# 离线只读验证：不访问网络、不操作设备，只读取同目录合成输入。
import json, math, struct, statistics
from pathlib import Path
def check(d):
 out=[]
 for r in d:
  if r['status']==204: out.append('协议异常' if r['body'] else '无内容'); continue
  if not r['body'].strip(): out.append('缺少JSON'); continue
  try: out.append('有效对象' if isinstance(json.loads(r['body']),dict) else '类型不符')
  except ValueError: out.append('非法JSON')
 return out

if __name__=='__main__':
 fixture=json.loads(Path(__file__).with_name('fixture.json').read_text(encoding='utf-8'))
 actual=check(fixture['input'])
 assert actual==fixture['expected'], {'实际':actual,'预期':fixture['expected']}
 print(json.dumps({'状态':'通过','实际':actual,'边界':'仅离线合成样例，现场未测'},ensure_ascii=False))