Add similar methods to Decoratable

lib/draper/decoratable.rb

@@ -12,6 +12,14 @@ def decorator_class
 
   alias :decorate :decorator
 
+  def applied_decorators
+    []
+  end
+
+  def decorated_with?(decorator_class)
+    false
+  end
+
   module ClassMethods
     def decorate(options = {})
       decorator_proxy = decorator_class.decorate(self.scoped, options)
@@ -22,4 +30,4 @@ def decorator_class
       "#{model_name}Decorator".constantize
     end
   end
-end
+end

spec/draper/decoratable_spec.rb

@@ -17,6 +17,18 @@
     end
   end
 
+  describe "#applied_decorators" do
+    it "returns an empty list" do
+      subject.applied_decorators.should be_empty
+    end
+  end
+
+  describe "#decorated_with?" do
+    it "returns false" do
+      subject.should_not be_decorated_with(ProductDecorator)
+    end
+  end
+
   describe Draper::Decoratable::ClassMethods do
     shared_examples_for "a call to Draper::Decoratable::ClassMethods#decorate" do
       subject { klass.limit }