// Test that $bucket accepts a default value that falls outside the boundaries according to the
// collation.
results = coll.aggregate([{
                  $bucket: {
                      groupBy: "$num",
                      boundaries: ["100", "999"],
                      default: "2"  // Would fall between 100 and 999 if using the simple collation.
                  }
              }])
              .toArray(); 

{
    "ok" : 0,
    "errmsg" : "The $bucket 'default' field must be less than the lowest boundary or greater than or equal to the highest boundary.",
    "code" : 40199,
    "codeName" : "Location40199",
    "$clusterTime" : {
        "clusterTime" : Timestamp(1712858859, 25),
        "signature" : {
            "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
            "keyId" : NumberLong(0)
        }
    },
    "operationTime" : Timestamp(1712858859, 25)
}