7.7Streaming

gRPC supports four communication patterns:

Pattern	Description	Use Case
Unary	Client sends one request, server sends one response	Standard CRUD
Server streaming	Client sends one request, server sends stream of responses	Live feed, log tailing
Client streaming	Client sends stream of requests, server sends one response	File upload, batch processing
Bidirectional	Both sides send streams simultaneously	Chat, real-time collaboration

Testing Server Streaming

def test_server_streaming(user_service):
    """Server streams all users matching a query."""
    request = user_pb2.ListUsersRequest(page=1, per_page=100)
    users = []
    for response in user_service.StreamUsers(request):
        users.append(response)
    assert len(users) > 0
    assert all(hasattr(u, "name") for u in users)