text: // to run: 
  //   ./mongo jstests/ref.js
  
  db.otherthings.drop();
  db.things.drop();
  
  var other = { s : "other thing", n : 1};
  db.otherthings.save(other);
  
  db.things.save( { name : "abc" } );
  x = db.things.findOne();
  x.o = new DBPointer( "otherthings" , other._id );
  db.things.save(x);
  
  assert( db.things.findOne().o.fetch().n == 1, "dbref broken 2" );
  
  other.n++;
  db.otherthings.save(other);
  assert( db.things.findOne().o.fetch().n == 2, "dbrefs broken" );
  
  db.getSiblingDB("otherdb").dropDatabase();
  var objid = new ObjectId();
  db.getSiblingDB("otherdb").getCollection("othercoll").insert({_id:objid, field:"value"});
  var subdoc = db.getSiblingDB("otherdb").getCollection("othercoll").findOne({_id:objid});
  
  db.mycoll.drop();
  db.mycoll.insert({_id:"asdf", asdf:new DBRef("othercoll", objid, "otherdb")});
  var doc = db.mycoll.findOne({_id:"asdf"}, {_id:0, asdf:1});
  assert.eq(tojson(doc.asdf.fetch()), tojson(subdoc), "otherdb dbref");
  