moto/tests/test_s3/test_s3_metadata.py

import boto3

from moto import mock_aws
from moto.s3.responses import DEFAULT_REGION_NAME


@mock_aws
def test_s3_returns_requestid():
    s3_client = boto3.client("s3", region_name=DEFAULT_REGION_NAME)
    resp = s3_client.create_bucket(Bucket="mybucket")
    _check_metadata(resp)

    resp = s3_client.put_object(Bucket="mybucket", Key="steve", Body=b"is awesome")
    _check_metadata(resp)

    resp = s3_client.get_object(Bucket="mybucket", Key="steve")
    _check_metadata(resp)


def _check_metadata(resp):
    meta = resp["ResponseMetadata"]
    headers = meta["HTTPHeaders"]
    assert "RequestId" in meta
    assert "x-amzn-requestid" in headers
    assert meta["RequestId"] == headers["x-amzn-requestid"]