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3a2e5f0 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 | """Tests for ``captioning.utils.hashing.sha256_file``."""
from __future__ import annotations
import hashlib
from pathlib import Path
from captioning.utils.hashing import sha256_file
def test_matches_oneshot_hash(tmp_path: Path) -> None:
"""Streaming SHA-256 must equal the one-shot SHA-256."""
p = tmp_path / "blob.bin"
payload = b"hello world\n" * 1000
p.write_bytes(payload)
assert sha256_file(p) == hashlib.sha256(payload).hexdigest()
def test_handles_empty_file(tmp_path: Path) -> None:
p = tmp_path / "empty.bin"
p.touch()
assert sha256_file(p) == hashlib.sha256(b"").hexdigest()
def test_handles_large_file(tmp_path: Path) -> None:
"""Larger than the internal 64 KB chunk to exercise the streaming path."""
p = tmp_path / "large.bin"
payload = b"x" * (256 * 1024) # 256 KB
p.write_bytes(payload)
assert sha256_file(p) == hashlib.sha256(payload).hexdigest()
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