arcade-mcp/libs/tests/mcp/test_message_processor.py
Sam Partee b6b4cd0a4c
🏗️ Restructure: Multi-Package Architecture + uv Migration (#412)
### Overview
Major restructuring from monolithic `arcade-ai` package to modular
library architecture with standardized uv-based dependency management.

![arcade-ai Monorepo
(2)](https://github.com/user-attachments/assets/25f102b0-bb87-4a04-9701-d227d05664b1)

### New Package Structure
- **`arcade-tdk`** - Lightweight toolkit development kit (core
decorators, auth)
- **`arcade-core`** - Core execution engine and catalog functionality  
- **`arcade-serve`** - FastAPI/MCP server components
- **`arcade-ai`** - Meta package that includes CLI functionality.
Optionally include evals via the `evals` extra. Optionally include all
packages via the `all` extra.

### Key Benefits
- **Lighter Dependencies**: Toolkits now depend only on `arcade-tdk` (~2
deps) vs full `arcade-ai` (~30+ deps)
- **Faster Builds**: uv provides 10-100x faster dependency resolution
and installation
- **Better Modularity**: Clear separation of concerns, consumers import
only what they need
- **Standard Tooling**: Eliminates custom poetry scripts, uses standard
Python packaging

### Migration Impact
- All 20 toolkits converted from poetry → uv with `arcade-tdk`
dependencies plus `arcade-ai[evals]` and `arcade-serve` dev
dependencies. When developing locally, devs should install toolkits via
`make install-local`.
- Modern Python 3.10+ type hints throughout
- Standardized build system with hatchling backend
- Enhanced Makefile with robust toolkit management commands
- Removed `arcade dev` CLI command
- Reduce the number of files created by `arcade new` and add an option
to not generate a tests and evals folder.

This foundation enables faster development cycles and cleaner dependency
chains for the growing toolkit ecosystem.

### Todo After this PR is merged
- [ ] Post-merge workflow(s) (release & publish containers, etc)
- [ ] Release order plan. @EricGustin suggests releasing in the
following order:
    1. `arcade-core` version 0.1.0
    2. `arcade-serve` version 0.1.0 and `arcade-tdk` version 0.1.0
    3. `arcade-ai` version 2.0.0
4. Patch release for all toolkits (all changes in toolkits are internal
refactors)
- [ ] [Update docs](https://github.com/ArcadeAI/docs/pull/318)

---------

Co-authored-by: Eric Gustin <eric@arcade.dev>
Co-authored-by: Eric Gustin <34000337+EricGustin@users.noreply.github.com>
2025-06-11 16:48:17 -07:00

56 lines
1.9 KiB
Python

import asyncio
import pytest
from arcade_serve.mcp.message_processor import MCPMessageProcessor, create_message_processor
from arcade_serve.mcp.types import InitializeRequest, PingRequest
@pytest.mark.asyncio
async def test_message_processor_parses_initialize_json():
"""Ensure JSON initialize strings are converted into InitializeRequest objects."""
json_init = '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{}}\n'
processor = MCPMessageProcessor()
result = await processor.process_request(json_init)
assert isinstance(result, InitializeRequest)
assert result.id == 1
assert result.method == "initialize"
@pytest.mark.asyncio
async def test_message_processor_passes_notifications_unchanged():
"""Unknown notifications should be passed through as parsed dictionaries without errors."""
json_notification = '{"jsonrpc":"2.0","id":null,"method":"notifications/custom","params":{}}\n'
processor = MCPMessageProcessor()
result = await processor.process_request(json_notification)
# The MCPMessageProcessor keeps unknown notifications as simple dicts
assert isinstance(result, dict)
assert result["method"] == "notifications/custom"
@pytest.mark.asyncio
async def test_message_processor_middleware_execution_order(monkeypatch):
"""Middleware (sync + async) should be executed in the order they were added."""
order: list[str] = []
def mw_sync(msg, direction): # type: ignore[return-value]
order.append("sync")
return msg
async def mw_async(msg, direction): # type: ignore[return-value]
await asyncio.sleep(0) # ensure it is truly async
order.append("async")
return msg
processor = create_message_processor(mw_sync, mw_async)
# Use a pre-parsed PingRequest instance so we don't test parsing again here
ping = PingRequest(id=42)
_ = await processor.process_request(ping)
assert order == ["sync", "async"]