set the error callback to a nice default in case nobody set an error callback and an error happens

1 files changed, 7 insertions, 0 deletions

diff --git a/actionpack/test/controller/live_stream_test.rb b/actionpack/test/controller/live_stream_test.rb
index fb6a750089..934915fc5b 100644
--- a/actionpack/test/controller/live_stream_test.rb
+++ b/actionpack/test/controller/live_stream_test.rb
@@ -313,4 +313,11 @@ module ActionController
       assert_equal 304, @response.status.to_i
     end
   end
+
+  class BufferTest < ActionController::TestCase
+    def test_nil_callback
+      buf = ActionController::Live::Buffer.new nil
+      assert buf.call_on_error
+    end
+  end
 end