Run Rspec tests on multiple browser parallely as like TestNG

[Maheswaran Palanisamy]

I want to run my scripts on both firefox and chrome at a time in rspec. wanted to know is it possible ? 

And My Driver.rb file looks like

RSpec.configure do |config|
  config.before(:all) do
   

    ###############################################################################################################################################
    ####Running in Multiple browsers
    ###############################################################################################################################################


    def firefox()
      puts "begin firefox"
      path = File.dirname(__FILE__) + "/driver/geckodriver"
      begin
        @driver = Selenium::WebDriver.for :firefox
        puts "Starting tests, initializing " + @driver.inspect()
      rescue Exception=>e
        puts "Start Exception"
        puts e.message
        puts e.backtrace.inspect
        raise e
      end
      @base_url = @test_env['url']
      @driver.manage.window.maximize
      @accept_next_alert = true
      @driver.manage.timeouts.implicit_wait = DEFAULT_WAIT_TIME
    end


    def chrome
      puts "begin chrome"
      path = File.dirname(__FILE__) + "/../driver/chromedriver"
      prefs = {:download => {:prompt_for_download => false, :default_directory => "#{ENV['PATH']}", :url => @base_url} }
      @driver = Selenium::WebDriver.for :chrome, :prefs => prefs
      @base_url = @test_env['url']
      @accept_next_alert = true
    end

    begin
      puts "begin firefox"
      firefox
    rescue Exception=>e
      # Exception already displayed, exiting
      puts "Exception Found: #{e}"
      raise e
      @driver.quit
    end


  config.after(:all) do
    puts "Finishing tests, killing " + @driver.inspect()
    @driver.quit
  end