mirror of
https://github.com/kuhyx/screen-locker.git
synced 2026-11-10 22:47:13 +01:00
Krzysztof kuhy Rudnicki
4a36b6b264
Booleaness asserts, hoisted imports, fixture(name=...) instead of shadowing arguments, explicit encodings, snake_case names, comparison of bound methods, dead protected-access disables. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01WzxdWYdwRAtMg7ki6TKxuU
73 lines
2.2 KiB
Python
73 lines
2.2 KiB
Python
"""``--help`` answers and exits; an unknown flag is a usage error.
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Before this, both fell through to building the demo lock screen. Split from
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``test_cli.py`` for the 250-line cap. ``sys.exit`` is a no-op suite-wide (see
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conftest), so each test installs one that really raises ``SystemExit``.
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"""
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from __future__ import annotations
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from typing import TYPE_CHECKING, NoReturn, cast
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import pytest
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from screen_locker import _cli
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if TYPE_CHECKING:
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from screen_locker.screen_lock import ScreenLocker
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def _really_exit(code: int = 0) -> NoReturn:
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raise SystemExit(code)
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@pytest.fixture(autouse=True)
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def _exiting_sys_exit(monkeypatch: pytest.MonkeyPatch) -> None:
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monkeypatch.setattr(_cli.sys, "exit", _really_exit)
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class _NeverBuilt:
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"""A locker class whose construction would mean the guard failed."""
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def __init__(self, *_: object, **__: object) -> None:
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msg = "the lock screen must not be built"
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raise AssertionError(msg)
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def _main(argv: list[str]) -> None:
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locker_cls = cast("type[ScreenLocker]", _NeverBuilt)
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_cli.main(locker_cls, ["screen_lock.py", *argv])
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@pytest.mark.parametrize("flag", ["--help", "-h"])
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def test_help_prints_usage_and_exits_zero(
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flag: str, capsys: pytest.CaptureFixture[str]
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) -> None:
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"""Help goes to stdout and the process exits 0 before any UI."""
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with pytest.raises(SystemExit) as exited:
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_main(["--production", flag])
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assert not exited.value.code
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out = capsys.readouterr().out
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assert out.startswith("usage: python3 -m screen_locker.screen_lock")
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def test_unknown_flag_is_exit_two_with_usage(
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capsys: pytest.CaptureFixture[str],
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) -> None:
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"""A typo is named on stderr with the usage, and exits 2."""
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with pytest.raises(SystemExit) as exited:
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_main(["--prodution"])
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assert exited.value.code == 2
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err = capsys.readouterr().err
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assert "unknown argument(s): --prodution" in err
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assert "usage:" in err
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def test_subcommand_args_are_not_judged_here() -> None:
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"""Everything after a trailing-arg subcommand belongs to its own parser."""
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assert (
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_cli._own_args(["screen_lock.py", "--log-manual-workout", "--help", "--weird"])
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== []
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)
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assert _cli._own_args(["screen_lock.py", "--status"]) == ["--status"]
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