@Override public FixtureProvider[] fixtureProviders() { return new FixtureProvider[] { new Db4oFixtureProvider(), new SimpleFixtureProvider( SET_SPEC, new CollectionSpec<HashSet<CollectionElement>>( HashSet.class, CollectionFactories.activatableHashSetFactory(), CollectionFactories.plainHashSetFactory()), new CollectionSpec<TreeSet<CollectionElement>>( TreeSet.class, CollectionFactories.activatableTreeSetFactory(), CollectionFactories.plainTreeSetFactory())), }; }