RavenDB how to flush?

Question

I am using RavenDb embedded. As a part of my intergration tests I want to check objects are persisted. When I SaveChanges on an object, then retrieve it, it cannot be found

Answer 1

Basically, the EmbeddableDocumentStore takes longer to save and Index that new data, than saving and querying.

So when your tests say:-

1. Store and SaveChanges.
2. Load.
3. Did this load?

The load completes much quicker than the indexing has had time to finish.

So, Like Daniel Lang said, you need to wait for stale results.

But, you'll have to do that for every query you wish to check, in your code. So, let's cheat (legally) :)

Here is how you can tell your document store to ALWAYS wait for stale results, if something queries the store:

// Initialise the Store.
var documentStore = new EmbeddableDocumentStore
                    {
                        RunInMemory = true
                    };
documentStore.Initialize();

// Force query's to wait for index's to catch up. Unit Testing only :P
documentStore.RegisterListener(new NoStaleQueriesListener());

....


#region Nested type: NoStaleQueriesListener

public class NoStaleQueriesListener : IDocumentQueryListener
{
    #region Implementation of IDocumentQueryListener

    public void BeforeQueryExecuted(IDocumentQueryCustomization queryCustomization)
    {
        queryCustomization.WaitForNonStaleResults();
    }

    #endregion
}

#endregion

Now to see this in action, check out RavenOverflow @ Github. And the Tests project in that solution has all the love you might want.