@Override
    public Long createGroup(MemberGroupCreateReqVO createReqVO) {
        // 插入
        MemberGroupDO group = MemberGroupConvert.INSTANCE.convert(createReqVO);
        memberGroupMapper.insert(group);
        // 返回
        return group.getId();
    }
@Test
    public void testCreateGroup_success() {
        // 准备参数
        MemberGroupCreateReqVO reqVO = randomPojo(MemberGroupCreateReqVO.class,
                o -> o.setStatus(randomCommonStatus()));

        // 调用
        Long groupId = groupService.createGroup(reqVO);
        // 断言
        assertNotNull(groupId);
        // 校验记录的属性是否正确
        MemberGroupDO group = groupMapper.selectById(groupId);
        assertPojoEquals(reqVO, group);
    }