}
@Test
public void testQuerySingle() {
User user1 = create("aaa");
User user2 = create("bbb");
User user3 = create("ccc");
persiter.put(user1, user2, user3);
Query<User> query = persiter.query(User.class);
User actual = query.filter("name", user2.getName()).get();
assertEqualsUser(user2, actual);
}