Expose private methods for testing. Can accept a block, or just call in RSpec before/after blocks

publicize_methods.rb

class Class
  def publicize_methods
    @_saved_private_instance_methods = self.private_instance_methods
    self.class_eval { public *@_saved_private_instance_methods }
    if block_given?
      yield
      reprivatize_methods
    end
  end

  def reprivatize_methods
    if @_saved_private_instance_methods
      self.class_eval { private *@_saved_private_instance_methods }
    end
  end
end