{
  "topic": "OPC UA DateTime 100ns",
  "origin": "本文原创合成数据，未采集真实设备",
  "cases": [
    {
      "case_id": "Unix纪元",
      "kind": "正例",
      "input": {
        "ticks": 116444736000000000
      },
      "expected": {
        "utc": "1970-01-01T00:00:00.000000Z",
        "remainder_100ns": 0,
        "state": "concrete"
      }
    },
    {
      "case_id": "七个百纳秒余数",
      "kind": "正例",
      "input": {
        "ticks": 116444736000000007
      },
      "expected": {
        "utc": "1970-01-01T00:00:00.000000Z",
        "remainder_100ns": 7,
        "state": "concrete"
      }
    },
    {
      "case_id": "2026日期",
      "kind": "正例",
      "input": {
        "ticks": 134372736000000000
      },
      "expected": {
        "utc": "2026-10-24T00:00:00.000000Z",
        "remainder_100ns": 0,
        "state": "concrete"
      }
    },
    {
      "case_id": "最小边界",
      "kind": "正例",
      "input": {
        "ticks": 0
      },
      "expected": {
        "utc": null,
        "remainder_100ns": null,
        "state": "minimum_sentinel"
      }
    },
    {
      "case_id": "超出Int64",
      "kind": "显式负例",
      "input": {
        "ticks": 9223372036854775808
      },
      "expected_error": "超出有符号Int64"
    }
  ]
}