func startTopologyClient(t *testing.T, g *graph.Graph, onReady func(*websocket.Conn), onChange func(*websocket.Conn)) error {
// ready when got a first ping
ws, err := connectToAgent(5, onReady)
if err != nil {
return err
}
for {
_, m, err := ws.ReadMessage()
if err != nil {
break
}
err = processGraphMessage(g, m)
if err != nil {
return err
}
logging.GetLogger().Debug("%s", string(m))
logging.GetLogger().Debug("%s", g.String())
onChange(ws)
}
return nil
}
