Check network over time with fast.com + ruby

fast.rb

require 'rubygems'
require 'capybara'
require 'capybara/dsl'
require 'capybara/rspec'
require 'capybara/poltergeist'
require 'csv'
require 'pry'

include Capybara::DSL
Capybara.register_driver :poltergeist do |app|
  Capybara::Poltergeist::Driver.new(app, {js_errors:false, port:44678+rand(5), phantomjs_options:['--proxy-type=none', '--ignore-ssl-errors=yes'], timeout:180, default_wait_time:180, window_size:[1920, 1080]})
end			       
Capybara.default_selector = :xpath


agents = [
  "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.36",
  "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2227.1 Safari/537.36",
  "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2227.0 Safari/537.36",
  "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2227.0 Safari/537.36",
  "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2226.0 Safari/537.36",
  "Mozilla/5.0 (Windows NT 6.4; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2225.0 Safari/537.36",
  "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2225.0 Safari/537.36",
  "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2224.3 Safari/537.36"
]

# Use XPath as the default selector for the find method
@session = Capybara::Session.new(:poltergeist)

@session.driver.headers = { 'User-Agent' =>  agents.sample }

(0..10).each do |i|
  @session.visit "https://www.fast.com"
  sleep 60
  @doc = Nokogiri::HTML(@session.html)
  
  results = @doc.xpath("//div[@class='speed-results-container succeeded']").text
  units = @doc.xpath("//div[@class='speed-units-container succeeded']").text
  final = "#{ Time.now };#{ results };#{ units }"
  puts final
  CSV.open("fast-com-#{ ARGV[0] }.csv", "ab") do |csv|
    csv << [Time.now, results, units]
  end
  sleep 300
end