Add tests for plugin sanity check.

2 files changed, 3 insertions, 3 deletions

diff --git a/railties/lib/rails/engine/configurable.rb b/railties/lib/rails/engine/configurable.rb
index d4b7ecc532..9a370f0abb 100644
--- a/railties/lib/rails/engine/configurable.rb
+++ b/railties/lib/rails/engine/configurable.rb
@@ -3,10 +3,11 @@ module Rails
     module Configurable
       def self.included(base)
         base.extend ClassMethods
-        base.delegate :middleware, :root, :paths, :to => :config
       end
 
       module ClassMethods
+        delegate :middleware, :root, :paths, :to => :config
+
         def config
           @config ||= Engine::Configuration.new(find_root_with_flag("lib"))
         end
diff --git a/railties/lib/rails/plugin.rb b/railties/lib/rails/plugin.rb
index b47679d140..4c73809177 100644
--- a/railties/lib/rails/plugin.rb
+++ b/railties/lib/rails/plugin.rb
@@ -49,10 +49,9 @@ module Rails
       eval(File.read(file), binding, file) if file && File.file?(file)
     end
 
-    # TODO Write tests for this sanity check
     initializer :sanity_check_railties_collision do
       if Engine.subclasses.map { |k| k.root.to_s }.include?(root.to_s)
-        raise "The plugin #{name.inspect} is a Railtie or an Engine and cannot be installed as Plugin"
+        raise "\"#{name}\" is a Railtie/Engine and cannot be installed as plugin"
       end
     end
   end