require "abstract_unit" require "active_support/subscriber" class TestSubscriber < ActiveSupport::Subscriber attach_to :doodle cattr_reader :events def self.clear @@events = [] end def open_party(event) events << event end private def private_party(event) events << event end end # Monkey patch subscriber to test that only one subscriber per method is added. class TestSubscriber remove_method :open_party def open_party(event) events << event end end class SubscriberTest < ActiveSupport::TestCase def setup TestSubscriber.clear end def test_attaches_subscribers ActiveSupport::Notifications.instrument("open_party.doodle") assert_equal "open_party.doodle", TestSubscriber.events.first.name end def test_attaches_only_one_subscriber ActiveSupport::Notifications.instrument("open_party.doodle") assert_equal 1, TestSubscriber.events.size end def test_does_not_attach_private_methods ActiveSupport::Notifications.instrument("private_party.doodle") assert_equal [], TestSubscriber.events end end