Cloud + Python

import boto3
import io


def upload_file_to_s3(file_obj, bucket, key, object_metadata=None):
    """Upload a file-like object to S3 and return a metadata dict."""
    s3 = boto3.client("s3")
    content = file_obj.read()
    s3.put_object(
        Bucket=bucket,
        Key=key,
        Body=content,
        Metadata=…

import boto3
from unittest.mock import Mock, patch

class S3Uploader:
    def __init__(self, bucket_name):
        self.bucket_name = bucket_name
        self.s3 = boto3.client("s3", region_name="us-east-1")

    def upload_file(self, local_path, s3_key):
        self.s3.upload_file(local_path, self.bucket_name, s3_ke…

import io
import json
from datetime import datetime, timezone

class MockBlob:
    def __init__(self, name):
        self.name = name
        self.content = b""
        self.properties = {
            "last_modified": datetime.now(timezone.utc).isoformat(),
            "size": 0,
        }

    def upload(self, data, …

import io
from datetime import datetime
from unittest.mock import MagicMock, patch


class MockBlob:
    """Simulates a GCP storage blob for unit testing."""
    def __init__(self, name):
        self.name = name
        self.uploaded_at = None
        self.content = b""

    def upload_from_file(self, file_obj):
    …