[
  {
    "id": "$bucketAuto example",
    "stage": "$bucketAuto",
    "kind": "example",
    "pipeline": [
      {
        "$bucketAuto": {
          "groupBy": "$price",
          "buckets": 2,
          "output": {
            "count": {
              "$sum": 1
            }
          }
        }
      }
    ],
    "input": [
      {
        "price": 1
      },
      {
        "price": 2
      },
      {
        "price": 10
      }
    ],
    "result": [
      {
        "_id": 1.0,
        "count": 2.0
      },
      {
        "_id": 5.5,
        "count": 1.0
      }
    ]
  },
  {
    "id": "$bucketAuto empty input",
    "stage": "$bucketAuto",
    "kind": "empty input",
    "pipeline": [
      {
        "$bucketAuto": {
          "groupBy": "$price",
          "buckets": 2,
          "output": {
            "count": {
              "$sum": 1
            }
          }
        }
      }
    ],
    "input": [],
    "result": []
  },
  {
    "id": "$bucketAuto invalid specification",
    "stage": "$bucketAuto",
    "kind": "invalid specification",
    "pipeline": [
      {
        "$bucketAuto": null
      }
    ],
    "input": [
      {
        "price": 1
      },
      {
        "price": 2
      },
      {
        "price": 10
      }
    ],
    "error": "IllegalArgumentException",
    "message": "$bucketAuto stage requires an object"
  },
  {
    "id": "$bucketAuto no numeric values",
    "stage": "$bucketAuto",
    "kind": "no numeric values",
    "pipeline": [
      {
        "$bucketAuto": {
          "groupBy": "$price",
          "buckets": 2
        }
      }
    ],
    "input": [
      {},
      {
        "price": null
      },
      {
        "price": "x"
      }
    ],
    "result": []
  }
]