Hermes-agent

tests/tools/test_mcp_reconnect_signal.py

@@ -0,0 +1,57 @@
+"""Tests for the MCPServerTask reconnect signal.
+
+When the OAuth layer cannot recover in-place (e.g., external refresh of a
+single-use refresh_token made the SDK's in-memory refresh fail), the tool
+handler signals MCPServerTask to tear down the current MCP session and
+reconnect with fresh credentials. This file exercises the signal plumbing
+in isolation from the full stdio/http transport machinery.
+"""
+import asyncio
+
+import pytest
+
+
+@pytest.mark.asyncio
+async def test_reconnect_event_attribute_exists():
+    """MCPServerTask has a _reconnect_event alongside _shutdown_event."""
+    from tools.mcp_tool import MCPServerTask
+    task = MCPServerTask("test")
+    assert hasattr(task, "_reconnect_event")
+    assert isinstance(task._reconnect_event, asyncio.Event)
+    assert not task._reconnect_event.is_set()
+
+
+@pytest.mark.asyncio
+async def test_wait_for_lifecycle_event_returns_reconnect():
+    """When _reconnect_event fires, helper returns 'reconnect' and clears it."""
+    from tools.mcp_tool import MCPServerTask
+    task = MCPServerTask("test")
+
+    task._reconnect_event.set()
+    reason = await task._wait_for_lifecycle_event()
+    assert reason == "reconnect"
+    # Should have cleared so the next cycle starts fresh
+    assert not task._reconnect_event.is_set()
+
+
+@pytest.mark.asyncio
+async def test_wait_for_lifecycle_event_returns_shutdown():
+    """When _shutdown_event fires, helper returns 'shutdown'."""
+    from tools.mcp_tool import MCPServerTask
+    task = MCPServerTask("test")
+
+    task._shutdown_event.set()
+    reason = await task._wait_for_lifecycle_event()
+    assert reason == "shutdown"
+
+
+@pytest.mark.asyncio
+async def test_wait_for_lifecycle_event_shutdown_wins_when_both_set():
+    """If both events are set simultaneously, shutdown takes precedence."""
+    from tools.mcp_tool import MCPServerTask
+    task = MCPServerTask("test")
+
+    task._shutdown_event.set()
+    task._reconnect_event.set()
+    reason = await task._wait_for_lifecycle_event()
+    assert reason == "shutdown"