{
  "fixture": "KNX DPT5.001 缩放",
  "cases": [
    {
      "case_id": "中点128",
      "kind": "正例",
      "result": {
        "percent": 50.19607843137255,
        "roundtrip_raw": 128,
        "step_percent": 0.39215686274509803
      }
    },
    {
      "case_id": "零",
      "kind": "正例",
      "result": {
        "percent": 0.0,
        "roundtrip_raw": 0,
        "step_percent": 0.39215686274509803
      }
    },
    {
      "case_id": "满量程",
      "kind": "正例",
      "result": {
        "percent": 100.0,
        "roundtrip_raw": 255,
        "step_percent": 0.39215686274509803
      }
    },
    {
      "case_id": "越界256",
      "kind": "显式负例",
      "rejected": "原始值超一字节"
    }
  ],
  "assertions_passed": 4,
  "scope": "合成输入离线演算；未接真实设备"
}