Cucumber formatter for printing unused steps alongside progress

unused_progress.rb

# Copyright (c) 2010, Nathaniel Ritmeyer. All rights reserved.
#
# http://www.natontesting.com
#
# Save this in a file called 'unused_progress.rb' in your 'features/support' directory. Then, to list
# all the unused steps in your project, run the following command:
#
#   cucumber -d -f Cucumber::Formatter::UnusedProgress
#
# or...
#
#   cucumber -d -f UnusedProgress

require 'cucumber/formatter/stepdefs'

class UnusedProgress < Cucumber::Formatter::Stepdefs
  def print_summary(features)
    # print what progress normally prints
    print_steps(:pending)
    print_steps(:failed)
    print_stats(features, @options)
    print_snippets(@options)
    print_passing_wip(@options)

    # print unused steps only if we ran all features
    if @options[:paths] == ["features"]
      add_unused_stepdefs
      keys = @stepdef_to_match.keys.sort {|a,b| a.regexp_source <=> b.regexp_source}
      keys = keys.delete_if{|key| !@stepdef_to_match[key].none?}

      unless keys.empty?
        puts "The following steps are unused:\n"
        keys.each do |stepdef_key|
          puts "#{stepdef_key.regexp_source}\n#{stepdef_key.file_colon_line}\n"
        end
        puts
      end
    end
  end
end