Turn shoulda formatted tests into traditional test-unit format

test-unitfy.rb

#!/usr/bin/env ruby

banner = <<-USAGE

  Turn shoulda formatted tests into traditional test-unit format
  
  Edit in place:
  find test -name '*_test.rb' | xargs ruby -p -i.bak test-unitfy.rb
  
  Preview:
  ruby -p test-unitfy.rb test/unit/foo_test.rb

USAGE

unless $_
  puts banner
  exit(1) 
end

require 'active_support/inflector'

TEST_REGEX   ||= /(\s*)test "(.*?)" do/
DESC_REGEX   ||= /^context "(.+?)" do/
REQ_STR      ||= "require File.expand_path('../../../test_helper', __FILE__)"

def methodify(s)
  s.gsub(/\s/, '_').downcase
end

case $_
when TEST_REGEX  # no captures unless this is done
  $_.gsub!(TEST_REGEX, "  def test_#{methodify($2)}")
when DESC_REGEX
  replacement = $1.classify + "Test"
  $_.gsub!(DESC_REGEX, "class #{replacement} < Test::Unit::TestCase")
else
  $_.gsub!(REQ_STR, 'require "test_helper"')
end