Allow attaching to AS::Notifications namespace up front

Before, you were required to attach *after* adding the methods to the
class, since the attachment process needed the methods to be present.

With this change, any new method will also be attached to the configured
namespace.

1 files changed, 40 insertions, 0 deletions

diff --git a/activesupport/test/subscriber_test.rb b/activesupport/test/subscriber_test.rb
new file mode 100644
index 0000000000..253411aa3d
--- /dev/null
+++ b/activesupport/test/subscriber_test.rb
@@ -0,0 +1,40 @@
+require 'abstract_unit'
+require 'active_support/subscriber'
+
+class TestSubscriber < ActiveSupport::Subscriber
+  attach_to :doodle
+
+  cattr_reader :event
+
+  def self.clear
+    @@event = nil
+  end
+
+  def open_party(event)
+    @@event = event
+  end
+
+  private
+
+  def private_party(event)
+    @@event = 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.event.name
+  end
+
+  def test_does_not_attach_private_methods
+    ActiveSupport::Notifications.instrument("private_party.doodle")
+
+    assert_nil TestSubscriber.event
+  end
+end