function testUpdateWhileNoDirtyFields()
{
$object = new TestOneTableObject();
$object->setAnnotation($initial_annotation = 'some annotation');
$object->setContent($initial_content = 'some content');
$object->save();
$object->setAnnotation('some other annotation');
$object->setContent('some other content');
$object->resetPropertyDirtiness('content');
$object->resetPropertyDirtiness('annotation');
$object->save();
$loaded_object = lmbActiveRecord::findById('TestOneTableObject', $object->getId());
$this->assertEqual($loaded_object->getAnnotation(), $initial_annotation);
$this->assertEqual($loaded_object->getContent(), $initial_content);
}