data-transfer-test/models/rate.rb

require 'speedtest'
require 'sinatra/activerecord'

class Rate < ActiveRecord::Base
  def self.get_download
    all.collect { |p| [p.created_at.strftime('%d/%m %H:%M'), p.download] }
  end

  def self.get_upload
    all.collect { |p| [p.created_at.strftime('%d/%m %H:%M'), p.upload] }
  end

  def self.save
    test = Speedtest::Test.new(debug: false)
    result = test.run
    
    Rate.create({
      download: result.pretty_download_rate,
      upload: result.pretty_upload_rate,
    })
  end
end