generate.rb

require 'forgery'
require 'csv'
require 'blundersaur'
require 'pp'

original = CSV.open("original.csv", "w")
fudged = CSV.open("fudged.csv", "w")

headers = %w{id first_name last_name dob age street_address city state zip ssn}
original << headers
fudged << headers

100.times do |i|
  male = rand(2) == 1
  entity = {
    'id' => (i + 1).to_s,
    'first_name' => Forgery(:name).send(male ? :male_first_name : :female_first_name),
    'last_name' => Forgery(:name).last_name,
    'dob_date' => Forgery(:date).date(:past => true, :min_delta => 3650, :max_delta => 18250),
    'street_address' => Forgery(:address).street_address,
    'city' => Forgery(:address).city,
    'state' => Forgery(:address).state,
    'zip' => Forgery(:address).zip.to_s,
    'ssn' => "%09d" % rand(1000000000)
  }
  entity['dob'] = entity['dob_date'].strftime("%Y-%m-%d")

  # calculate age
  dob = entity['dob_date']
  date_1 = Date.today
  date_2 = Date.new(dob.year, date_1.month, date_1.day)
  entity['age'] = (date_1.year - dob.year - (date_2 >= dob ? 0 : 1)).to_s

  row = entity.values_at(*headers)
  original << row

  row.each_with_index do |val, i|
    if rand(5) == 0
      row[i] = val.random_mistake
    end
  end
  fudged << row
end

original.close
fudged.close