headless ruby cukes

require 'cucumber'
require 'selenium-webdriver'
# require 'cukehub' # optional, but recommended. See cukehub.com for more details

caps = Selenium::WebDriver::Remote::Capabilities.chrome(chromeOptions: { binary: "/Applications/Google\ Chrome\ Canary.app/Contents/MacOS/Google\ Chrome\ Canary", 
                                                                         args: [ "--headless" ]})

Before do
  @browser = Selenium::WebDriver.for :chrome, desired_capabilities: caps
end