1 files changed, 11 insertions, 1 deletions
diff --git a/activesupport/test/notifications_test.rb b/activesupport/test/notifications_test.rb
index 226e12ff75..3690d723fa 100644
--- a/activesupport/test/notifications_test.rb
+++ b/activesupport/test/notifications_test.rb
@@ -83,10 +83,20 @@ module Notifications
   end
 
   class InstrumentationTest < TestCase
-    delegate :instrument, :to => ActiveSupport::Notifications
+    delegate :instrument, :instrument!, :to => ActiveSupport::Notifications
 
     def test_instrument_returns_block_result
       assert_equal 2, instrument(:awesome) { 1 + 1 }
+      drain
+    end
+
+    def test_instrument_with_band_adds_result_to_payload
+      assert_equal 2, instrument!(:awesome) { 1 + 1 }
+      drain
+
+      assert_equal 1, @events.size
+      assert_equal :awesome, @events.first.name
+      assert_equal Hash[:result => 2], @events.first.payload
     end
 
     def test_instrumenter_exposes_its_id