{
  "topic": "OPC UA GUID 字节序",
  "origin": "本文原创合成数据，未采集真实设备",
  "cases": [
    {
      "case_id": "GUID节点",
      "kind": "正例",
      "input": {
        "hex": "04 02 00 91 2B 96 72 75 FA E6 4A 8D 28 B4 04 DC 7D AF 63"
      },
      "expected": {
        "namespace": 2,
        "guid": "72962b91-fa75-4ae6-8d28-b404dc7daf63",
        "guid_wire_hex": "912b967275fae64a8d28b404dc7daf63"
      }
    },
    {
      "case_id": "顺序非对称GUID",
      "kind": "正例",
      "input": {
        "hex": "04 01 00 33 22 11 00 55 44 77 66 88 99 AA BB CC DD EE FF"
      },
      "expected": {
        "namespace": 1,
        "guid": "00112233-4455-6677-8899-aabbccddeeff",
        "guid_wire_hex": "33221100554477668899aabbccddeeff"
      }
    },
    {
      "case_id": "截短GUID",
      "kind": "显式负例",
      "input": {
        "hex": "04 02 00 91 2B 96 72"
      },
      "expected_error": "GUID NodeId应为19字节"
    }
  ]
}