Have you tried running the dao code in a transaction? Is your store
and find happening in different transactions? Also you should take a
note of "Unlike with most databases, queries and gets inside a
datastore transaction do not see the results of previous writes inside
that transaction. Specifically, if an entity is modified or deleted
within a transaction, a query or get will return the original version
of the entity as of the beginning of the transaction, or nothing if
the entity did not exist then." from the docs
http://code.google.com/appengine/docs/java/datastore/transactions.html

btw, for unit testing with the local datastore we have information on
our blog here

http://thoughts.inphina.com/2010/06/28/unit-testing-maven-based-jpa-application-on-gae/

Regards | Vikas

On Sep 28, 4:35 am, "David C. Hicks" <[email protected]> wrote:
>   I have followed the instructions I found and set up the
> LocalServiceTestHelper to act as a datastore.  I can save an entity in
> the datastore and re-read it, but then I make a call to search for all
> entities that match a criteria.  The resulting List<entity> collection
> throws an "Object Manager has been closed" exception as soon as I try to
> get the size().
>
> I understand that this is resolved in a real runtime environment by
> using the OpenEntityManagerInView filter, but in a testing environment
> the filter isn't in play.  I've been trying most of the day to figure
> out how to keep the object manager open through the life of a test, but
> damned if I can get it.  Anyone know of a good example somewhere?
>
> Thanks,
> Dave

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