inject_cookies.rb

# prereq: have sauce username and accesskey set as environment variables
# i.e. export SAUCE_USERNAME=YOUR_USERNAME
#      export SAUCE_ACCESS_KEY=YOUR_ACCESS_KEY

require 'selenium-webdriver'

url = "http://#{ENV['SAUCE_USERNAME']}:#{ENV['SAUCE_ACCESS_KEY']}@ondemand.saucelabs.com:80/wd/hub".strip

browser = Selenium::WebDriver.for(:remote, :url => url,
				:desired_capabilities => { 
					:browserName => 'firefox',
					:version => '40',
					:platform => 'Windows 7'
				})

browser.manage.add_cookie({
	:name => 'CookieName',
	:value => 'CookieValue',
	:path => '/',
	:secure => false
})

puts "Printing out cookies : #{browser.manage.all_cookies}"

# go to URL / app where authentication was needed / prompted.

# i.e.
# browser.get 'http://yourwebsite.com'

# ...