public function testGettersAndSetters()
 {
     $entity = new Revision();
     $this->assertLessThanOrEqual(new \DateTime(), $entity->getTimestamp());
     $userClass = \ZF\Doctrine\Audit\Module::getModuleOptions()->getUserEntityClassName();
     $user = new $userClass();
     $this->assertEquals($entity, $entity->setUser($user));
     $this->assertEquals($user, $entity->getUser());
     $entity->setComment('Test revision entity setter and getter');
     $this->assertEquals('Test revision entity setter and getter', $entity->getComment());
 }