## 安装单元测试依赖包 安装以下两个依赖包用于软件的单元测试 ```  $ composer require phpunit/phpunit mockery/mockery  $ composer require aliyuncs/oss-sdk-php   ``` * phpunit/phpunit mockery/mockery 用于单元测试的组件 * aliyuncs/oss-sdk-php 阿里云提供的OSS上传库