scala mongo testing

package moduleupload

import com.mongodb.casbah.Imports._
import scalax.io._

object Transform {
   val mongoClient = MongoConnection()
   val db = mongoClient("test")
   val modules = db("test")

   def main(args: Array[String]) {
      val docs = modules find ("style" $exists false)
      val (failed, altered) = docs.partition(work)

      //apparently does nothing
      altered map {x =>
         println("map: ")
         println(x)
      }

      //prints the documents
      altered foreach {x =>
         println("foreach: ")
         println(x)
      }
   }

   def work(_item: DBObject): Boolean = {
      val item: MongoDBObject = _item;
      item.get("z").isEmpty
   }
}