mirror of
https://github.com/kuhyx/steam-backlog-enforcer.git
synced 2026-11-11 13:07:33 +01:00
Krzysztof kuhy Rudnicki
fcae46faf1
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
78 lines
2.7 KiB
Python
78 lines
2.7 KiB
Python
"""Tests for _atomic_write — the shared atomic file-write primitive.
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Split out of ``test_config.py`` to hold both files inside the 250-line cap;
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``_atomic_write`` is a file-writing primitive rather than part of the config
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data model, and its permission behaviour is what several other modules rely on.
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"""
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from __future__ import annotations
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from typing import TYPE_CHECKING
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from unittest.mock import patch
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import pytest
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from steam_backlog_enforcer.config import _atomic_write
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if TYPE_CHECKING:
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from pathlib import Path
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class TestAtomicWrite:
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"""Tests for _atomic_write."""
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def test_writes_file(self, tmp_path: Path) -> None:
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"""Test writes file."""
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target = tmp_path / "out.json"
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_atomic_write(target, '{"key": "value"}\n')
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assert target.read_text(encoding="utf-8") == '{"key": "value"}\n'
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def test_defaults_to_owner_only(self, tmp_path: Path) -> None:
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"""Files that may hold secrets keep mkstemp's 0600."""
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target = tmp_path / "out.json"
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_atomic_write(target, "data")
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assert target.stat().st_mode & 0o777 == 0o600
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def test_honours_an_explicit_mode(self, tmp_path: Path) -> None:
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"""The mode lands on the result, not just on the temp file."""
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target = tmp_path / "out.json"
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_atomic_write(target, "data", mode=0o644)
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assert target.stat().st_mode & 0o777 == 0o644
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def test_creates_parent_dirs(self, tmp_path: Path) -> None:
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"""Test creates parent dirs."""
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target = tmp_path / "sub" / "deep" / "out.json"
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_atomic_write(target, "data")
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assert target.read_text(encoding="utf-8") == "data"
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def test_cleanup_on_write_error(self, tmp_path: Path) -> None:
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"""Test cleanup on write error."""
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target = tmp_path / "out.json"
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with (
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patch(
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"steam_backlog_enforcer.config.os.write",
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side_effect=OSError("disk full"),
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),
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pytest.raises(OSError, match="disk full"),
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):
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_atomic_write(target, "data")
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assert not target.exists()
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tmp_files = list(tmp_path.glob("*.tmp"))
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assert tmp_files == []
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def test_cleanup_on_replace_error(self, tmp_path: Path) -> None:
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"""Test cleanup on replace error."""
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target = tmp_path / "out.json"
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with (
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patch.object(
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type(target),
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"replace",
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side_effect=OSError("no perm"),
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),
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pytest.raises(OSError, match="no perm"),
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):
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_atomic_write(target, "data")
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assert not target.exists()
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tmp_files = list(tmp_path.glob("*.tmp"))
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assert tmp_files == []
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