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66aaf420c9* Implement MCP background tasks (SEP-1686) using Docket Adds support for background task execution via the MCP task protocol, powered by Docket for task queue management. - Tools, resources, and prompts can be marked with `task=True` to run async - Progress dependency for tracking task progress - CurrentDocket and CurrentWorker dependencies for advanced use cases - Client API with `.call_tool(..., task=True)` returns task handles - Task status notifications via subscriptions - CLI worker command for distributed task processing Configuration via environment: - FASTMCP_ENABLE_DOCKET=true - FASTMCP_ENABLE_TASKS=true - FASTMCP_DOCKET_URL=redis://... (or memory:// for single-process) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com> * Fix tasks example import (TaskStatusResponse → GetTaskResult) The example was using a non-existent TaskStatusResponse type. Updated to use mcp.types.GetTaskResult which is what the on_status_change callback actually receives. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com> * Fix env var name in Docket error messages The error messages referenced FASTMCP_EXPERIMENTAL_ENABLE_DOCKET but the actual setting is FASTMCP_ENABLE_DOCKET. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com> * Remove deprecated code re-added from pre-#2329 branch - Remove ExtendedEnvSettingsSource (FASTMCP_SERVER_ prefix support) - Remove dependencies parameter from FastMCP.__init__ * Replace fakeredis git pin with PyPI release * Remove redundant fakeredis dev dep (pulled via pydocket) --------- Co-authored-by: Claude <noreply@anthropic.com> Co-authored-by: Jeremiah Lowin <153965+jlowin@users.noreply.github.com>
83 lines
2.5 KiB
Python
83 lines
2.5 KiB
Python
"""
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Tests for SEP-1686 protocol-level task handling.
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Generic protocol tests that use tools as test fixtures.
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Tests metadata, notifications, and error handling at the protocol level.
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"""
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import pytest
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from fastmcp import FastMCP
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from fastmcp.client import Client
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@pytest.fixture
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async def task_enabled_server():
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"""Create a FastMCP server with task-enabled tools."""
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mcp = FastMCP("task-test-server")
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@mcp.tool(task=True)
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async def simple_tool(message: str) -> str:
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"""A simple tool for testing."""
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return f"Processed: {message}"
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@mcp.tool(task=True)
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async def failing_tool() -> str:
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"""A tool that always fails."""
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raise ValueError("This tool always fails")
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assert mcp._support_tasks_by_default
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return mcp
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async def test_task_metadata_includes_task_id_and_ttl(task_enabled_server):
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"""Task metadata properly includes server-generated taskId and ttl."""
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async with Client(task_enabled_server) as client:
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# Submit with specific ttl (server generates task ID)
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task = await client.call_tool(
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"simple_tool",
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{"message": "test"},
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task=True,
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ttl=30000,
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)
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assert task
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assert not task.returned_immediately
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# Server should have generated a task ID
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assert task.task_id is not None
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assert isinstance(task.task_id, str)
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async def test_task_notification_sent_after_submission(task_enabled_server):
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"""Server sends notifications/tasks/created after task submission."""
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@task_enabled_server.tool(task=True)
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async def background_tool(message: str) -> str:
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return f"Processed: {message}"
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async with Client(task_enabled_server) as client:
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task = await client.call_tool("background_tool", {"message": "test"}, task=True)
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assert task
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assert not task.returned_immediately
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# Verify we can query the task
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status = await task.status()
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assert status.taskId == task.task_id
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async def test_failed_task_stores_error(task_enabled_server):
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"""Failed tasks store the error in results."""
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@task_enabled_server.tool(task=True)
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async def failing_task_tool() -> str:
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raise ValueError("This tool always fails")
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async with Client(task_enabled_server) as client:
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task = await client.call_tool("failing_task_tool", task=True)
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assert task
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assert not task.returned_immediately
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# Wait for task to fail
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status = await task.wait(state="failed", timeout=2.0)
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assert status.status == "failed"
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