225 lines
7.8 KiB
Python
225 lines
7.8 KiB
Python
"""Unit: smolvm subprocess wrapper (PRD 0023 chunk 2b).
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The wrapper is one thin function per smolvm CLI subcommand. Tests
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mock `subprocess.run` and assert on the constructed argv +
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SmolvmError raising on non-zero. The actual smolvm binary's
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behavior is exercised in chunk 2d's integration smoke test."""
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from __future__ import annotations
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import subprocess
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import unittest
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from pathlib import Path
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from unittest.mock import patch
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from bot_bottle.backend.smolmachines.smolvm import (
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SmolvmError,
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SmolvmRunResult,
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is_available,
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machine_cp,
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machine_create,
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machine_delete,
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machine_exec,
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machine_start,
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machine_stop,
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pack_create,
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)
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def _ok(stdout: str = "", stderr: str = "") -> subprocess.CompletedProcess:
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return subprocess.CompletedProcess(
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args=[], returncode=0, stdout=stdout, stderr=stderr,
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)
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def _fail(stderr: str = "boom") -> subprocess.CompletedProcess:
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return subprocess.CompletedProcess(
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args=[], returncode=1, stdout="", stderr=stderr,
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)
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class TestArgvShapes(unittest.TestCase):
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"""The CLI mixes `--name NAME` and positional-NAME styles
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across subcommands. The wrapper hides that inconsistency
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behind a uniform `name=` kwarg; lock down which form lands
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in each argv."""
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def _patch_run(self):
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return patch(
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"bot_bottle.backend.smolmachines.smolvm.subprocess.run",
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return_value=_ok(),
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)
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def test_pack_create_argv(self):
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with self._patch_run() as m:
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pack_create("bot-bottle-claude:latest", Path("/tmp/agent.smolmachine"))
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argv = m.call_args.args[0]
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self.assertEqual(
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["smolvm", "pack", "create",
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"--image", "bot-bottle-claude:latest",
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"-o", "/tmp/agent.smolmachine"],
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argv,
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)
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def test_machine_create_minimal(self):
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with self._patch_run() as m:
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machine_create("agent-xyz")
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self.assertEqual(
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["smolvm", "machine", "create", "agent-xyz"],
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m.call_args.args[0],
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)
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def test_machine_create_with_from_and_allow_cidr_and_env(self):
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with self._patch_run() as m:
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machine_create(
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"agent-xyz",
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from_path=Path("/stage/agent.smolmachine"),
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allow_cidrs=["192.168.50.2/32"],
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env={"HTTPS_PROXY": "http://192.168.50.2:8888"},
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)
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argv = m.call_args.args[0]
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# --from + --allow-cidr + -e are all flags, name is positional.
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self.assertEqual("smolvm", argv[0])
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self.assertIn("--from", argv)
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self.assertIn("/stage/agent.smolmachine", argv)
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# `--net` is explicit because smolvm 0.8.0's implied-net
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# from --allow-cidr doesn't fire when --from is set.
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self.assertIn("--net", argv)
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self.assertIn("--allow-cidr", argv)
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self.assertIn("192.168.50.2/32", argv)
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self.assertIn("-e", argv)
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self.assertIn("HTTPS_PROXY=http://192.168.50.2:8888", argv)
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self.assertEqual("agent-xyz", argv[-1])
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def test_machine_create_omits_net_when_no_allow_cidrs(self):
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with self._patch_run() as m:
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machine_create("agent-xyz", from_path=Path("/x.smolmachine"))
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self.assertNotIn("--net", m.call_args.args[0])
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def test_machine_start_uses_dash_name(self):
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# `start` is the --name flag form, NOT positional.
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with self._patch_run() as m:
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machine_start("agent-xyz")
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self.assertEqual(
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["smolvm", "machine", "start", "--name", "agent-xyz"],
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m.call_args.args[0],
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)
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def test_machine_stop_uses_dash_name(self):
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with self._patch_run() as m:
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machine_stop("agent-xyz")
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self.assertEqual(
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["smolvm", "machine", "stop", "--name", "agent-xyz"],
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m.call_args.args[0],
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)
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def test_machine_delete_uses_positional_name_and_force(self):
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# delete NAME is positional; -f required so no interactive
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# confirmation blocks teardown.
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with self._patch_run() as m:
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machine_delete("agent-xyz")
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self.assertEqual(
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["smolvm", "machine", "delete", "-f", "agent-xyz"],
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m.call_args.args[0],
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)
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def test_machine_exec_argv_with_separator(self):
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# `--` separator before the command — smolvm's flag parser
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# would otherwise grab argv items that look like flags.
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with self._patch_run() as m:
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machine_exec("agent-xyz", ["echo", "hello"])
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self.assertEqual(
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["smolvm", "machine", "exec", "--name", "agent-xyz",
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"--", "echo", "hello"],
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m.call_args.args[0],
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)
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def test_machine_exec_env_workdir_timeout(self):
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with self._patch_run() as m:
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machine_exec(
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"agent-xyz",
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["ls"],
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env={"FOO": "bar", "BAZ": "qux"},
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workdir="/app",
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timeout="30s",
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)
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argv = m.call_args.args[0]
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self.assertIn("-w", argv); self.assertIn("/app", argv)
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self.assertIn("--timeout", argv); self.assertIn("30s", argv)
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# Both env vars present as -e K=V pairs.
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for pair in ("FOO=bar", "BAZ=qux"):
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self.assertIn(pair, argv)
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def test_machine_cp_positional_argv(self):
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with self._patch_run() as m:
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machine_cp("/host/file", "agent-xyz:/dest/file")
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self.assertEqual(
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["smolvm", "machine", "cp",
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"/host/file", "agent-xyz:/dest/file"],
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m.call_args.args[0],
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)
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def test_machine_cp_empty_is_noop(self):
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# Guard against an upstream caller passing an unset path —
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# cp with an empty string is meaningless and would just
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# confuse smolvm's error message.
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with self._patch_run() as m:
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machine_cp("", "agent-xyz:/dest")
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machine_cp("/host", "")
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self.assertEqual(0, m.call_count)
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class TestErrorPath(unittest.TestCase):
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"""`check=True` paths raise SmolvmError on non-zero; `exec` is
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the one path that returns a result regardless."""
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def test_create_failure_raises(self):
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with patch(
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"bot_bottle.backend.smolmachines.smolvm.subprocess.run",
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return_value=_fail("no such image"),
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):
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with self.assertRaises(SmolvmError) as cm:
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machine_create("agent-xyz")
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self.assertEqual(1, cm.exception.returncode)
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self.assertIn("no such image", str(cm.exception))
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def test_pack_create_failure_raises(self):
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with patch(
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"bot_bottle.backend.smolmachines.smolvm.subprocess.run",
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return_value=_fail("pack failed"),
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):
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with self.assertRaises(SmolvmError):
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pack_create("missing:tag", Path("/tmp/out"))
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def test_exec_failure_returns_result(self):
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# The in-VM command's exit code is what Bottle.exec sees;
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# `false` exiting non-zero is not a smolvm failure.
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with patch(
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"bot_bottle.backend.smolmachines.smolvm.subprocess.run",
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return_value=subprocess.CompletedProcess(
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args=[], returncode=42, stdout="", stderr="nope",
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),
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):
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r = machine_exec("agent-xyz", ["sh", "-c", "exit 42"])
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self.assertEqual(SmolvmRunResult(42, "", "nope"), r)
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class TestIsAvailable(unittest.TestCase):
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def test_true_when_on_path(self):
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with patch(
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"bot_bottle.backend.smolmachines.smolvm.shutil.which",
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return_value="/usr/local/bin/smolvm",
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):
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self.assertTrue(is_available())
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def test_false_when_missing(self):
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with patch(
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"bot_bottle.backend.smolmachines.smolvm.shutil.which",
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return_value=None,
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):
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self.assertFalse(is_available())
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if __name__ == "__main__":
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unittest.main()
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