[
  {
    "id": "$setWindowFields example",
    "stage": "$setWindowFields",
    "kind": "example",
    "pipeline": [
      {
        "$setWindowFields": {
          "sortBy": {
            "score": 1
          },
          "output": {
            "rank": {
              "$rank": {}
            }
          }
        }
      }
    ],
    "input": [
      {
        "score": 20
      },
      {
        "score": 10
      },
      {
        "score": 20
      }
    ],
    "result": [
      {
        "score": 20,
        "rank": 2
      },
      {
        "score": 10,
        "rank": 1
      },
      {
        "score": 20,
        "rank": 2
      }
    ]
  },
  {
    "id": "$setWindowFields empty input",
    "stage": "$setWindowFields",
    "kind": "empty input",
    "pipeline": [
      {
        "$setWindowFields": {
          "sortBy": {
            "score": 1
          },
          "output": {
            "rank": {
              "$rank": {}
            }
          }
        }
      }
    ],
    "input": [],
    "result": []
  },
  {
    "id": "$setWindowFields invalid specification",
    "stage": "$setWindowFields",
    "kind": "invalid specification",
    "pipeline": [
      {
        "$setWindowFields": null
      }
    ],
    "input": [
      {
        "score": 20
      },
      {
        "score": 10
      },
      {
        "score": 20
      }
    ],
    "error": "IllegalArgumentException",
    "message": "$setWindowFields stage expects an object"
  },
  {
    "id": "$setWindowFields unsupported sum",
    "stage": "$setWindowFields",
    "kind": "unsupported sum",
    "pipeline": [
      {
        "$setWindowFields": {
          "sortBy": {
            "score": 1
          },
          "output": {
            "total": {
              "$sum": "$score"
            }
          }
        }
      }
    ],
    "input": [
      {
        "score": 10
      }
    ],
    "error": "IllegalArgumentException",
    "message": "Unsupported window function: $sum"
  }
]