boolianize.rb

require 'active_support/core_ext'
require 'minitest/unit'

String.instance_eval do
  define_method :method_missing do |method, *args|
    ActiveSupport::StringInquirer.new(self).send(method)
  end
end

Symbol.instance_eval do
  define_method :method_missing do |method, *args|
    ActiveSupport::StringInquirer.new(self.to_s).send(method)
  end
end

class TestString < MiniTest::Unit::TestCase
  def test_boolianize
    assert "foo".foo?
  end
end

class TestSymbol < MiniTest::Unit::TestCase
  def test_boolianize
    assert :foo.foo?
  end
end

if __FILE__ == $0
  MiniTest::Unit.autorun
end