134 lines
4.3 KiB
Python
134 lines
4.3 KiB
Python
"""Unit tests for :mod:`decnet.web.services.systemd_control`.
|
|
|
|
These tests monkeypatch :func:`asyncio.create_subprocess_exec` so we
|
|
never touch real ``systemctl``. The contract under test is:
|
|
|
|
* argv shape — ``["systemctl", <verb>, "decnet-<name>.service"]``
|
|
* non-zero return ⇒ :class:`SystemctlError` with returncode + stderr
|
|
* ``list_installed`` parses ``list-unit-files`` output into a name set
|
|
* cache honours the 30s TTL
|
|
"""
|
|
from __future__ import annotations
|
|
|
|
import asyncio
|
|
from typing import Any, List, Tuple
|
|
|
|
import pytest
|
|
|
|
from decnet.web.services import systemd_control as sc
|
|
|
|
|
|
class _FakeProc:
|
|
def __init__(self, returncode: int, stdout: bytes, stderr: bytes) -> None:
|
|
self.returncode = returncode
|
|
self._stdout = stdout
|
|
self._stderr = stderr
|
|
|
|
async def communicate(self) -> Tuple[bytes, bytes]:
|
|
return self._stdout, self._stderr
|
|
|
|
|
|
def _patch_exec(monkeypatch: Any, *, rc: int = 0, stdout: bytes = b"", stderr: bytes = b"") -> List[tuple]:
|
|
calls: List[tuple] = []
|
|
|
|
async def fake_exec(*argv: str, **_kwargs: Any) -> _FakeProc:
|
|
calls.append(argv)
|
|
return _FakeProc(rc, stdout, stderr)
|
|
|
|
monkeypatch.setattr(asyncio, "create_subprocess_exec", fake_exec)
|
|
return calls
|
|
|
|
|
|
@pytest.fixture(autouse=True)
|
|
def _reset_cache() -> None:
|
|
sc.reset_cache_for_tests()
|
|
yield
|
|
sc.reset_cache_for_tests()
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
async def test_start_builds_correct_argv(monkeypatch: Any) -> None:
|
|
calls = _patch_exec(monkeypatch, rc=0)
|
|
await sc.start("mutator")
|
|
assert calls == [("systemctl", "start", "decnet-mutator.service")]
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
async def test_stop_builds_correct_argv(monkeypatch: Any) -> None:
|
|
calls = _patch_exec(monkeypatch, rc=0)
|
|
await sc.stop("sniffer")
|
|
assert calls == [("systemctl", "stop", "decnet-sniffer.service")]
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
async def test_start_raises_systemctl_error_on_nonzero(monkeypatch: Any) -> None:
|
|
_patch_exec(monkeypatch, rc=5, stderr=b"Unit decnet-mutator.service not found.\n")
|
|
with pytest.raises(sc.SystemctlError) as exc_info:
|
|
await sc.start("mutator")
|
|
err = exc_info.value
|
|
assert err.returncode == 5
|
|
assert err.unit == "decnet-mutator.service"
|
|
assert "not found" in err.stderr
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
async def test_is_active_true_when_stdout_active(monkeypatch: Any) -> None:
|
|
_patch_exec(monkeypatch, rc=0, stdout=b"active\n")
|
|
assert await sc.is_active("bus") is True
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
async def test_is_active_false_when_inactive(monkeypatch: Any) -> None:
|
|
# systemctl exits 3 for "inactive" — is_active must treat that as a
|
|
# signal, not an error.
|
|
_patch_exec(monkeypatch, rc=3, stdout=b"inactive\n")
|
|
assert await sc.is_active("bus") is False
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
async def test_list_installed_parses_unit_files(monkeypatch: Any) -> None:
|
|
stdout = (
|
|
b"decnet-bus.service enabled enabled\n"
|
|
b"decnet-api.service enabled enabled\n"
|
|
b"decnet-mutator.service disabled enabled\n"
|
|
)
|
|
_patch_exec(monkeypatch, rc=0, stdout=stdout)
|
|
names = await sc.list_installed()
|
|
assert names == {"bus", "api", "mutator"}
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
async def test_list_installed_returns_empty_on_failure(monkeypatch: Any) -> None:
|
|
_patch_exec(monkeypatch, rc=1, stderr=b"systemctl: command not found\n")
|
|
names = await sc.list_installed()
|
|
assert names == set()
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
async def test_list_installed_is_cached(monkeypatch: Any) -> None:
|
|
stdout = b"decnet-bus.service enabled enabled\n"
|
|
calls = _patch_exec(monkeypatch, rc=0, stdout=stdout)
|
|
await sc.list_installed()
|
|
await sc.list_installed()
|
|
await sc.list_installed()
|
|
# Three logical calls, one real subprocess invocation.
|
|
assert len(calls) == 1
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
async def test_list_installed_force_bypasses_cache(monkeypatch: Any) -> None:
|
|
stdout = b"decnet-bus.service enabled enabled\n"
|
|
calls = _patch_exec(monkeypatch, rc=0, stdout=stdout)
|
|
await sc.list_installed()
|
|
await sc.list_installed(force=True)
|
|
assert len(calls) == 2
|
|
|
|
|
|
def test_invalid_worker_name_rejected() -> None:
|
|
with pytest.raises(ValueError):
|
|
sc._unit("../etc/passwd")
|
|
with pytest.raises(ValueError):
|
|
sc._unit("bus.service")
|
|
with pytest.raises(ValueError):
|
|
sc._unit("")
|