Fix factory named camel case string

lib/factory_girl/factory.rb

@@ -8,7 +8,7 @@ module FactoryGirl
 
     def initialize(name, options = {})
       assert_valid_options(options)
-      @name             = name.is_a?(Symbol) ? name : name.to_s.underscore.to_sym
+      @name             = name.respond_to?(:to_sym) ? name.to_sym : name.to_s.underscore.to_sym
       @parent           = options[:parent]
       @aliases          = options[:aliases] || []
       @class_name       = options[:class]

spec/acceptance/definition_camel_string_spec.rb

@@ -0,0 +1,15 @@
+require 'spec_helper'
+
+describe "an instance generated by a factory named a camel case string " do
+  before do
+    define_model("UserModel")
+
+    FactoryGirl.define do
+      factory 'UserModel', class: UserModel
+    end
+  end
+
+  it "registers the UserModel factory" do
+    expect(FactoryGirl.factory_by_name('UserModel')).to be_a(FactoryGirl::Factory)
+  end
+end