{
  "fixture": "Modbus Read FIFO Queue",
  "cases": [
    {
      "case_id": "空队列",
      "kind": "正例",
      "result": {
        "byte_count": 2,
        "fifo_count": 0,
        "values": []
      }
    },
    {
      "case_id": "三个值",
      "kind": "正例",
      "result": {
        "byte_count": 8,
        "fifo_count": 3,
        "values": [
          7,
          8,
          9
        ]
      }
    },
    {
      "case_id": "计数矛盾",
      "kind": "显式负例",
      "rejected": "FIFO数量与字节数矛盾"
    }
  ],
  "assertions_passed": 3,
  "scope": "合成输入离线演算；未接真实设备"
}