test: cover interrupt exit for all transports

Author: he-yufeng

tests/server/mcpserver/test_server.py

@@ -5,7 +5,7 @@
 from dataclasses import dataclass
 from pathlib import Path
 from types import SimpleNamespace
-from typing import Annotated, Any
+from typing import Annotated, Any, Literal
 from unittest.mock import AsyncMock, MagicMock, patch
 
 import anyio
@@ -111,10 +111,24 @@ def test_dependencies(self):
         mcp_no_deps = MCPServer("test")
         assert mcp_no_deps.dependencies == []
 
-    def test_stdio_keyboard_interrupt_exits_cleanly(self):
+    @pytest.mark.parametrize("transport", ["stdio", "sse", "streamable-http"])
+    def test_keyboard_interrupt_exits_cleanly(self, transport: Literal["stdio", "sse", "streamable-http"]):
         mcp = MCPServer("test")
 
         with patch("mcp.server.mcpserver.server.anyio.run", side_effect=KeyboardInterrupt) as run:
+            mcp.run(transport)
+
+        assert run.call_count == 1
+        if transport == "stdio":
+            run.assert_called_once_with(mcp.run_stdio_async)
+
+    def test_run_propagates_non_interrupt_errors(self):
+        mcp = MCPServer("test")
+
+        with (
+            patch("mcp.server.mcpserver.server.anyio.run", side_effect=RuntimeError("boom")) as run,
+            pytest.raises(RuntimeError, match="boom"),
+        ):
             mcp.run("stdio")
 
         run.assert_called_once_with(mcp.run_stdio_async)