Ensure ActionView::Helpers::AssetTagHelper::AssetTag::Cache is cleared before loading so changes to asset files are picked up by the broswer [#1233 state:resolved]

Signed-off-by: Joshua Peek <josh@joshpeek.com>

actionpack/lib/action_controller/dispatcher.rb

@@ -39,7 +39,7 @@ module ActionController
       # Add a preparation callback. Preparation callbacks are run before every
       # request in development mode, and before the first request in production
       # mode.
-      # 
+      #
       # An optional identifier may be supplied for the callback. If provided,
       # to_prepare may be called again with the same identifier to replace the
       # existing callback. Passing an identifier is a suggested practice if the
@@ -144,6 +144,7 @@ module ActionController
 
       Routing::Routes.reload
       ActionController::Base.view_paths.reload!
+      ActionView::Helpers::AssetTagHelper::AssetTag::Cache.clear
     end
 
     # Cleanup the application by clearing out loaded classes so they can

actionpack/test/controller/dispatcher_test.rb

@@ -26,9 +26,17 @@ class DispatcherTest < Test::Unit::TestCase
   end
 
   def test_clears_dependencies_after_dispatch_if_in_loading_mode
-    ActionController::Routing::Routes.expects(:reload).once
     ActiveSupport::Dependencies.expects(:clear).once
+    dispatch(@output, false)
+  end
 
+  def test_reloads_routes_before_dispatch_if_in_loading_mode
+    ActionController::Routing::Routes.expects(:reload).once
+    dispatch(@output, false)
+  end
+
+  def test_clears_asset_tag_cache_before_dispatch_if_in_loading_mode
+    ActionView::Helpers::AssetTagHelper::AssetTag::Cache.expects(:clear).once
     dispatch(@output, false)
   end