public function hasIdentifierReturnsTrueForRegisteredObject()
{
$session = new Persistence\Generic\Session();
$session->registerObject(new \stdClass(), 12345);
$this->assertTrue($session->hasIdentifier('12345'), 'Session claims it does not have registered object.');
$this->assertFalse($session->hasIdentifier('67890'), 'Session claims it does have unregistered object.');
}