50 lines
1.5 KiB
Python
50 lines
1.5 KiB
Python
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"""Content-addressed gzip blob store (D-012)."""
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from __future__ import annotations
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import gzip
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import hashlib
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import pytest
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from mimic.storage.blob import blob_path, store_blob
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def test_blob_path_uses_two_byte_pairs(tmp_path) -> None:
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digest = "ab" + "cd" + "ef" * 30
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path = blob_path(tmp_path, digest)
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assert path == tmp_path / "ab" / "cd" / f"{digest}.gz"
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def test_blob_path_rejects_invalid_digest(tmp_path) -> None:
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with pytest.raises(ValueError, match="invalid sha256"):
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blob_path(tmp_path, "not-a-digest")
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def test_store_blob_writes_gzip_and_returns_digest(tmp_path) -> None:
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payload = b"hello world\n"
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expected = hashlib.sha256(payload).hexdigest()
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digest, path = store_blob(tmp_path, payload)
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assert digest == expected
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assert path == tmp_path / expected[0:2] / expected[2:4] / f"{expected}.gz"
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with gzip.open(path, "rb") as fh:
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assert fh.read() == payload
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def test_store_blob_is_idempotent(tmp_path) -> None:
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payload = b"same content"
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digest1, path1 = store_blob(tmp_path, payload)
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mtime_before = path1.stat().st_mtime_ns
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digest2, path2 = store_blob(tmp_path, payload)
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assert digest1 == digest2
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assert path1 == path2
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assert path2.stat().st_mtime_ns == mtime_before
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def test_store_blob_dedupes_distinct_payloads(tmp_path) -> None:
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_, p1 = store_blob(tmp_path, b"alpha")
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_, p2 = store_blob(tmp_path, b"beta")
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assert p1 != p2
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assert p1.exists()
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assert p2.exists()
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