1 files changed, 21 insertions, 0 deletions
diff --git a/activesupport/test/notifications_test.rb b/activesupport/test/notifications_test.rb
index c9c63680e4..08277e5436 100644
--- a/activesupport/test/notifications_test.rb
+++ b/activesupport/test/notifications_test.rb
@@ -41,6 +41,27 @@ module Notifications
       assert_operator event.duration, :>, 0
     end
 
+    def test_subscribe_to_events_where_payload_is_changed_during_instrumentation
+      @notifier.subscribe do |event|
+        assert_equal "success!", event.payload[:my_key]
+      end
+
+      ActiveSupport::Notifications.instrument("foo") do |payload|
+        payload[:my_key] = "success!"
+      end
+    end
+
+    def test_subscribe_to_events_can_handle_nested_hashes_in_the_paylaod
+      @notifier.subscribe do |event|
+        assert_equal "success!", event.payload[:some_key][:key_one]
+        assert_equal "great_success!", event.payload[:some_key][:key_two]
+      end
+
+      ActiveSupport::Notifications.instrument("foo", some_key: { key_one: "success!" }) do |payload|
+        payload[:some_key][:key_two] = "great_success!"
+      end
+    end
+
     def test_subscribe_via_top_level_api
       old_notifier = ActiveSupport::Notifications.notifier
       ActiveSupport::Notifications.notifier = ActiveSupport::Notifications::Fanout.new