text: /* test indexing where the key is an embedded object.
   */
  
  t = db.embeddedIndexTest2;
  
  t.drop();
  assert(t.findOne() == null);
  
  o = {
      name: "foo",
      z: {a: 17}
  };
  p = {
      name: "foo",
      z: {a: 17}
  };
  q = {
      name: "barrr",
      z: {a: 18}
  };
  r = {
      name: "barrr",
      z: {k: "zzz", L: [1, 2]}
  };
  
  t.save(o);
  
  assert(t.findOne().z.a == 17);
  
  t.save(p);
  t.save(q);
  
  assert(t.findOne({z: {a: 17}}).z.a == 17);
  assert(t.find({z: {a: 17}}).length() == 2);
  assert(t.find({z: {a: 18}}).length() == 1);
  
  t.save(r);
  
  assert(t.findOne({z: {a: 17}}).z.a == 17);
  assert(t.find({z: {a: 17}}).length() == 2);
  assert(t.find({z: {a: 18}}).length() == 1);
  
  t.ensureIndex({z: 1});
  
  assert(t.findOne({z: {a: 17}}).z.a == 17);
  assert(t.find({z: {a: 17}}).length() == 2);
  assert(t.find({z: {a: 18}}).length() == 1);
  
  assert(t.find().sort({z: 1}).length() == 4);
  assert(t.find().sort({z: -1}).length() == 4);
  
  assert(t.validate().valid);
  