public void testWriteBehindCacheCreated() {
assertNotNull("EMF was not created.", emf);
WriteBehindCacheManager manager = getWBCacheManager();
assertNotNull("WriteBehindCacheManager should exist", manager);
WriteBehindCache wbcache = manager.getSystemWriteBehindCache();
assertNotNull("SystemWriteBehindCache should exist", wbcache);
assertTrue(String.format("Expecting %s to be an instance of %s",
wbcache, SimpleWriteBehindCache.class),
wbcache instanceof SimpleWriteBehindCache);