Add ability to create factory from attr_group

lib/factory_girl/definition_proxy.rb

@@ -154,7 +154,8 @@ module FactoryGirl
       @child_factories << [name, options, block]
     end
     
-    def attr_group(name, &block)
+    def attr_group(name, options={}, &block)
+      factory(name, &block) if options.delete(:factory)
       @factory.define_attribute_group(AttributeGroup.new(name, &block))
     end
   end

spec/acceptance/attribute_groups_spec.rb

@@ -9,7 +9,7 @@ describe "an instance generated by a factory with multiple attribute groups" do
       factory :user do
         name "John"
 
-        attr_group :admin do
+        attr_group :admin, :factory=>true do
           admin true
         end
 
@@ -23,7 +23,6 @@ describe "an instance generated by a factory with multiple attribute groups" do
           gender "Female"
         end
 
-        factory :admin, :attr_groups => [:admin]
         factory :male, :attr_groups => [:male]
         factory :female, :attr_groups => [:female] do
           attr_group :admin do
@@ -113,4 +112,9 @@ describe "an instance generated by a factory with multiple attribute groups" do
     its(:name) { should == "Bill" }
     its(:email) { should == "Bill@example.com"}
   end
+  
+  context "factory created from attribute group" do
+    subject { FactoryGirl.create(:admin) }
+    it { should be_admin }
+  end
 end