inflector_issue.rb

gem 'activesupport', '4.0.0'
require 'minitest/autorun'

require 'active_support/inflector'

class BugTest < MiniTest::Unit::TestCase
  def test_underscore_knows_about_acronyms_in_directories
    ActiveSupport::Inflector.inflections(:en) do |inflect|
      inflect.acronym 'OAuth'
    end

    assert_equal "oauth_thing", "OAuthThing".underscore # passes
    assert_equal "foo/oauth_thing", "Foo::OAuthThing".underscore # fails
  end
end