[
  {
    "id": "$toUpper baseline",
    "operator": "$toUpper",
    "kind": "baseline",
    "operand": "all",
    "expression": {
      "$toUpper": "Ca"
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": \"CA\"}",
      "present": true
    }
  },
  {
    "id": "$toUpper input: null",
    "operator": "$toUpper",
    "kind": "null",
    "operand": "input",
    "expression": {
      "$toUpper": "$probe"
    },
    "input": {
      "probe": null
    },
    "srotax": {
      "bson": "{\"v\": \"\"}",
      "present": true
    }
  },
  {
    "id": "$toUpper input: missing",
    "operator": "$toUpper",
    "kind": "missing",
    "operand": "input",
    "expression": {
      "$toUpper": "$probe"
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": \"\"}",
      "present": true
    }
  },
  {
    "id": "$toUpper input: zero",
    "operator": "$toUpper",
    "kind": "zero",
    "operand": "input",
    "expression": {
      "$toUpper": "$probe"
    },
    "input": {
      "probe": 0
    },
    "srotax": {
      "error": "IllegalArgumentException",
      "message": "$toUpper requires a string."
    }
  },
  {
    "id": "$toUpper input: negative",
    "operator": "$toUpper",
    "kind": "negative",
    "operand": "input",
    "expression": {
      "$toUpper": "$probe"
    },
    "input": {
      "probe": -2
    },
    "srotax": {
      "error": "IllegalArgumentException",
      "message": "$toUpper requires a string."
    }
  },
  {
    "id": "$toUpper input: decimal",
    "operator": "$toUpper",
    "kind": "decimal",
    "operand": "input",
    "expression": {
      "$toUpper": "$probe"
    },
    "input": {
      "probe": 2.5
    },
    "srotax": {
      "error": "IllegalArgumentException",
      "message": "$toUpper requires a string."
    }
  },
  {
    "id": "$toUpper input: numeric string",
    "operator": "$toUpper",
    "kind": "numeric string",
    "operand": "input",
    "expression": {
      "$toUpper": "$probe"
    },
    "input": {
      "probe": "12"
    },
    "srotax": {
      "bson": "{\"v\": \"12\"}",
      "present": true
    }
  },
  {
    "id": "$toUpper input: text",
    "operator": "$toUpper",
    "kind": "text",
    "operand": "input",
    "expression": {
      "$toUpper": "$probe"
    },
    "input": {
      "probe": "hello"
    },
    "srotax": {
      "bson": "{\"v\": \"HELLO\"}",
      "present": true
    }
  },
  {
    "id": "$toUpper input: empty string",
    "operator": "$toUpper",
    "kind": "empty string",
    "operand": "input",
    "expression": {
      "$toUpper": "$probe"
    },
    "input": {
      "probe": ""
    },
    "srotax": {
      "bson": "{\"v\": \"\"}",
      "present": true
    }
  },
  {
    "id": "$toUpper input: boolean",
    "operator": "$toUpper",
    "kind": "boolean",
    "operand": "input",
    "expression": {
      "$toUpper": "$probe"
    },
    "input": {
      "probe": true
    },
    "srotax": {
      "error": "IllegalArgumentException",
      "message": "$toUpper requires a string."
    }
  },
  {
    "id": "$toUpper input: false",
    "operator": "$toUpper",
    "kind": "false",
    "operand": "input",
    "expression": {
      "$toUpper": "$probe"
    },
    "input": {
      "probe": false
    },
    "srotax": {
      "error": "IllegalArgumentException",
      "message": "$toUpper requires a string."
    }
  },
  {
    "id": "$toUpper input: typed date",
    "operator": "$toUpper",
    "kind": "typed date",
    "operand": "input",
    "expression": {
      "$toUpper": "$probe"
    },
    "input": {
      "probe": {
        "$date": "2026-01-15T15:00:00Z"
      }
    },
    "srotax": {
      "error": "IllegalArgumentException",
      "message": "$toUpper requires a string."
    }
  },
  {
    "id": "$toUpper input: decimal128",
    "operator": "$toUpper",
    "kind": "decimal128",
    "operand": "input",
    "expression": {
      "$toUpper": "$probe"
    },
    "input": {
      "probe": {
        "$numberDecimal": "1.25"
      }
    },
    "srotax": {
      "error": "IllegalArgumentException",
      "message": "$toUpper requires a string."
    }
  },
  {
    "id": "$toUpper input: empty array",
    "operator": "$toUpper",
    "kind": "empty array",
    "operand": "input",
    "expression": {
      "$toUpper": "$probe"
    },
    "input": {
      "probe": []
    },
    "srotax": {
      "error": "IllegalArgumentException",
      "message": "$toUpper requires a string."
    }
  },
  {
    "id": "$toUpper input: numeric array",
    "operator": "$toUpper",
    "kind": "numeric array",
    "operand": "input",
    "expression": {
      "$toUpper": "$probe"
    },
    "input": {
      "probe": [
        1,
        2,
        3
      ]
    },
    "srotax": {
      "error": "IllegalArgumentException",
      "message": "$toUpper requires a string."
    }
  },
  {
    "id": "$toUpper input: mixed array",
    "operator": "$toUpper",
    "kind": "mixed array",
    "operand": "input",
    "expression": {
      "$toUpper": "$probe"
    },
    "input": {
      "probe": [
        1,
        null,
        "x",
        3
      ]
    },
    "srotax": {
      "error": "IllegalArgumentException",
      "message": "$toUpper requires a string."
    }
  },
  {
    "id": "$toUpper input: nested array",
    "operator": "$toUpper",
    "kind": "nested array",
    "operand": "input",
    "expression": {
      "$toUpper": "$probe"
    },
    "input": {
      "probe": [
        [
          1,
          2
        ],
        [
          3
        ]
      ]
    },
    "srotax": {
      "error": "IllegalArgumentException",
      "message": "$toUpper requires a string."
    }
  },
  {
    "id": "$toUpper input: empty object",
    "operator": "$toUpper",
    "kind": "empty object",
    "operand": "input",
    "expression": {
      "$toUpper": "$probe"
    },
    "input": {
      "probe": {}
    },
    "srotax": {
      "error": "IllegalArgumentException",
      "message": "$toUpper requires a string."
    }
  },
  {
    "id": "$toUpper input: object",
    "operator": "$toUpper",
    "kind": "object",
    "operand": "input",
    "expression": {
      "$toUpper": "$probe"
    },
    "input": {
      "probe": {
        "x": 1
      }
    },
    "srotax": {
      "error": "IllegalArgumentException",
      "message": "$toUpper requires a string."
    }
  },
  {
    "id": "$toUpper input: ISO date string",
    "operator": "$toUpper",
    "kind": "ISO date string",
    "operand": "input",
    "expression": {
      "$toUpper": "$probe"
    },
    "input": {
      "probe": "2026-01-15T15:00:00Z"
    },
    "srotax": {
      "bson": "{\"v\": \"2026-01-15T15:00:00Z\"}",
      "present": true
    }
  },
  {
    "id": "$toUpper empty arguments",
    "operator": "$toUpper",
    "kind": "empty arguments",
    "operand": "all",
    "expression": {
      "$toUpper": []
    },
    "input": {},
    "srotax": {
      "error": "IllegalArgumentException",
      "message": "$toUpper requires one argument"
    }
  },
  {
    "id": "$toUpper unknown option",
    "operator": "$toUpper",
    "kind": "unknown option",
    "operand": "all",
    "expression": {
      "$toUpper": {
        "unexpected": 1
      }
    },
    "input": {},
    "srotax": {
      "error": "IllegalArgumentException",
      "message": "$toUpper requires a string."
    }
  }
]