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rails--rails/activesupport/test/subscriber_test.rb

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# frozen_string_literal: true
require_relative "abstract_unit"
require "active_support/subscriber"
class TestSubscriber < ActiveSupport::Subscriber
cattr_reader :events
def self.clear
@@events = []
end
def open_party(event)
events << event
end
def another_open_party(event)
events << event
end
private
def private_party(event)
events << event
end
end
class PartySubscriber < TestSubscriber
def another_open_party(event)
event.payload["processing_class"] = self.class
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
TestSubscriber.attach_to :doodle
ActiveSupport::Notifications.instrument("open_party.doodle")
assert_equal "open_party.doodle", TestSubscriber.events.first.name
ensure
TestSubscriber.detach_from :doodle
end
def test_attaches_subscribers_with_inherit_all_option
PartySubscriber.attach_to :doodle, inherit_all: true
ActiveSupport::Notifications.instrument("open_party.doodle")
assert_equal "open_party.doodle", PartySubscriber.events.first.name
ensure
PartySubscriber.detach_from :doodle
end
def test_attaches_subscribers_with_inherit_all_option_replaces_original_behaviour
PartySubscriber.attach_to :doodle, inherit_all: true
ActiveSupport::Notifications.instrument("another_open_party.doodle")
assert_equal 1, PartySubscriber.events.size
event = PartySubscriber.events.first
assert_equal "another_open_party.doodle", event.name
assert_equal PartySubscriber, event.payload.fetch("processing_class")
ensure
PartySubscriber.detach_from :doodle
end
def test_attaches_only_one_subscriber
TestSubscriber.attach_to :doodle
ActiveSupport::Notifications.instrument("open_party.doodle")
assert_equal 1, TestSubscriber.events.size
ensure
TestSubscriber.detach_from :doodle
end
def test_does_not_attach_private_methods
TestSubscriber.attach_to :doodle
ActiveSupport::Notifications.instrument("private_party.doodle")
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assert_equal [], TestSubscriber.events
ensure
TestSubscriber.detach_from :doodle
end
def test_detaches_subscribers
TestSubscriber.attach_to :doodle
TestSubscriber.detach_from :doodle
ActiveSupport::Notifications.instrument("open_party.doodle")
assert_equal [], TestSubscriber.events
end
def test_detaches_subscribers_from_inherited_methods
PartySubscriber.attach_to :doodle
PartySubscriber.detach_from :doodle
ActiveSupport::Notifications.instrument("open_party.doodle")
assert_equal [], TestSubscriber.events
end
end