Add new utility method for an issue to know whether it is being reassigned

app/models/issue.rb

@@ -55,6 +55,15 @@ class Issue < ActiveRecord::Base
   def new?
     today? && created_at == updated_at
   end
+
+  # Return the number of +1 comments (upvotes)
+  def upvotes
+    notes.select(&:upvote?).size
+  end
+
+  def is_being_reassigned?
+    assignee_id_changed?
+  end
 end
 # == Schema Information
 #

spec/models/issue_spec.rb

@@ -20,10 +20,21 @@ describe Issue do
     it { Issue.should respond_to :opened }
   end
 
-  it { Factory.create(:issue,
+  subject { Factory.create(:issue,
                            :author => Factory(:user),
                            :assignee => Factory(:user),
-                      :project => Factory.create(:project)).should be_valid }
+                           :project => Factory.create(:project)) }
+  it { should be_valid }
+
+  describe '#is_being_reassigned?' do
+    it 'returns true if the issue assignee has changed' do
+      subject.assignee = Factory(:user)
+      subject.is_being_reassigned?.should be_true
+    end
+    it 'returns false if the issue assignee has not changed' do
+      subject.is_being_reassigned?.should be_false
+    end
+  end
 
   describe "plus 1" do
     let(:project) { Factory(:project) }