faker

https://github.com/faker-ruby/faker

Ruby

A library for generating fake data such as names, addresses, and phone numbers.

Faker::IdNumber.brazilian_cpf

No Docs, write some!

Source | Google | Stack overflow

Edit

git clone [email protected]:faker-ruby/faker.git
cd faker
open lib/faker/default/id_number.rb

Contribute

# Make a new branch
git checkout -b -your-name--update-docs-Faker--IdNumber-brazilian_cpf-for-pr

# Commit to git
git add lib/faker/default/id_number.rbgit commit -m "better docs for Faker::IdNumber.brazilian_cpf"

# Open pull request
gem install hub # on a mac you can `brew install hub`
hub fork
git push <your name> -your-name--update-docs-Faker--IdNumber-brazilian_cpf-for-pr
hub pull-request

# Celebrate!