public function testMoveToPosition()
{
$item1 = new SortableItem();
$item1->save();
$item2 = new SortableItem();
$item2->save();
$item3 = new SortableItem();
$item3->save();
$item4 = new SortableItem();
$item4->save();
$item5 = new SortableItem();
$item5->save();
$new_position = $item1->position;
$item5->moveToPosition($new_position);
$this->assertEqual($item5->position, $new_position);
$this->assertEqual($item1->refresh()->position, $new_position + 1);
$new_position = $item4->refresh()->position;
$item2->moveToPosition($new_position);
$this->assertEqual($item2->refresh()->position, $new_position);
$this->assertEqual($item4->refresh()->position, $new_position - 1);
}
