Pull generated methods up in to the anonymous subclass

Then we don't need the extra module.

actionpack/lib/action_dispatch/middleware/debug_view.rb

@@ -9,11 +9,6 @@ module ActionDispatch
   class DebugView < ActionView::Base # :nodoc:
     RESCUES_TEMPLATE_PATH = File.expand_path("templates", __dir__)
 
-    module CompiledTemplates
-    end
-
-    include CompiledTemplates
-
     def initialize(assigns)
       paths = [RESCUES_TEMPLATE_PATH]
       renderer = ActionView::Renderer.new ActionView::LookupContext.new(paths)
@@ -21,7 +16,7 @@ def initialize(assigns)
     end
 
     def compiled_method_container
-      CompiledTemplates
+      self.class
     end
 
     def debug_params(params)

actionview/lib/action_view/base.rb

@@ -182,11 +182,12 @@ def xss_safe? #:nodoc:
       end
 
       def with_empty_template_cache # :nodoc:
-        template_container = Module.new
-        Class.new(self) {
-          include template_container
-          define_method(:compiled_method_container)           { template_container }
-          define_singleton_method(:compiled_method_container) { template_container }
+        subclass = Class.new(self) {
+          # We can't implement these as self.class because subclasses will
+          # share the same template cache as superclasses, so "changed?" won't work
+          # correctly.
+          define_method(:compiled_method_container)           { subclass }
+          define_singleton_method(:compiled_method_container) { subclass }
         }
       end
 

actionview/test/template/render_test.rb

@@ -19,15 +19,8 @@ def combined_fragment_cache_key(key)
     end.with_view_paths(paths, @assigns)
 
     controller = TestController.new
-    view = @view
 
-    @controller_view = Class.new(controller.view_context_class) do
-      include view.compiled_method_container
-
-      define_method(:compiled_method_container) do
-        view.compiled_method_container
-      end
-    end.new(controller.view_renderer, controller.view_assigns, controller)
+    @controller_view = controller.view_context_class.with_empty_template_cache.new(controller.view_renderer, controller.view_assigns, controller)
 
     # Reload and register danish language for testing
     I18n.backend.store_translations "da", {}