你现在是一名高级ai软件工程师，非常擅长通过llm模型解决软件应用需求，现在需要构建python工程利用ai实现基于api的自动化测试代码生成与执行，支持将用户每个测试需求分解成对1个或多个接口的调用，并基于接口返回描述对接口返回值进行测试，设计如下：
# 工作流程
1. 用户输入测试需求、接口描述文件（文件采用json格式，包含接口名称、请求参数描述、返回参数描述，接口描述等信息）。例如：
## 接口描述示例
[
  {
    "name": "/api/create_user",
    "description": "to create new user account in the system",
    "protocol": "http",
    "base_url": "http://123.0.0.1:8000"
    "method": "post",
    "url_parameters": {
       "version": {
           "type": "integer",
           "description": "the api's version",
           "required": "false"
       }
    },
    "request_parameters": {
      "username": { "type": "string", "description": "user name", "required": true },
      "email":    { "type": "string", "description": "the user's email", "required": false },
      "password": { "type": "string", "description": "the user's password", "required": true }
    },
    "response": {
      "code": {
        "type": "integer",
        "description": "0 is successful, nonzero is failure"
      },
      "user_id": {
        "type": "integer",
        "description": "the created user's id "
      }
    }
  },
  {
    "name": "change_password",
    "description": "replace old password with new password",
    "protocol": "function",
    "parameters": {
      "user_id":      { "type": "integer", "inout","in", "description": "the user's id", "required": true },
      "old_password": { "type": "string", "inout","in", "description": "the old password", "required": true },
      "new_password": { "type": "string", "inout","in", "description": "the user's new password", "required": true }
    },
    "return": {
      "type": "integer",
      "description": "0 is successful, nonzero is failure"
    }
  }，
  ...
]
## 测试需求示例
（1）创建用户，自动生成测试数据
（2）更改指定用户的密码，自动生成测试数据；支持先创建用户，再改变该用户的密码；

2. 软件将接口信息、指令、输出要求等通过提示词传递给llm模型。
3. llm模型结合用户测试需求，并根据接口列表生成针对每个测试需求的测试用例（包含生成的测试数据、代码等），测试用例支持基于测试逻辑对多个接口的调用与返回值测试
4. 输出的测试用例以json格式返回。
5. 软件解析json数据并生成测试用例文件
6. 软件运行测试用例文件并输出每个测试用例的结果；