public function testDirtyTimestamp()
{
$sql_time = '2016-10-25 11:44:08';
$a = ['types' => [['date' => $sql_time]]];
$this->setDB($a);
$db = new Persistence_SQL($this->db->connection);
$m = new Model($db, ['table' => 'types']);
$m->addField('ts', ['actual' => 'date', 'type' => 'datetime']);
$m->loadAny();
$m['ts'] = clone $m['ts'];
$this->assertFalse($m->isDirty('ts'));
}