Upload Assets to GitHub Release with Python Mock

import json
import os
import tempfile
from datetime import datetime

class ReleaseUploader:
    """Simulates uploading assets to a release with a mock server."""
    
    def __init__(self, owner: str, repo: str, tag: str):
        self.owner = owner
        self.repo = repo
        self.tag = tag
        self.uploaded = {}
    
    def mock_upload(self, file_path: str, asset_name: str = None) -> dict:
        """Uploads a file to the mock release and returns the response."""
        if not os.path.isfile(file_path):
            raise FileNotFoundError(f"No such file: {file_path}")
        
        upload_id = f"asset_{len(self.uploaded) + 1:03d}"
        asset_name = asset_name or os.path.basename(file_path)
        size = os.path.getsize(file_path)
        
        response = {
            "url": f"https://mock.example.com/repos/{self.owner}/{self.repo}/releases/{self.tag}/assets/{asset_name}",
            "id": upload_id,
            "name": asset_name,
            "size": size,
            "uploaded_at": datetime.utcnow().isoformat(),
            "state": "uploaded"
        }
        
        self.uploaded[upload_id] = response
        return response

if __name__ == "__main__":
    uploader = ReleaseUploader("octocat", "hello-world", "v1.0.0")
    
    # Simulate uploading two files
    with tempfile.NamedTemporaryFile(mode='w', suffix='.txt', delete=False) as f1, \
         tempfile.NamedTemporaryFile(mode='w', suffix='.zip', delete=False) as f2:
        f1.write("Release notes content")
        f2.write("binary content placeholder")
        file1, file2 = f1.name, f2.name
    
    upload1 = uploader.mock_upload(file1, "README.txt")
    upload2 = uploader.mock_upload(file2)
    
    print(json.dumps(list(uploader.uploaded.values()), indent=2))
    
    # Cleanup temp files
    os.unlink(file1)
    os.unlink(file2)