MCP Server Code Execution Mode

import tempfile from pathlib import Path from unittest.mock import patch import pytest from mcp_server_code_execution_mode import ( RootlessContainerSandbox, SandboxError, detect_runtime, ) def test_detect_runtime_none(): with patch("shutil.which", return_value=None): assert detect_runtime() is None @pytest.mark.asyncio async def test_sandbox_init_no_runtime(): with patch("shutil.which", return_value=None): sandbox = RootlessContainerSandbox() assert sandbox.runtime is None # Should not crash on init # Should crash on execute (need to provide host_dir to reach runtime check) with tempfile.TemporaryDirectory() as tmpdir: with pytest.raises(SandboxError, match="No container runtime found"): await sandbox.execute("print('hello')", host_dir=Path(tmpdir)) # Should crash on _base_cmd with pytest.raises(SandboxError, match="No container runtime found"): sandbox._base_cmd()