SpringBoot和mybatis采用junit测试时找不到mapper.xml

怎么办
正常启动项目通过浏览器测试没有问题，通过junit测试报Invalid bound statement (not found)，看日志是没扫描到mapper.xml配置文件，我猜想是springboot的application.properties也没读取到
Property 'mapperLocations' was not specified or no matching resources found