added specs for :after_commit hook

spec/models/validator.rb

@@ -4,13 +4,26 @@ class Validator < ActiveRecord::Base
   include AASM
   aasm :column => :status do
     state :sleeping, :initial => true
-    state :running
+    state :running, :after_commit => :change_name!
+    state :failed, :after_enter => :fail, :after_commit => :change_name!
     event :run do
       transitions :to => :running, :from => :sleeping
     end
     event :sleep do
       transitions :to => :sleeping, :from => :running
     end
+    event :fail do
+      transitions :to => :failed, :from => [:sleeping, :running]
+    end
   end
   validates_presence_of :name
+
+  def change_name!
+    self.name = "name changed"
+    save!
+  end
+
+  def fail
+    raise StandardError.new('failed on purpose')
+  end
 end

spec/unit/persistence/active_record_persistence_spec.rb

@@ -202,5 +202,22 @@ describe 'transitions with persistence' do
       transactor.should be_running
       worker.reload.status.should == 'sleeping'
     end
+
+    describe "after_commit callback" do
+      it "should fire :after_commit if transaction was successful" do
+        validator = Validator.create(:name => 'name')
+        validator.should be_sleeping
+        validator.run!
+        validator.should be_running
+        validator.name.should_not == "name"
+      end
+
+      it "should not fire :after_commit if transaction failed" do
+        validator = Validator.create(:name => 'name')
+        lambda { validator.fail! }.should raise_error(StandardError, 'failed on purpose')
+        validator.name.should == "name"
+      end
+
+    end
   end
 end