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https://github.com/HKUDS/nanobot.git
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ef0284a4e0
ExecTool hardcoded bash, breaking exec on Windows. Now uses cmd.exe via COMSPEC on Windows with a curated minimal env (PATH, SYSTEMROOT, etc.) that excludes secrets. bwrap sandbox gracefully skips on Windows.
270 lines
9.6 KiB
Python
270 lines
9.6 KiB
Python
"""Tests for cross-platform shell execution.
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Verifies that ExecTool selects the correct shell, environment, path-append
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strategy, and sandbox behaviour per platform — without actually running
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platform-specific binaries (all subprocess calls are mocked).
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"""
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from unittest.mock import AsyncMock, patch
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import pytest
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from nanobot.agent.tools.shell import ExecTool
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# ---------------------------------------------------------------------------
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# _build_env
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# ---------------------------------------------------------------------------
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class TestBuildEnvUnix:
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def test_expected_keys(self):
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with patch("nanobot.agent.tools.shell._IS_WINDOWS", False):
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env = ExecTool()._build_env()
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assert set(env) == {"HOME", "LANG", "TERM"}
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def test_home_from_environ(self, monkeypatch):
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monkeypatch.setenv("HOME", "/Users/dev")
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with patch("nanobot.agent.tools.shell._IS_WINDOWS", False):
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env = ExecTool()._build_env()
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assert env["HOME"] == "/Users/dev"
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def test_secrets_excluded(self, monkeypatch):
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monkeypatch.setenv("OPENAI_API_KEY", "sk-secret")
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monkeypatch.setenv("NANOBOT_TOKEN", "tok-secret")
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with patch("nanobot.agent.tools.shell._IS_WINDOWS", False):
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env = ExecTool()._build_env()
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assert "OPENAI_API_KEY" not in env
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assert "NANOBOT_TOKEN" not in env
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for v in env.values():
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assert "secret" not in v.lower()
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class TestBuildEnvWindows:
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_EXPECTED_KEYS = {
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"SYSTEMROOT", "COMSPEC", "USERPROFILE", "HOMEDRIVE",
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"HOMEPATH", "TEMP", "TMP", "PATHEXT", "PATH",
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}
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def test_expected_keys(self):
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with patch("nanobot.agent.tools.shell._IS_WINDOWS", True):
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env = ExecTool()._build_env()
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assert set(env) == self._EXPECTED_KEYS
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def test_secrets_excluded(self, monkeypatch):
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monkeypatch.setenv("OPENAI_API_KEY", "sk-secret")
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monkeypatch.setenv("NANOBOT_TOKEN", "tok-secret")
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with patch("nanobot.agent.tools.shell._IS_WINDOWS", True):
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env = ExecTool()._build_env()
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assert "OPENAI_API_KEY" not in env
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assert "NANOBOT_TOKEN" not in env
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for v in env.values():
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assert "secret" not in v.lower()
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def test_path_has_sensible_default(self):
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with (
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patch("nanobot.agent.tools.shell._IS_WINDOWS", True),
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patch.dict("os.environ", {}, clear=True),
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):
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env = ExecTool()._build_env()
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assert "system32" in env["PATH"].lower()
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def test_systemroot_forwarded(self, monkeypatch):
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monkeypatch.setenv("SYSTEMROOT", r"D:\Windows")
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with patch("nanobot.agent.tools.shell._IS_WINDOWS", True):
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env = ExecTool()._build_env()
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assert env["SYSTEMROOT"] == r"D:\Windows"
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# ---------------------------------------------------------------------------
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# _spawn
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# ---------------------------------------------------------------------------
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class TestSpawnUnix:
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@pytest.mark.asyncio
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async def test_uses_bash(self):
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with (
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patch("nanobot.agent.tools.shell._IS_WINDOWS", False),
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patch("asyncio.create_subprocess_exec", new_callable=AsyncMock) as mock_exec,
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):
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mock_exec.return_value = AsyncMock()
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await ExecTool._spawn("echo hi", "/tmp", {"HOME": "/tmp"})
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args = mock_exec.call_args[0]
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assert "bash" in args[0]
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assert "-l" in args
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assert "-c" in args
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assert "echo hi" in args
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class TestSpawnWindows:
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@pytest.mark.asyncio
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async def test_uses_comspec_from_env(self):
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env = {"COMSPEC": r"C:\Windows\system32\cmd.exe", "PATH": ""}
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with (
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patch("nanobot.agent.tools.shell._IS_WINDOWS", True),
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patch("asyncio.create_subprocess_exec", new_callable=AsyncMock) as mock_exec,
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):
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mock_exec.return_value = AsyncMock()
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await ExecTool._spawn("dir", r"C:\Users", env)
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args = mock_exec.call_args[0]
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assert "cmd.exe" in args[0]
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assert "/c" in args
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assert "dir" in args
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@pytest.mark.asyncio
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async def test_falls_back_to_default_comspec(self):
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env = {"PATH": ""}
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with (
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patch("nanobot.agent.tools.shell._IS_WINDOWS", True),
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patch.dict("os.environ", {}, clear=True),
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patch("asyncio.create_subprocess_exec", new_callable=AsyncMock) as mock_exec,
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):
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mock_exec.return_value = AsyncMock()
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await ExecTool._spawn("dir", r"C:\Users", env)
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args = mock_exec.call_args[0]
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assert args[0] == "cmd.exe"
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# ---------------------------------------------------------------------------
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# path_append
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# ---------------------------------------------------------------------------
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class TestPathAppendPlatform:
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@pytest.mark.asyncio
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async def test_unix_injects_export(self):
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"""On Unix, path_append is an export statement prepended to command."""
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mock_proc = AsyncMock()
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mock_proc.communicate.return_value = (b"ok", b"")
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mock_proc.returncode = 0
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with (
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patch("nanobot.agent.tools.shell._IS_WINDOWS", False),
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patch.object(ExecTool, "_spawn", return_value=mock_proc) as mock_spawn,
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patch.object(ExecTool, "_guard_command", return_value=None),
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):
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tool = ExecTool(path_append="/opt/bin")
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await tool.execute(command="ls")
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spawned_cmd = mock_spawn.call_args[0][0]
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assert 'export PATH="$PATH:/opt/bin"' in spawned_cmd
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assert spawned_cmd.endswith("ls")
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@pytest.mark.asyncio
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async def test_windows_modifies_env(self):
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"""On Windows, path_append is appended to PATH in the env dict."""
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mock_proc = AsyncMock()
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mock_proc.communicate.return_value = (b"ok", b"")
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mock_proc.returncode = 0
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captured_env = {}
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async def capture_spawn(cmd, cwd, env):
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captured_env.update(env)
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return mock_proc
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with (
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patch("nanobot.agent.tools.shell._IS_WINDOWS", True),
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patch.object(ExecTool, "_spawn", side_effect=capture_spawn),
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patch.object(ExecTool, "_guard_command", return_value=None),
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):
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tool = ExecTool(path_append=r"C:\tools\bin")
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await tool.execute(command="dir")
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assert captured_env["PATH"].endswith(r";C:\tools\bin")
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# ---------------------------------------------------------------------------
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# sandbox
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# ---------------------------------------------------------------------------
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class TestSandboxPlatform:
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@pytest.mark.asyncio
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async def test_bwrap_skipped_on_windows(self):
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"""bwrap must be silently skipped on Windows, not crash."""
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mock_proc = AsyncMock()
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mock_proc.communicate.return_value = (b"ok", b"")
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mock_proc.returncode = 0
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with (
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patch("nanobot.agent.tools.shell._IS_WINDOWS", True),
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patch.object(ExecTool, "_spawn", return_value=mock_proc) as mock_spawn,
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patch.object(ExecTool, "_guard_command", return_value=None),
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):
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tool = ExecTool(sandbox="bwrap")
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result = await tool.execute(command="dir")
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assert "ok" in result
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spawned_cmd = mock_spawn.call_args[0][0]
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assert "bwrap" not in spawned_cmd
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@pytest.mark.asyncio
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async def test_bwrap_applied_on_unix(self):
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"""On Unix, sandbox wrapping should still happen normally."""
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mock_proc = AsyncMock()
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mock_proc.communicate.return_value = (b"sandboxed", b"")
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mock_proc.returncode = 0
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with (
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patch("nanobot.agent.tools.shell._IS_WINDOWS", False),
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patch("nanobot.agent.tools.shell.wrap_command", return_value="bwrap -- sh -c ls") as mock_wrap,
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patch.object(ExecTool, "_spawn", return_value=mock_proc) as mock_spawn,
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patch.object(ExecTool, "_guard_command", return_value=None),
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):
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tool = ExecTool(sandbox="bwrap", working_dir="/workspace")
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await tool.execute(command="ls")
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mock_wrap.assert_called_once()
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spawned_cmd = mock_spawn.call_args[0][0]
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assert "bwrap" in spawned_cmd
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# ---------------------------------------------------------------------------
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# end-to-end (mocked subprocess, full execute path)
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# ---------------------------------------------------------------------------
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class TestExecuteEndToEnd:
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@pytest.mark.asyncio
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async def test_windows_full_path(self):
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"""Full execute() flow on Windows: env, spawn, output formatting."""
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mock_proc = AsyncMock()
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mock_proc.communicate.return_value = (b"hello world\r\n", b"")
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mock_proc.returncode = 0
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with (
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patch("nanobot.agent.tools.shell._IS_WINDOWS", True),
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patch.object(ExecTool, "_spawn", return_value=mock_proc),
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patch.object(ExecTool, "_guard_command", return_value=None),
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):
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tool = ExecTool()
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result = await tool.execute(command="echo hello world")
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assert "hello world" in result
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assert "Exit code: 0" in result
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@pytest.mark.asyncio
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async def test_unix_full_path(self):
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"""Full execute() flow on Unix: env, spawn, output formatting."""
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mock_proc = AsyncMock()
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mock_proc.communicate.return_value = (b"hello world\n", b"")
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mock_proc.returncode = 0
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with (
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patch("nanobot.agent.tools.shell._IS_WINDOWS", False),
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patch.object(ExecTool, "_spawn", return_value=mock_proc),
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patch.object(ExecTool, "_guard_command", return_value=None),
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):
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tool = ExecTool()
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result = await tool.execute(command="echo hello world")
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assert "hello world" in result
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assert "Exit code: 0" in result
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