Add decorated? method

lib/draper/decoratable.rb

@@ -20,6 +20,10 @@ module Draper::Decoratable
     false
   end
 
+  def decorated?
+    false
+  end
+
   module ClassMethods
     def decorate(options = {})
       decorator_proxy = decorator_class.decorate(self.scoped, options)

lib/draper/decorator.rb

@@ -187,6 +187,10 @@ module Draper
       applied_decorators.include?(decorator_class)
     end
 
+    def decorated?
+      true
+    end
+
     # Delegates == to the decorated models
     #
     # @return [Boolean] true if other's model == self's model

spec/draper/decoratable_spec.rb

@@ -29,6 +29,12 @@ describe Draper::Decoratable do
     end
   end
 
+  describe "#decorated?" do
+    it "returns false" do
+      subject.should_not be_decorated
+    end
+  end
+
   describe Draper::Decoratable::ClassMethods do
     shared_examples_for "a call to Draper::Decoratable::ClassMethods#decorate" do
       subject { klass.limit }

spec/draper/decorator_spec.rb

@@ -284,6 +284,12 @@ describe Draper::Decorator do
     end
   end
 
+  describe "#decorated?" do
+    it "returns true" do
+      subject.should be_decorated
+    end
+  end
+
   context(".wrapped_object") do
     it "return the wrapped object" do
       subject.wrapped_object.should == source