[
  {
    "id": "$let baseline",
    "operator": "$let",
    "kind": "baseline",
    "operand": "all",
    "expression": {
      "$let": {
        "vars": {
          "a": 2
        },
        "in": "$$a"
      }
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": {\"$numberInt\": \"2\"}}",
      "present": true
    },
    "mongo": {
      "bson": "{\"v\": {\"$numberInt\": \"2\"}}",
      "present": true
    },
    "status": "EXACT_MATCH"
  },
  {
    "id": "$let vars: null",
    "operator": "$let",
    "kind": "null",
    "operand": "vars",
    "expression": {
      "$let": {
        "vars": "$probe",
        "in": "$$a"
      }
    },
    "input": {
      "probe": null
    },
    "srotax": {
      "bson": "{\"v\": null}",
      "present": true
    },
    "mongo": {
      "message": "Invalid $project :: caused by :: invalid parameter: expected an object (vars)",
      "code": 10065,
      "error": "Location10065"
    },
    "status": "DIFFERENCE"
  },
  {
    "id": "$let vars: missing",
    "operator": "$let",
    "kind": "missing",
    "operand": "vars",
    "expression": {
      "$let": {
        "vars": "$probe",
        "in": "$$a"
      }
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": null}",
      "present": true
    },
    "mongo": {
      "message": "Invalid $project :: caused by :: invalid parameter: expected an object (vars)",
      "code": 10065,
      "error": "Location10065"
    },
    "status": "DIFFERENCE"
  },
  {
    "id": "$let vars: zero",
    "operator": "$let",
    "kind": "zero",
    "operand": "vars",
    "expression": {
      "$let": {
        "vars": "$probe",
        "in": "$$a"
      }
    },
    "input": {
      "probe": 0
    },
    "srotax": {
      "bson": "{\"v\": null}",
      "present": true
    },
    "mongo": {
      "message": "Invalid $project :: caused by :: invalid parameter: expected an object (vars)",
      "code": 10065,
      "error": "Location10065"
    },
    "status": "DIFFERENCE"
  },
  {
    "id": "$let vars: negative",
    "operator": "$let",
    "kind": "negative",
    "operand": "vars",
    "expression": {
      "$let": {
        "vars": "$probe",
        "in": "$$a"
      }
    },
    "input": {
      "probe": -2
    },
    "srotax": {
      "bson": "{\"v\": null}",
      "present": true
    },
    "mongo": {
      "message": "Invalid $project :: caused by :: invalid parameter: expected an object (vars)",
      "code": 10065,
      "error": "Location10065"
    },
    "status": "DIFFERENCE"
  },
  {
    "id": "$let vars: decimal",
    "operator": "$let",
    "kind": "decimal",
    "operand": "vars",
    "expression": {
      "$let": {
        "vars": "$probe",
        "in": "$$a"
      }
    },
    "input": {
      "probe": 2.5
    },
    "srotax": {
      "bson": "{\"v\": null}",
      "present": true
    },
    "mongo": {
      "message": "Invalid $project :: caused by :: invalid parameter: expected an object (vars)",
      "code": 10065,
      "error": "Location10065"
    },
    "status": "DIFFERENCE"
  },
  {
    "id": "$let vars: numeric string",
    "operator": "$let",
    "kind": "numeric string",
    "operand": "vars",
    "expression": {
      "$let": {
        "vars": "$probe",
        "in": "$$a"
      }
    },
    "input": {
      "probe": "12"
    },
    "srotax": {
      "bson": "{\"v\": null}",
      "present": true
    },
    "mongo": {
      "message": "Invalid $project :: caused by :: invalid parameter: expected an object (vars)",
      "code": 10065,
      "error": "Location10065"
    },
    "status": "DIFFERENCE"
  },
  {
    "id": "$let vars: text",
    "operator": "$let",
    "kind": "text",
    "operand": "vars",
    "expression": {
      "$let": {
        "vars": "$probe",
        "in": "$$a"
      }
    },
    "input": {
      "probe": "hello"
    },
    "srotax": {
      "bson": "{\"v\": null}",
      "present": true
    },
    "mongo": {
      "message": "Invalid $project :: caused by :: invalid parameter: expected an object (vars)",
      "code": 10065,
      "error": "Location10065"
    },
    "status": "DIFFERENCE"
  },
  {
    "id": "$let vars: empty string",
    "operator": "$let",
    "kind": "empty string",
    "operand": "vars",
    "expression": {
      "$let": {
        "vars": "$probe",
        "in": "$$a"
      }
    },
    "input": {
      "probe": ""
    },
    "srotax": {
      "bson": "{\"v\": null}",
      "present": true
    },
    "mongo": {
      "message": "Invalid $project :: caused by :: invalid parameter: expected an object (vars)",
      "code": 10065,
      "error": "Location10065"
    },
    "status": "DIFFERENCE"
  },
  {
    "id": "$let vars: boolean",
    "operator": "$let",
    "kind": "boolean",
    "operand": "vars",
    "expression": {
      "$let": {
        "vars": "$probe",
        "in": "$$a"
      }
    },
    "input": {
      "probe": true
    },
    "srotax": {
      "bson": "{\"v\": null}",
      "present": true
    },
    "mongo": {
      "message": "Invalid $project :: caused by :: invalid parameter: expected an object (vars)",
      "code": 10065,
      "error": "Location10065"
    },
    "status": "DIFFERENCE"
  },
  {
    "id": "$let vars: false",
    "operator": "$let",
    "kind": "false",
    "operand": "vars",
    "expression": {
      "$let": {
        "vars": "$probe",
        "in": "$$a"
      }
    },
    "input": {
      "probe": false
    },
    "srotax": {
      "bson": "{\"v\": null}",
      "present": true
    },
    "mongo": {
      "message": "Invalid $project :: caused by :: invalid parameter: expected an object (vars)",
      "code": 10065,
      "error": "Location10065"
    },
    "status": "DIFFERENCE"
  },
  {
    "id": "$let vars: typed date",
    "operator": "$let",
    "kind": "typed date",
    "operand": "vars",
    "expression": {
      "$let": {
        "vars": "$probe",
        "in": "$$a"
      }
    },
    "input": {
      "probe": {
        "$date": "2026-01-15T15:00:00Z"
      }
    },
    "srotax": {
      "bson": "{\"v\": null}",
      "present": true
    },
    "mongo": {
      "message": "Invalid $project :: caused by :: invalid parameter: expected an object (vars)",
      "code": 10065,
      "error": "Location10065"
    },
    "status": "DIFFERENCE"
  },
  {
    "id": "$let vars: decimal128",
    "operator": "$let",
    "kind": "decimal128",
    "operand": "vars",
    "expression": {
      "$let": {
        "vars": "$probe",
        "in": "$$a"
      }
    },
    "input": {
      "probe": {
        "$numberDecimal": "1.25"
      }
    },
    "srotax": {
      "bson": "{\"v\": null}",
      "present": true
    },
    "mongo": {
      "message": "Invalid $project :: caused by :: invalid parameter: expected an object (vars)",
      "code": 10065,
      "error": "Location10065"
    },
    "status": "DIFFERENCE"
  },
  {
    "id": "$let vars: empty array",
    "operator": "$let",
    "kind": "empty array",
    "operand": "vars",
    "expression": {
      "$let": {
        "vars": "$probe",
        "in": "$$a"
      }
    },
    "input": {
      "probe": []
    },
    "srotax": {
      "bson": "{\"v\": null}",
      "present": true
    },
    "mongo": {
      "message": "Invalid $project :: caused by :: invalid parameter: expected an object (vars)",
      "code": 10065,
      "error": "Location10065"
    },
    "status": "DIFFERENCE"
  },
  {
    "id": "$let vars: numeric array",
    "operator": "$let",
    "kind": "numeric array",
    "operand": "vars",
    "expression": {
      "$let": {
        "vars": "$probe",
        "in": "$$a"
      }
    },
    "input": {
      "probe": [
        1,
        2,
        3
      ]
    },
    "srotax": {
      "bson": "{\"v\": null}",
      "present": true
    },
    "mongo": {
      "message": "Invalid $project :: caused by :: invalid parameter: expected an object (vars)",
      "code": 10065,
      "error": "Location10065"
    },
    "status": "DIFFERENCE"
  },
  {
    "id": "$let vars: mixed array",
    "operator": "$let",
    "kind": "mixed array",
    "operand": "vars",
    "expression": {
      "$let": {
        "vars": "$probe",
        "in": "$$a"
      }
    },
    "input": {
      "probe": [
        1,
        null,
        "x",
        3
      ]
    },
    "srotax": {
      "bson": "{\"v\": null}",
      "present": true
    },
    "mongo": {
      "message": "Invalid $project :: caused by :: invalid parameter: expected an object (vars)",
      "code": 10065,
      "error": "Location10065"
    },
    "status": "DIFFERENCE"
  },
  {
    "id": "$let vars: nested array",
    "operator": "$let",
    "kind": "nested array",
    "operand": "vars",
    "expression": {
      "$let": {
        "vars": "$probe",
        "in": "$$a"
      }
    },
    "input": {
      "probe": [
        [
          1,
          2
        ],
        [
          3
        ]
      ]
    },
    "srotax": {
      "bson": "{\"v\": null}",
      "present": true
    },
    "mongo": {
      "message": "Invalid $project :: caused by :: invalid parameter: expected an object (vars)",
      "code": 10065,
      "error": "Location10065"
    },
    "status": "DIFFERENCE"
  },
  {
    "id": "$let vars: empty object",
    "operator": "$let",
    "kind": "empty object",
    "operand": "vars",
    "expression": {
      "$let": {
        "vars": "$probe",
        "in": "$$a"
      }
    },
    "input": {
      "probe": {}
    },
    "srotax": {
      "bson": "{\"v\": null}",
      "present": true
    },
    "mongo": {
      "message": "Invalid $project :: caused by :: invalid parameter: expected an object (vars)",
      "code": 10065,
      "error": "Location10065"
    },
    "status": "DIFFERENCE"
  },
  {
    "id": "$let vars: object",
    "operator": "$let",
    "kind": "object",
    "operand": "vars",
    "expression": {
      "$let": {
        "vars": "$probe",
        "in": "$$a"
      }
    },
    "input": {
      "probe": {
        "x": 1
      }
    },
    "srotax": {
      "bson": "{\"v\": null}",
      "present": true
    },
    "mongo": {
      "message": "Invalid $project :: caused by :: invalid parameter: expected an object (vars)",
      "code": 10065,
      "error": "Location10065"
    },
    "status": "DIFFERENCE"
  },
  {
    "id": "$let vars: ISO date string",
    "operator": "$let",
    "kind": "ISO date string",
    "operand": "vars",
    "expression": {
      "$let": {
        "vars": "$probe",
        "in": "$$a"
      }
    },
    "input": {
      "probe": "2026-01-15T15:00:00Z"
    },
    "srotax": {
      "bson": "{\"v\": null}",
      "present": true
    },
    "mongo": {
      "message": "Invalid $project :: caused by :: invalid parameter: expected an object (vars)",
      "code": 10065,
      "error": "Location10065"
    },
    "status": "DIFFERENCE"
  },
  {
    "id": "$let in: null",
    "operator": "$let",
    "kind": "null",
    "operand": "in",
    "expression": {
      "$let": {
        "vars": {
          "a": 2
        },
        "in": "$probe"
      }
    },
    "input": {
      "probe": null
    },
    "srotax": {
      "bson": "{\"v\": null}",
      "present": true
    },
    "mongo": {
      "bson": "{\"v\": null}",
      "present": true
    },
    "status": "EXACT_MATCH"
  },
  {
    "id": "$let in: missing",
    "operator": "$let",
    "kind": "missing",
    "operand": "in",
    "expression": {
      "$let": {
        "vars": {
          "a": 2
        },
        "in": "$probe"
      }
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": null}",
      "present": true
    },
    "mongo": {
      "present": false
    },
    "status": "DIFFERENCE"
  },
  {
    "id": "$let in: zero",
    "operator": "$let",
    "kind": "zero",
    "operand": "in",
    "expression": {
      "$let": {
        "vars": {
          "a": 2
        },
        "in": "$probe"
      }
    },
    "input": {
      "probe": 0
    },
    "srotax": {
      "bson": "{\"v\": {\"$numberInt\": \"0\"}}",
      "present": true
    },
    "mongo": {
      "bson": "{\"v\": {\"$numberInt\": \"0\"}}",
      "present": true
    },
    "status": "EXACT_MATCH"
  },
  {
    "id": "$let in: negative",
    "operator": "$let",
    "kind": "negative",
    "operand": "in",
    "expression": {
      "$let": {
        "vars": {
          "a": 2
        },
        "in": "$probe"
      }
    },
    "input": {
      "probe": -2
    },
    "srotax": {
      "bson": "{\"v\": {\"$numberInt\": \"-2\"}}",
      "present": true
    },
    "mongo": {
      "bson": "{\"v\": {\"$numberInt\": \"-2\"}}",
      "present": true
    },
    "status": "EXACT_MATCH"
  },
  {
    "id": "$let in: decimal",
    "operator": "$let",
    "kind": "decimal",
    "operand": "in",
    "expression": {
      "$let": {
        "vars": {
          "a": 2
        },
        "in": "$probe"
      }
    },
    "input": {
      "probe": 2.5
    },
    "srotax": {
      "bson": "{\"v\": {\"$numberDouble\": \"2.5\"}}",
      "present": true
    },
    "mongo": {
      "bson": "{\"v\": {\"$numberDouble\": \"2.5\"}}",
      "present": true
    },
    "status": "EXACT_MATCH"
  },
  {
    "id": "$let in: numeric string",
    "operator": "$let",
    "kind": "numeric string",
    "operand": "in",
    "expression": {
      "$let": {
        "vars": {
          "a": 2
        },
        "in": "$probe"
      }
    },
    "input": {
      "probe": "12"
    },
    "srotax": {
      "bson": "{\"v\": \"12\"}",
      "present": true
    },
    "mongo": {
      "bson": "{\"v\": \"12\"}",
      "present": true
    },
    "status": "EXACT_MATCH"
  },
  {
    "id": "$let in: text",
    "operator": "$let",
    "kind": "text",
    "operand": "in",
    "expression": {
      "$let": {
        "vars": {
          "a": 2
        },
        "in": "$probe"
      }
    },
    "input": {
      "probe": "hello"
    },
    "srotax": {
      "bson": "{\"v\": \"hello\"}",
      "present": true
    },
    "mongo": {
      "bson": "{\"v\": \"hello\"}",
      "present": true
    },
    "status": "EXACT_MATCH"
  },
  {
    "id": "$let in: empty string",
    "operator": "$let",
    "kind": "empty string",
    "operand": "in",
    "expression": {
      "$let": {
        "vars": {
          "a": 2
        },
        "in": "$probe"
      }
    },
    "input": {
      "probe": ""
    },
    "srotax": {
      "bson": "{\"v\": \"\"}",
      "present": true
    },
    "mongo": {
      "bson": "{\"v\": \"\"}",
      "present": true
    },
    "status": "EXACT_MATCH"
  },
  {
    "id": "$let in: boolean",
    "operator": "$let",
    "kind": "boolean",
    "operand": "in",
    "expression": {
      "$let": {
        "vars": {
          "a": 2
        },
        "in": "$probe"
      }
    },
    "input": {
      "probe": true
    },
    "srotax": {
      "bson": "{\"v\": true}",
      "present": true
    },
    "mongo": {
      "bson": "{\"v\": true}",
      "present": true
    },
    "status": "EXACT_MATCH"
  },
  {
    "id": "$let in: false",
    "operator": "$let",
    "kind": "false",
    "operand": "in",
    "expression": {
      "$let": {
        "vars": {
          "a": 2
        },
        "in": "$probe"
      }
    },
    "input": {
      "probe": false
    },
    "srotax": {
      "bson": "{\"v\": false}",
      "present": true
    },
    "mongo": {
      "bson": "{\"v\": false}",
      "present": true
    },
    "status": "EXACT_MATCH"
  },
  {
    "id": "$let in: typed date",
    "operator": "$let",
    "kind": "typed date",
    "operand": "in",
    "expression": {
      "$let": {
        "vars": {
          "a": 2
        },
        "in": "$probe"
      }
    },
    "input": {
      "probe": {
        "$date": "2026-01-15T15:00:00Z"
      }
    },
    "srotax": {
      "bson": "{\"v\": {\"$date\": {\"$numberLong\": \"1768489200000\"}}}",
      "present": true
    },
    "mongo": {
      "bson": "{\"v\": {\"$date\": {\"$numberLong\": \"1768489200000\"}}}",
      "present": true
    },
    "status": "EXACT_MATCH"
  },
  {
    "id": "$let in: decimal128",
    "operator": "$let",
    "kind": "decimal128",
    "operand": "in",
    "expression": {
      "$let": {
        "vars": {
          "a": 2
        },
        "in": "$probe"
      }
    },
    "input": {
      "probe": {
        "$numberDecimal": "1.25"
      }
    },
    "srotax": {
      "bson": "{\"v\": {\"$numberDecimal\": \"1.25\"}}",
      "present": true
    },
    "mongo": {
      "bson": "{\"v\": {\"$numberDecimal\": \"1.25\"}}",
      "present": true
    },
    "status": "EXACT_MATCH"
  },
  {
    "id": "$let in: empty array",
    "operator": "$let",
    "kind": "empty array",
    "operand": "in",
    "expression": {
      "$let": {
        "vars": {
          "a": 2
        },
        "in": "$probe"
      }
    },
    "input": {
      "probe": []
    },
    "srotax": {
      "bson": "{\"v\": []}",
      "present": true
    },
    "mongo": {
      "bson": "{\"v\": []}",
      "present": true
    },
    "status": "EXACT_MATCH"
  },
  {
    "id": "$let in: numeric array",
    "operator": "$let",
    "kind": "numeric array",
    "operand": "in",
    "expression": {
      "$let": {
        "vars": {
          "a": 2
        },
        "in": "$probe"
      }
    },
    "input": {
      "probe": [
        1,
        2,
        3
      ]
    },
    "srotax": {
      "bson": "{\"v\": [{\"$numberInt\": \"1\"}, {\"$numberInt\": \"2\"}, {\"$numberInt\": \"3\"}]}",
      "present": true
    },
    "mongo": {
      "bson": "{\"v\": [{\"$numberInt\": \"1\"}, {\"$numberInt\": \"2\"}, {\"$numberInt\": \"3\"}]}",
      "present": true
    },
    "status": "EXACT_MATCH"
  },
  {
    "id": "$let in: mixed array",
    "operator": "$let",
    "kind": "mixed array",
    "operand": "in",
    "expression": {
      "$let": {
        "vars": {
          "a": 2
        },
        "in": "$probe"
      }
    },
    "input": {
      "probe": [
        1,
        null,
        "x",
        3
      ]
    },
    "srotax": {
      "bson": "{\"v\": [{\"$numberInt\": \"1\"}, null, \"x\", {\"$numberInt\": \"3\"}]}",
      "present": true
    },
    "mongo": {
      "bson": "{\"v\": [{\"$numberInt\": \"1\"}, null, \"x\", {\"$numberInt\": \"3\"}]}",
      "present": true
    },
    "status": "EXACT_MATCH"
  },
  {
    "id": "$let in: nested array",
    "operator": "$let",
    "kind": "nested array",
    "operand": "in",
    "expression": {
      "$let": {
        "vars": {
          "a": 2
        },
        "in": "$probe"
      }
    },
    "input": {
      "probe": [
        [
          1,
          2
        ],
        [
          3
        ]
      ]
    },
    "srotax": {
      "bson": "{\"v\": [[{\"$numberInt\": \"1\"}, {\"$numberInt\": \"2\"}], [{\"$numberInt\": \"3\"}]]}",
      "present": true
    },
    "mongo": {
      "bson": "{\"v\": [[{\"$numberInt\": \"1\"}, {\"$numberInt\": \"2\"}], [{\"$numberInt\": \"3\"}]]}",
      "present": true
    },
    "status": "EXACT_MATCH"
  },
  {
    "id": "$let in: empty object",
    "operator": "$let",
    "kind": "empty object",
    "operand": "in",
    "expression": {
      "$let": {
        "vars": {
          "a": 2
        },
        "in": "$probe"
      }
    },
    "input": {
      "probe": {}
    },
    "srotax": {
      "bson": "{\"v\": {}}",
      "present": true
    },
    "mongo": {
      "bson": "{\"v\": {}}",
      "present": true
    },
    "status": "EXACT_MATCH"
  },
  {
    "id": "$let in: object",
    "operator": "$let",
    "kind": "object",
    "operand": "in",
    "expression": {
      "$let": {
        "vars": {
          "a": 2
        },
        "in": "$probe"
      }
    },
    "input": {
      "probe": {
        "x": 1
      }
    },
    "srotax": {
      "bson": "{\"v\": {\"x\": {\"$numberInt\": \"1\"}}}",
      "present": true
    },
    "mongo": {
      "bson": "{\"v\": {\"x\": {\"$numberInt\": \"1\"}}}",
      "present": true
    },
    "status": "EXACT_MATCH"
  },
  {
    "id": "$let in: ISO date string",
    "operator": "$let",
    "kind": "ISO date string",
    "operand": "in",
    "expression": {
      "$let": {
        "vars": {
          "a": 2
        },
        "in": "$probe"
      }
    },
    "input": {
      "probe": "2026-01-15T15:00:00Z"
    },
    "srotax": {
      "bson": "{\"v\": \"2026-01-15T15:00:00Z\"}",
      "present": true
    },
    "mongo": {
      "bson": "{\"v\": \"2026-01-15T15:00:00Z\"}",
      "present": true
    },
    "status": "EXACT_MATCH"
  },
  {
    "id": "$let omit vars",
    "operator": "$let",
    "kind": "omitted named argument",
    "operand": "vars",
    "expression": {
      "$let": {
        "in": "$$a"
      }
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": null}",
      "present": true
    },
    "mongo": {
      "message": "Invalid $project :: caused by :: Missing 'vars' parameter to $let",
      "code": 16876,
      "error": "Location16876"
    },
    "status": "DIFFERENCE"
  },
  {
    "id": "$let omit in",
    "operator": "$let",
    "kind": "omitted named argument",
    "operand": "in",
    "expression": {
      "$let": {
        "vars": {
          "a": 2
        }
      }
    },
    "input": {},
    "srotax": {
      "error": "IllegalArgumentException",
      "message": "$let requires an 'in' expression"
    },
    "mongo": {
      "message": "Invalid $project :: caused by :: Missing 'in' parameter to $let",
      "code": 16877,
      "error": "Location16877"
    },
    "status": "BOTH_REJECTED"
  },
  {
    "id": "$let empty arguments",
    "operator": "$let",
    "kind": "empty arguments",
    "operand": "all",
    "expression": {
      "$let": []
    },
    "input": {},
    "srotax": {
      "error": "IllegalArgumentException",
      "message": "$let expects an object with 'vars' and 'in'"
    },
    "mongo": {
      "message": "Invalid $project :: caused by :: $let only supports an object as its argument",
      "code": 16874,
      "error": "Location16874"
    },
    "status": "BOTH_REJECTED"
  },
  {
    "id": "$let unknown option",
    "operator": "$let",
    "kind": "unknown option",
    "operand": "all",
    "expression": {
      "$let": {
        "unexpected": 1
      }
    },
    "input": {},
    "srotax": {
      "error": "IllegalArgumentException",
      "message": "$let requires an 'in' expression"
    },
    "mongo": {
      "message": "Invalid $project :: caused by :: Unrecognized parameter to $let: unexpected",
      "code": 16875,
      "error": "Location16875"
    },
    "status": "BOTH_REJECTED"
  },
  {
    "id": "mongodb-9-boundary-cases.json:13",
    "operator": "$let",
    "kind": "boundary example",
    "operand": "all",
    "expression": {
      "$let": {
        "vars": {
          "total": 5
        },
        "in": {
          "$add": [
            "$$total",
            2
          ]
        }
      }
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": {\"$numberDouble\": \"7.0\"}}",
      "present": true
    },
    "mongo": {
      "bson": "{\"v\": {\"$numberInt\": \"7\"}}",
      "present": true
    },
    "status": "DIFFERENCE"
  }
]