assertThat(user.getInitialKey(), not(""));
Manager stored = Datastore.getOrNull(Manager.class, user.getUid());
assertThat(stored, is(nullValue()));
tx.commit();
stored = Datastore.getOrNull(Manager.class, user.getUid());
assertThat(stored, instanceOf(Manager.class));
manager = (Manager)stored;
assertThat(manager.getName(), is(name));
assertThat(manager.getMail().getEmail(), is(mail));