// run this on mongocryptd:
db.runCommand({
    "insert": "test",
    "documents": [
        {
            "_id": 1,
            "value": NumberInt("123")
        }
    ],
    "$db": "test",
    "encryptionInformation": {
        "type": 1,
        "schema": {
            "test.test": {
                "escCollection": "enxcol_.test.esc",
                "ecocCollection": "enxcol_.test.ecoc",
                "fields": [
                    {
                        "keyId": UUID("b337ba84-68ec-4df5-b711-6e87bcfb9096"),
                        "path": "value",
                        "bsonType": "long",
                        "queries": {
                            "queryType": "equality",
                            "contention": 0
                        }
                    }
                ]
            }
        }
    }
})
// Results in: MongoServerError: Cannot encrypt element of type int because schema requires that type is one of: [ long ]