public function testNumAttachments()
{
$item = new Zotero_Item();
$item->libraryID = self::$config['userLibraryID'];
$item->itemTypeID = Zotero_ItemTypes::getID("book");
$item->save();
$this->assertEquals(0, $item->numAttachments());
$attachmentItem = new Zotero_Item();
$attachmentItem->libraryID = self::$config['userLibraryID'];
$attachmentItem->itemTypeID = Zotero_ItemTypes::getID("attachment");
$attachmentItem->setSource($item->id);
$attachmentItem->save();
$this->assertEquals(1, $item->numAttachments());
}
