@Override
    public MapperResult getGroupIdList(MapperContext context) {
        String sql = "SELECT group_id FROM config_info WHERE tenant_id ='" + NamespaceUtil.getNamespaceDefaultId()
                + "' GROUP BY group_id LIMIT " + context.getStartRow() + "," + context.getPageSize();
        return new MapperResult(sql, Collections.emptyList());
    }
@Test
    void testGetGroupIdList() {
        MapperResult mapperResult = configInfoMapperByMySql.getGroupIdList(context);
        assertEquals(mapperResult.getSql(),
                "SELECT group_id FROM config_info WHERE tenant_id ='' GROUP BY group_id LIMIT " + startRow + "," + pageSize);
        assertArrayEquals(mapperResult.getParamList().toArray(), emptyObjs);
    }