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CONTRIBUTING.md

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We love pull requests. Here's a quick guide:

  1. Fork the repo.

  2. Run the tests. We only take pull requests with passing tests, and it's great to know that you have a clean slate: bundle && bundle exec rake

  3. We are using RuboCop because we love static code analyzers.

    • Ways to run RuboCop:
      • bundle exec rubocop
      • bundle exec rake would run the test suite and after that it runs the Ruby static code analyzer.

  4. Please add a test for your change. Only refactoring and documentation changes require no new tests. If you are adding functionality or fixing a bug, we need a test! We use Minitest in this project.

  5. Make the test pass. Always use sample, shuffle, and rand from the Base class (just like the rest of the code) rather than Array#sample, Array#shuffle and Kernel#rand to preserve the deterministic feature.

  6. We care about code coverage and use SimpleCov to analyze the code and generate test coverage reports. It's possible to check the test coverage by running open coverage/index.html. Please make sure to not decrease our current % covered and add appropriate test cases when necessary.

  7. When adding a new class, add a new yaml file to lib/locales/en rather than adding translations to lib/locales/en.yml. For example, if you add Faker::MyThing, put your translations in lib/locales/en/my_thing.yml. See the locale README for more info.

  8. When removing a method, don't forget to deprecate it. You can extend Gem::Deprecate and use the deprecate method to accomplish this task.

  9. Methods with optional arguments should use keyword rather than positional arguments. An exception to this could be a method that takes only one optional argument, and it's unlikely that that method would ever take more than one optional argument.

  10. Push to your fork and submit a pull request.

Github Flow for contributors and collaborators

For those of you with commit access, please check out Scott Chacon's blog post about github flow

  • Anything in the master branch is deployable
  • To work on something new, create a descriptively named branch off of master (ie: new-oauth2-scopes)
  • Commit to that branch locally and regularly push your work to the same named branch on the server
  • When you need feedback or help, or you think the branch is ready for merging, open a pull request
  • After someone else has reviewed and signed off on the feature, you can merge it into master

If you're reviewing a PR, you should ask yourself:

  • Does it work as described? A PR should have a great description.
  • Is it understandable?
  • Is it well implemented?
  • Is it well tested?
  • Is it well documented?
  • Is it following the structure of the project?

Syntax/Good practices:

Documentation

Include YARD style docs for all methods that includes:

  • A short description of what the method generates
  • Descriptions for all params (@param)
  • The return type (@return)
  • At least one example of the output (@example)
  • The version that the method was added (@faker.version)
    • Set as next for new methods
##
# Produces a random string of alphabetic characters, (no digits)
#
# @param char_count [Integer] The length of the string to generate
#
# @return [String]
#
# @example
#   Faker::Alphanumeric.alpha #=> "kgdpxlgwjirlqhwhrebvuomdcjjpeqlq"
#   Faker::Alphanumeric.alpha(number: 10) #=> "zlvubkrwga"
#
# @faker.version next
def alpha(number: 32)
    # ...
end

Code Styles

Please follow these guidelines when adding new code:

  • Two spaces, no tabs.
  • No trailing whitespace. Blank lines should not have any space.
  • Prefer &&, || over and, or.
  • MyClass.my_method(my_arg) not my_method( my_arg ) or my_method my_arg.
  • a = b and not a=b.
  • In general, follow the conventions you see used in the source already.
  • ALL SHALL OBEY THE RUBOCOP

YAML

Please use dash syntax for yaml arrays:

# instead of these
b_things: [small_thing, big_thing, other_thing]
c_things: [
  small_thing,
  big_thing,
  other_thing,
]

# this is preferred
a_things:
  - small_thing
  - big_thing
  - other_thing
  • If in doubt, bundle exec rake reformat_yaml['lib/path/to/file.yml']

Tips

  • Use the rake console task to start a session with Faker loaded.
  • Use bundle exec yard server -r to launch the YARD Doc server