package testrpc import ( "testing" "github.com/hashicorp/consul/consul/structs" "github.com/hashicorp/consul/testutil/retry" ) type rpcFn func(string, interface{}, interface{}) error func WaitForLeader(t *testing.T, rpc rpcFn, dc string) { var out structs.IndexedNodes retry.Run(t, func(r *retry.R) { // Ensure we have a leader and a node registration. args := &structs.DCSpecificRequest{Datacenter: dc} if err := rpc("Catalog.ListNodes", args, &out); err != nil { r.Fatalf("Catalog.ListNodes failed: %v", err) } if !out.QueryMeta.KnownLeader { r.Fatalf("No leader") } if out.Index == 0 { r.Fatalf("Consul index is 0") } }) }