public async Task SessionStateSeralizationTest()
{
var sessionState = new SessionState(false);
sessionState.AddOrUpdateSubscription(MethodPostTopicPrefix, QualityOfService.AtLeastOnce);
sessionState.RemoveSubscription(TwinSubscriptionTopicPrefix);
Assert.True(sessionState.SubscriptionRegistrations.ContainsKey(MethodPostTopicPrefix));
Assert.True(sessionState.SubscriptionRegistrations.ContainsKey(TwinSubscriptionTopicPrefix));
Assert.True(sessionState.SubscriptionRegistrations[MethodPostTopicPrefix]);
Assert.False(sessionState.SubscriptionRegistrations[TwinSubscriptionTopicPrefix]);
IEntityStore <string, SessionState> entityStore = new StoreProvider(new InMemoryDbStoreProvider()).GetEntityStore <string, SessionState>(Constants.SessionStorePartitionKey);
string key = Guid.NewGuid().ToString();
await entityStore.Put(key, sessionState);
Option <SessionState> retrievedSessionStateOption = await entityStore.Get(key);
Assert.True(retrievedSessionStateOption.HasValue);
SessionState retrievedSessionState = retrievedSessionStateOption.OrDefault();
Assert.NotNull(retrievedSessionState);
Assert.NotNull(retrievedSessionState.Subscriptions);
Assert.NotNull(retrievedSessionState.Subscriptions.FirstOrDefault(s => s.TopicFilter == MethodPostTopicPrefix));
Assert.True(retrievedSessionState.SubscriptionRegistrations.ContainsKey(MethodPostTopicPrefix));
Assert.True(retrievedSessionState.SubscriptionRegistrations.ContainsKey(TwinSubscriptionTopicPrefix));
Assert.True(retrievedSessionState.SubscriptionRegistrations[MethodPostTopicPrefix]);
Assert.False(retrievedSessionState.SubscriptionRegistrations[TwinSubscriptionTopicPrefix]);
}