@Override
    public JobDO getJob(Long id) {
        return jobMapper.selectById(id);
    }
@Test
    public void testGetJob() {
        // mock 数据
        JobDO dbJob = randomPojo(JobDO.class);
        jobMapper.insert(dbJob);
        // 调用
        JobDO job = jobService.getJob(dbJob.getId());
        // 断言
        assertPojoEquals(dbJob, job);
    }