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40 lines
1.2 KiB
Python
40 lines
1.2 KiB
Python
"""Native operating-system locking invariants for the local review sidecar."""
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from __future__ import annotations
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import os
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from typing import TYPE_CHECKING
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import pytest
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from strix.report.triage_store import _file_lock
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if TYPE_CHECKING:
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from pathlib import Path
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@pytest.mark.parametrize("contents", [b"", b"existing lock file"])
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def test_file_lock_excludes_other_handles_and_releases(tmp_path: Path, contents: bytes) -> None:
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"""Exercise fcntl on POSIX and the real msvcrt implementation on Windows."""
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path = tmp_path / "triage.lock"
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path.write_bytes(contents)
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first = os.open(path, os.O_RDWR)
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try:
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second = os.open(path, os.O_RDWR)
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try:
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_file_lock(first)
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try:
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with pytest.raises(OSError):
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_file_lock(second)
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# Locking/unlocking must agree on byte zero, regardless of position.
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os.lseek(first, 100, os.SEEK_SET)
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finally:
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_file_lock(first, unlock=True)
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_file_lock(second)
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_file_lock(second, unlock=True)
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finally:
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os.close(second)
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finally:
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os.close(first)
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assert path.read_bytes() == contents
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