 'module4'],
            # setting sauce-runner specific parameters such as timeouts helps
            # manage test execution speed.
            maxDuration: 1800,
            commandTimeout: 300,
            idleTimeout: 1000
    @driver = Selenium::WebDriver.for(:remote,
                                      url: '',
                                      desired_capabilities: caps)
  it "should_open_chrome" do
    puts "title of webpage is: #{@driver.title}"
  after(:each) do |example|
    SauceWhisk::Jobs.change_status(@driver.session_id, !example.exception)

Running Local Tests

Developing websites/apps within your local network is secure and efficient. The drawback to this method is that local assets are not publicly-accessible on the Internet, so the browsers/devices in the Sauce Labs cloud can't load and test your app. The solution is to use Sauce ConnectSauce Connect is a proxy server that creates a secure tunnel connection between the Sauce Labs virtual machine that runs your test and your local  network. You can also use Sauce Connect to test applications and websites that are located within your corporate firewall. Sauce Connect is not required to run tests on Sauce Labs, only in situations where the application or website you want to test is not publicly accessible. 

Running Tests in Parallel

Now that you’re running tests on Sauce, you may wonder how you can run your tests faster. One way to increase speed is by running tests in parallel across multiple virtual machines.

You can run your tests in parallel at two levels, and you can run your tests in parallel across multiple browsers. For example, if you have 10 tests and want to run on five browsers, this would be parallelism of five. You can also run tests across browsers and each test in parallel. Using our previous example this would be more like 50 parallel tests. Doing this requires that your tests are written in a way that they do not collide with one another, as described in our Best Practice topics avoiding external test dependencies and avoiding dependencies between tests.

Match Thread Count to Concurrency Limit

You should match your thread count to your concurrency limit, which is shown in the My Account section of your user profile information on the Sauce Labs dashboard.  

For more information, check out the example scripts in our GitHub repo

Reporting on Test Results

Selenium is a protocol focused on automating the actions of a browser, and as such, it doesn't encompass the notions of a "test" that "passes" or "fails." Sauce Labs lets you notify us of test status using our REST API. All you need is the ID Sauce Labs gave the job, and the status your test ended with. Then, you can use the Update Job method on the REST API to set the job's status.

The Job ID is the simplest part of the process. The ID assigned to each job by Sauce Labs is the same as the Session ID for the corresponding Selenium session, which you can pull off the driver like so:

job_id = driver.session_id 

Using the REST API is best done with the sauce_whisk gem, which assumes you've set your Sauce username and access key as the SAUCE_USERNAME and SAUCE_ACCESS_KEY environment variables.

This example shows how you would modify the example RSpec spec_helper.rb file to check the status of the test, and pass that to the REST API.

Modifying spec_helper.rb to Report Test Results to the Dashboard Using the sauce-whisk Gem
require "sauce_whisk"

RSpec.configure do |config|
  config.around(:example, :run_on_sauce => true) do |example|
    @driver = SauceDriver.new_driver
    @job_id = @driver.session_id
      SauceWhisk::Jobs.change_status job_id, !example.exception.nil?

That's it! Your tests will now be reporting their status to the Sauce Labs REST API.

1 Comment

  1. Anonymous

    Why aren't HTTPS endpoints used here?