Fixing inheritance of callbacks

Since callbacks share the same names they wouldn't be inherited.
I added a check to allow them to be inherited.

lib/factory_girl/factory.rb

@@ -351,7 +351,7 @@ def factory_name_for (class_or_to_s)
   end
 
   def attribute_defined? (name)
-    !@attributes.detect {|attr| attr.name == name }.nil?
+    !@attributes.detect {|attr| attr.name == name && !attr.is_a?(Factory::Attribute::Callback) }.nil?
   end
 
   def assert_valid_options(options)

spec/factory_girl/factory_spec.rb

@@ -458,6 +458,20 @@ class Other; end
       child.attributes.size.should == 1
       child.attributes.first.should be_kind_of(Factory::Attribute::Dynamic)
     end
+
+    it "inherit all callbacks" do
+      Factory.define(:child, :parent => :object) do |f|
+        f.after_stub {|o| o.name = 'Stubby' }
+      end
+
+      grandchild = Factory.define(:grandchild, :parent => :child) do |f|
+        f.after_stub {|o| o.name = "#{o.name} McStubby" }
+      end
+
+      grandchild.attributes.size.should == 3
+      grandchild.attributes.first.should be_kind_of(Factory::Attribute::Callback)
+      grandchild.attributes[1].should be_kind_of(Factory::Attribute::Callback)
+    end
   end
 
   describe 'defining a factory with a default strategy parameter' do

spec/factory_girl/proxy/stub_spec.rb

@@ -46,11 +46,11 @@
     end
 
     describe "when asked for the result" do
-      it "should return the actual instance when asked for the result" do
+      it "should return the actual instance" do
         @stub.result.should == @instance
       end
 
-      it "should run the :after_stub callback when asked for the result" do
+      it "should run the :after_stub callback" do
         @spy = Object.new
         stub(@spy).foo
         @stub.add_callback(:after_stub, proc{ @spy.foo })

spec/integration_spec.rb

@@ -37,6 +37,10 @@
       f.after_create {|u| u.last_name  = 'Createy' }
     end
 
+    Factory.define :user_with_inherited_callbacks, :parent => :user_with_callbacks do |f|
+      f.callback(:after_stub) {|u| u.last_name = 'Double-Stubby' }
+    end
+
     Factory.define :business do |f|
       f.name 'Supplier of Awesome'
       f.association :owner, :factory => :user
@@ -290,5 +294,11 @@
       @user.first_name.should == 'Buildy'
       @user.last_name.should == 'Createy'
     end
+
+    it "should run both the after_stub callback on the factory and the inherited after_stub callback" do
+      @user = Factory.stub(:user_with_inherited_callbacks)
+      @user.first_name.should == 'Stubby'
+      @user.last_name.should == 'Double-Stubby'
+    end
   end
 end