1 files changed, 8 insertions, 0 deletions
diff --git a/actionpack/test/template/sprockets_helper_test.rb b/actionpack/test/template/sprockets_helper_test.rb
index 26a504beb8..64fdd53e73 100644
--- a/actionpack/test/template/sprockets_helper_test.rb
+++ b/actionpack/test/template/sprockets_helper_test.rb
@@ -41,6 +41,10 @@ class SprocketsHelperTest < ActionView::TestCase
     @controller ? @controller.config : @config
   end
 
+  def compute_host(source, request, options = {})
+    raise "Should never get here"
+  end
+
   test "asset_path" do
     assert_match %r{/assets/logo-[0-9a-f]+.png},
       asset_path("logo.png")
@@ -125,6 +129,10 @@ class SprocketsHelperTest < ActionView::TestCase
     assert_raises ActionController::RoutingError do
       asset_path("logo.png")
     end
+    @config.asset_host = method :compute_host
+    assert_raises ActionController::RoutingError do
+      asset_path("logo.png")
+    end
   end
 
   test "image_tag" do