60 lines
1.9 KiB
Python
60 lines
1.9 KiB
Python
from __future__ import annotations
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import struct
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from bakrest.usn_journal import (
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USN_REASON_BASIC_INFO_CHANGE,
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USN_REASON_CLOSE,
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USN_REASON_DATA_EXTEND,
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USN_REASON_DATA_OVERWRITE,
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USN_REASON_FILE_CREATE,
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USN_REASON_RENAME_NEW_NAME,
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is_meaningful_usn_reason,
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parse_usn_records,
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volume_name_for_path,
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)
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from pathlib import Path
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def test_usn_reason_filter_accepts_real_data_changes() -> None:
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assert is_meaningful_usn_reason(USN_REASON_DATA_OVERWRITE)
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assert is_meaningful_usn_reason(USN_REASON_DATA_EXTEND | USN_REASON_CLOSE)
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assert is_meaningful_usn_reason(USN_REASON_FILE_CREATE)
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assert is_meaningful_usn_reason(USN_REASON_RENAME_NEW_NAME)
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def test_usn_reason_filter_rejects_metadata_only_changes() -> None:
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assert not is_meaningful_usn_reason(USN_REASON_BASIC_INFO_CHANGE)
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assert not is_meaningful_usn_reason(USN_REASON_CLOSE)
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def test_parse_usn_record_v2_reason_and_file_reference() -> None:
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record = bytearray(64)
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struct.pack_into("<IHH", record, 0, 64, 2, 0)
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struct.pack_into("<Q", record, 8, 12345)
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struct.pack_into("<I", record, 40, USN_REASON_DATA_OVERWRITE)
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records = parse_usn_records(bytes(record))
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assert len(records) == 1
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assert records[0].file_reference_number == 12345
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assert records[0].reason == USN_REASON_DATA_OVERWRITE
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def test_parse_usn_record_v3_reason_and_file_reference() -> None:
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record = bytearray(80)
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struct.pack_into("<IHH", record, 0, 80, 3, 0)
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record[8:24] = (12345).to_bytes(16, "little")
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struct.pack_into("<I", record, 56, USN_REASON_FILE_CREATE)
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records = parse_usn_records(bytes(record))
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assert len(records) == 1
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assert records[0].file_reference_number == 12345
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assert records[0].reason == USN_REASON_FILE_CREATE
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def test_volume_name_is_normalized_to_uppercase_drive() -> None:
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assert volume_name_for_path(Path("c:/tmp")) == "\\\\.\\C:"
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assert volume_name_for_path(Path("C:/tmp")) == "\\\\.\\C:"
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