test_mpack_presign.py
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| 1 | """TDD — build_presign_payload: client-side Step 1 of the mpack push protocol. |
| 2 | |
| 3 | PS-1 Given known bytes, mpack_key is "sha256:" + sha256(bytes).hexdigest(). |
| 4 | PS-2 size_bytes equals len(mpack_bytes). |
| 5 | PS-3 Empty bytes produce a valid (non-empty) mpack_key and size_bytes == 0. |
| 6 | PS-4 Two calls with identical bytes produce identical payloads (deterministic). |
| 7 | PS-5 Two calls with different bytes produce different mpack_keys. |
| 8 | """ |
| 9 | from __future__ import annotations |
| 10 | |
| 11 | from muse.core.mpack import build_presign_payload |
| 12 | from muse.core.types import blob_id |
| 13 | |
| 14 | |
| 15 | def test_ps1_mpack_key_is_sha256_prefixed() -> None: |
| 16 | data = b"hello mpack" |
| 17 | payload = build_presign_payload(data) |
| 18 | assert payload["mpack_key"] == blob_id(data) |
| 19 | |
| 20 | |
| 21 | def test_ps2_size_bytes_matches_len() -> None: |
| 22 | data = b"x" * 1234 |
| 23 | payload = build_presign_payload(data) |
| 24 | assert payload["size_bytes"] == 1234 |
| 25 | |
| 26 | |
| 27 | def test_ps3_empty_bytes() -> None: |
| 28 | payload = build_presign_payload(b"") |
| 29 | assert payload["mpack_key"].startswith("sha256:") |
| 30 | assert len(payload["mpack_key"]) == len("sha256:") + 64 |
| 31 | assert payload["size_bytes"] == 0 |
| 32 | |
| 33 | |
| 34 | def test_ps4_deterministic() -> None: |
| 35 | data = b"same bytes every time" |
| 36 | assert build_presign_payload(data) == build_presign_payload(data) |
| 37 | |
| 38 | |
| 39 | def test_ps5_different_bytes_different_key() -> None: |
| 40 | a = build_presign_payload(b"aaaa") |
| 41 | b = build_presign_payload(b"bbbb") |
| 42 | assert a["mpack_key"] != b["mpack_key"] |