le(t *testing.T) {  nodes, err := connectedTestNodes(0, 0)  defer tearDownNodes(nodes)  if err != nil {   t.Fatalf("connectedTestNodes(0, 0) failed: %v", err)  }   n0 := nodes[0]  peers := n0.ring.replicaPeers(n0.name)  if len(peers) != 0 {   t.Errorf("replicaPeers(%v) should have one element: %v", 