From 5e0c423881985abfcbeffa602ee0d15467e24bf7 Mon Sep 17 00:00:00 2001
From: Aaron Patterson <aaron.patterson@gmail.com>
Date: Thu, 26 Jul 2018 12:05:23 -0700
Subject: Subscribe to event objects via `subscribe`

---
 activesupport/test/notifications_test.rb | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/activesupport/test/notifications_test.rb b/activesupport/test/notifications_test.rb
index e28560d88b..119062d5bf 100644
--- a/activesupport/test/notifications_test.rb
+++ b/activesupport/test/notifications_test.rb
@@ -41,6 +41,18 @@ module Notifications
       assert_operator event.idle_time, :>, 0
       assert_operator event.duration, :>, 0
     end
+
+    def test_subscribe_via_subscribe_method
+      events = []
+      @notifier.subscribe do |event|
+        events << event
+      end
+
+      ActiveSupport::Notifications.instrument("foo")
+      event = events.first
+      assert event, "should have an event"
+      assert_operator event.allocations, :>, 0
+    end
   end
 
   class SubscribedTest < TestCase
-- 
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