@Override
    public List<String> findUserLikeUsername(String username) {
        String sql = "SELECT username FROM users WHERE username LIKE ? " + SQL_DERBY_ESCAPE_BACK_SLASH_FOR_LIKE;
        return databaseOperate.queryMany(sql, new String[] {"%" + username + "%"}, String.class);
    }
@Test
    void testFindUserLikeUsername() {
        List<String> username = embeddedUserPersistService.findUserLikeUsername("username");
        assertEquals(0, username.size());
    }