test.rb

require 'faraday'
require 'faraday_middleware'
require 'byebug'

def connection
  @connection ||= 
    Faraday::Connection.new 'http://www.letsrevolutionizetesting.com/' do |c|
    c.request :json

    c.response :json, :content_type => /\bjson$/

    c.adapter Faraday.default_adapter
  end
end

def follow url
  response = connection.get url
  puts response.body
  uri = URI.parse(response.body['follow'])
  "#{uri.path}.json?#{uri.query}"
rescue Exception => e
  puts e
  byebug
end

next_url = "challenge.json"

while true do 
  next_url = follow(next_url)
end