fix user feedback controller test

app/models/user_feedback.rb

@@ -3,14 +3,25 @@ class UserFeedback < ActiveRecord::Base
   belongs_to :user
   belongs_to :creator, :class_name => "User"
   before_validation :initialize_creator, :on => :create
-  attr_accessible :body, :user_id, :is_positive, :user_name
-  validates_presence_of :user, :creator, :body
+  attr_accessible :body, :user_id, :category, :user_name
+  validates_presence_of :user, :creator, :body, :category
   validate :creator_is_privileged
+  scope :positive, where("category = ?", "positive")
+  scope :neutral, where("category = ?", "neutral")
+  scope :negative, where("category = ?", "negative")
   
   def initialize_creator
     self.creator_id = CurrentUser.id
   end
   
+  def user_name
+    if user
+      user.name
+    else
+      nil
+    end
+  end
+  
   def user_name=(name)
     self.user_id = User.name_to_id(name)
   end