public void testMappedSuperclass() {
EntityManager em = emf.createEntityManager();
// Add two entities, each extending the same mapped interface
em.getTransaction().begin();
SubclassC sc = new SubclassC();
sc.setId(1010);
sc.setName("SubclassCMappedSuperName");
sc.setClassCName("SubclassCName");
SubclassD sd = new SubclassD();
sd.setId(2020);
sd.setName("SubclassDMappedSuperName");
sd.setClassDName("SubclassDName");