66 lines
2.6 KiB
Python
66 lines
2.6 KiB
Python
"""SpaceDevs caches survive empty files and failed disk writes."""
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import errno
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import json
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from datetime import datetime, timedelta
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from pathlib import Path
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from unittest.mock import Mock
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import pytest
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from agenda import thespacedevs
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@pytest.mark.parametrize("contents", ["", "{", "[]", '{"detail": "throttled"}'])
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def test_launch_cache_falls_back_to_usable_file(tmp_path: Path, contents: str) -> None:
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old = datetime.now() - timedelta(days=2)
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(tmp_path / old.strftime("%Y-%m-%d_%H:%M:%S.json")).write_text('{"results": []}')
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(tmp_path / datetime.now().strftime("%Y-%m-%d_%H:%M:%S.json")).write_text(contents)
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assert thespacedevs.load_cached_launches(str(tmp_path)) == {"results": []}
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assert thespacedevs.read_cached_launches(str(tmp_path)) == []
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assert not thespacedevs.is_launches_cache_fresh(str(tmp_path))
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def test_empty_file_is_not_parsed(
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tmp_path: Path, monkeypatch: pytest.MonkeyPatch
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) -> None:
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filename = tmp_path / "empty.json"
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filename.touch()
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parser = Mock(side_effect=AssertionError("empty file must not be parsed"))
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monkeypatch.setattr("agenda.thespacedevs.json.load", parser)
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assert thespacedevs.read_json_cache(str(filename)) is None
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parser.assert_not_called()
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@pytest.mark.parametrize("existing", [False, True])
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@pytest.mark.parametrize("failure", ["fsync", "replace"])
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def test_disk_failure_preserves_cache(
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tmp_path: Path, monkeypatch: pytest.MonkeyPatch, existing: bool, failure: str
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) -> None:
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filename = tmp_path / "cache.json"
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original = '{"results": ["old"]}'
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if existing:
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filename.write_text(original)
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fail = Mock(side_effect=OSError(errno.ENOSPC, "No space left on device"))
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monkeypatch.setattr(f"agenda.thespacedevs.os.{failure}", fail)
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with pytest.raises(OSError, match="No space left"):
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thespacedevs.write_json_cache(str(filename), {"results": ["new"]})
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if existing:
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assert filename.read_text() == original
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else:
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assert not filename.exists()
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assert not list(tmp_path.glob(".cache-*"))
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def test_successful_write_replaces_empty_file(tmp_path: Path) -> None:
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filename = tmp_path / "cache.json"
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filename.touch()
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thespacedevs.write_json_cache(str(filename), {"results": []})
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assert json.loads(filename.read_text()) == {"results": []}
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assert not list(tmp_path.glob(".cache-*"))
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def test_all_empty_launch_files_return_no_cache(tmp_path: Path) -> None:
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(tmp_path / "2026-09-30_12:00:00.json").touch()
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assert thespacedevs.load_cached_launches(str(tmp_path)) is None
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assert not thespacedevs.is_launches_cache_fresh(str(tmp_path))
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