I'am trying to test persistence actor, but behavior is wierd.
My tested actor:
public class PredictionManager : ReceivePersistentActor
{
public override string PersistenceId => _persistanceId;
public PredictionManager(string persistenceId)
{
_persistanceId = persistenceId;
Command<AddPredictionRequest>(OnPrediction);
Recover<SnapshotOffer>(x => OnRecover((PredictionManagerState)x.Snapshot), x => x.Snapshot is PredictionManagerState);
}
private void OnPrediction(AddPredictionRequest request)
{
/* some code */
_state.Add(request);
SaveSnapshot(_state);
}
private void OnRecover(PredictionManagerState state)
{
foreach(var request in state.RequestMap)
{
OnPrediction(request.Value);
}
}
}
My state save all messages and deletes them after manager actor recieve some message. When I try to debug my test, Recover function called first and after this called OnPrediction. My question is - how it's possible? If data stores in momory, why it have SnapshotOffer? Also I have tried to generate new percistenceId from Guid.NewGuid() but it doesn't work.
public void AddPrediction_PassToChild_CreateNewManager_PassToChild()
{
var sender = CreateTestProbe(Sys);
var persistanceId = "AddPrediction_PassToChild_CreateNewManager_PassToChild";
var props = Props.Create(() => new PredictionManager(Mock.Of<IEventBus>(), persistanceId));
var predictionManager = ActorOf(props);
var message = new PredictionManager.AddPredictionRequest(Props.Create(() => new ChildTestActor(sender.Ref)),
new StartPrediction<IPredictionParameter>("a", 1, "a", new Param() ));
//Act
predictionManager.Tell(message, sender);
sender.ExpectMsg<string>(x => x == "ok", TimeSpan.FromSeconds(15));
Sys.Stop(predictionManager);
predictionManager = Sys.ActorOf(props);
sender.ExpectMsg<string>(x => x == "ok", TimeSpan.FromSeconds(15));
Sys.Stop(predictionManager);
}
