Re: [Hibernate-devel] one-to-many associations and lazy initialization

[Georg S. <ge...@sc...>]

On Tuesday 12 February 2002 00:19, you wrote:
> I'm guessing, if you spotted this bug, you know how to write a test
> for it ... ?

I spotted it because I thought 6 seconds for retrieving a single object 
from the database isn't what one can call good performance... (but I 
think 6 seconds are very ok to load the whole database ;-). But you 
can't test this, so my solution for an automated test looks like this:

protected void testLazyCollections(SessionFactory sessions) throws 
Exception {
    Session s = sessions.openSession();
    Qux q = (Qux) s.create(Qux.class);
    s.commit();
    
    s = sessions.openSession();
    q = (Qux) s.load( Qux.class, new Long( q.getKey() ) );
    s.commit();
    
    boolean ok = false;
    try {
        q.getMoreFums().isEmpty();
    }
    catch (RuntimeException e) {
        ok = "Hibernate failed trying to load a 
collection".equals(e.getMessage());
    }
    assert( ok, "lazy collection with one-to-many" );
    
    ok = false;
    try {
        q.getFums().isEmpty();
    }
    catch (RuntimeException e) {
        ok = "Hibernate failed trying to load a 
collection".equals(e.getMessage());
    }
    assert( ok, "lazy collection with many-to-many" );

    s = sessions.openSession();
    q = (Qux) s.load( Qux.class, new Long( q.getKey() ) );
    s.delete(q);
    s.commit();
}