Gem Version Build Status Dependency Status Code Climate Coverage Status

Yardstick is a tool that verifies documentation coverage of Ruby code. It will measure the source and provide feedback on what is missing from the documentation and what can be improved.


Yardstick may be used three ways:

1. Command-line Tool

This is the simplest way to run yardstick. Provide it a list of files and it will measure all of them and output suggestions for improvement, eg:

$ yardstick 'lib/**/*.rb' 'app/**/*.rb' ...etc...

2. Rake task

Yardstick may be integrated with existing Rakefile and build processes, and is especially useful when used with a continuous integration system. You can set thresholds, as well as check that the threshold matches the actual coverage, forcing you to bump it up if the actual coverage has increased. It uses a simple DSL to configure the task eg:

# measure coverage

require 'yardstick/rake/measurement'

Yardstick::Rake::Measurement.new(:yardstick_measure) do |measurement|
  measurement.output = 'measurement/report.txt'

# verify coverage

require 'yardstick/rake/verify'

Yardstick::Rake::Verify.new do |verify|
  verify.threshold = 100

3. Libraries

Yardstick comes with several libraries that will allow you to process lists of files, or String code fragments, eg:

require 'yardstick'

# measure a list of file paths
measurements = Yardstick.measure(paths)

# measure a code fragment
measurements = Yardstick.measure_string <<-RUBY
  # Displays the message provided to stdout
  # @param [#to_str] message
  #   the message to display
  # @return [undefined]
  # @api public
  def display(message)
    puts message.to_str

4. Configuration

Every rule in Yardstick can be turned off globally and locally. All rules are enabled and threshold is set to maximum by default (100%). If your documentation coverage is below or above this threshold then yardstick will exit with a nonzero status and print that fact.

Default configuration:


threshold: 100 rules: ApiTag::Presence: enabled: true exclude: [] ApiTag::Inclusion: enabled: true exclude: [] ApiTag::ProtectedMethod: enabled: true exclude: [] ApiTag::PrivateMethod: enabled: true exclude: [] ExampleTag: enabled: true exclude: [] ReturnTag: enabled: true exclude: [] Summary::Presence: enabled: true exclude: [] Summary::Length: enabled: true exclude: [] Summary::Delimiter: enabled: true exclude: [] Summary::SingleLine: enabled: true exclude: [] ```

To disable a rule for some part of the code use:

    enabled: true
      - Foo::Bar  # class or module
      - Foo#bar   # instance method
      - Foo.bar   # class method

Rake tasks take these options as a second argument:

options = YAML.load_file('config/yardstick.yml')

Yardstick::Rake::Verify.new(:verify_measurements, options)


See CONTRIBUTING.md for details.


Copyright (c) 2009-2013 Dan Kubb. See LICENSE for details.