require 'abstract_unit' require 'action_mailer/adv_attr_accessor' class AdvAttrTest < ActiveSupport::TestCase class Person cattr_reader :protected_instance_variables @@protected_instance_variables = [] extend ActionMailer::AdvAttrAccessor adv_attr_accessor :name end def setup @person = Person.new end def test_adv_attr assert_nil @person.name @person.name 'Bob' assert_equal 'Bob', @person.name end def test_adv_attr_writer assert_nil @person.name @person.name = 'Bob' assert_equal 'Bob', @person.name end def test_raise_an_error_with_multiple_args assert_raise(ArgumentError) { @person.name('x', 'y') } end def test_ivar_is_added_to_protected_instnace_variables assert Person.protected_instance_variables.include?('@name') end end