Merge pull request #1798 from jeroenj/cachesweeper-fix

Fixes an issue where cache sweepers with only after filters would have no controller object

actionpack/lib/action_controller/caching/sweeping.rb

@@ -61,6 +61,7 @@ module ActionController #:nodoc:
         end
 
         def after(controller)
+          self.controller = controller
           callback(:after) if controller.perform_caching
           # Clean up, so that the controller can be collected after this request
           self.controller = nil

actionpack/test/controller/filters_test.rb

@@ -530,6 +530,11 @@ class FilterTest < ActionController::TestCase
     assert sweeper.before(TestController.new)
   end
 
+  def test_after_method_of_sweeper_should_always_return_nil
+    sweeper = ActionController::Caching::Sweeper.send(:new)
+    assert_nil sweeper.after(TestController.new)
+  end
+
   def test_non_yielding_around_filters_not_returning_false_do_not_raise
     controller = NonYieldingAroundFilterController.new
     controller.instance_variable_set "@filter_return_value", true