Add method for an issue to know whether it is being closed

app/models/issue.rb

@@ -64,6 +64,10 @@ class Issue < ActiveRecord::Base
   def is_being_reassigned?
     assignee_id_changed?
   end
+
+  def is_being_closed?
+    closed_changed? && closed
+  end
 end
 # == Schema Information
 #

app/models/issue_observer.rb

@@ -7,6 +7,7 @@ class IssueObserver < ActiveRecord::Observer
 
   def after_change(issue)
     send_reassigned_email(issue) if issue.is_being_reassigned?
+    Note.create_status_change_note(issue, current_user, 'closed') if issue.is_being_closed?
   end
 
   def send_reassigned_email(issue)
@@ -16,5 +17,4 @@ class IssueObserver < ActiveRecord::Observer
       Notify.reassigned_issue_email(recipient_id, issue.id, issue.assignee_id_was)
     end
   end
-
 end

spec/models/issue_observer_spec.rb

@@ -26,14 +26,20 @@ describe IssueObserver do
   end
 
   context 'when an issue is changed' do
-    it 'sends a reassigned email, if the issue is being reassigned' do
+    before(:each) do
+      issue.stub(:is_being_reassigned?).and_return(false)
+      issue.stub(:is_being_closed?).and_return(false)
+    end
+
+    context 'a reassigned email' do
+      it 'is sent if the issue is being reassigned' do
         issue.should_receive(:is_being_reassigned?).and_return(true)
         subject.should_receive(:send_reassigned_email).with(issue)
 
         subject.after_change(issue)
       end
 
-    it 'does not send a reassigned email, if the issue was not reassigned' do
+      it 'is not sent if the issue is not being reassigned' do
         issue.should_receive(:is_being_reassigned?).and_return(false)
         subject.should_not_receive(:send_reassigned_email)
 
@@ -41,6 +47,23 @@ describe IssueObserver do
       end
     end
 
+    context 'a status "closed" note' do
+      it 'is created if the issue is being closed' do
+        issue.should_receive(:is_being_closed?).and_return(true)
+        Note.should_receive(:create_status_change_note).with(issue, some_user, 'closed')
+
+        subject.after_change(issue)
+      end
+
+      it 'is not created if the issue is not being closed' do
+        issue.should_receive(:is_being_closed?).and_return(false)
+        Note.should_not_receive(:create_status_change_note).with(issue, some_user, 'closed')
+
+        subject.after_change(issue)
+      end
+    end
+  end
+
   describe '#send_reassigned_email' do
     let(:previous_assignee) { double(:user, :id => 3) }
 

spec/models/issue_spec.rb

@@ -36,6 +36,25 @@ describe Issue do
     end
   end
 
+  describe '#is_being_closed?' do
+    it 'returns true if the closed attribute has changed and is now true' do
+      subject.closed = true
+      subject.is_being_closed?.should be_true
+    end
+    it 'returns false if the closed attribute has changed and is now false' do
+      issue = Factory.create(:issue,
+                             :closed => true,
+                             :author => Factory(:user),
+                             :assignee => Factory(:user),
+                             :project => Factory.create(:project))
+      issue.closed = false
+      issue.is_being_closed?.should be_false
+    end
+    it 'returns false if the closed attribute has not changed' do
+      subject.is_being_closed?.should be_false
+    end
+  end
+
   describe "plus 1" do
     let(:project) { Factory(:project) }
     subject {