# if it was in ruby without the imports and all

driver = Selenium::WebDriver.for :firefox
user_data = [
              { :user => 'blabla', :password => 'blabla', :base_url => 'iam.fake'},
              { :user => 'blabl2a', :password => 'blabla2', :base_url => 'iam2.fake'}
            ]
user_data.each do |data|
 driver.get(data[:base_url])
 driver.find_element(:id, 'userInput').send_keys(data[:user])
 driver.find_element(:id, 'passwordInput').send_keys(data[:password])
 # do whatever assertion you want
 end