50 lines
1.4 KiB
Python
50 lines
1.4 KiB
Python
"""Tests for atomic config.json writes."""
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from __future__ import annotations
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import json
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import os
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import stat
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from pathlib import Path
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import pytest
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from nanobot.config.loader import load_config, save_config
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from nanobot.config.schema import Config
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def test_save_config_round_trips(tmp_path: Path) -> None:
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path = tmp_path / "config.json"
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save_config(Config(), path)
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loaded = load_config(path)
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assert loaded.agents.defaults.model
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@pytest.mark.skipif(os.name == "nt", reason="Windows does not expose POSIX file modes")
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def test_save_config_preserves_existing_file_mode(tmp_path: Path) -> None:
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path = tmp_path / "config.json"
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path.write_text("{}", encoding="utf-8")
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path.chmod(0o600)
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save_config(Config(), path)
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assert stat.S_IMODE(path.stat().st_mode) == 0o600
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def test_save_config_preserves_existing_file_when_write_fails(
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tmp_path: Path, monkeypatch: pytest.MonkeyPatch
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) -> None:
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path = tmp_path / "config.json"
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save_config(Config(), path)
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before = path.read_text(encoding="utf-8")
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def boom(self: Path, target: Path) -> Path: # noqa: ARG001
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raise OSError("simulated crash before replace")
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monkeypatch.setattr(Path, "replace", boom)
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with pytest.raises(OSError, match="simulated crash"):
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save_config(Config(), path)
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assert path.read_text(encoding="utf-8") == before
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assert json.loads(before) # still valid JSON
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