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nia-sg-bot merged 1 commit into from
Oct 8, 2026
Merged

test(structural): cover SHA-256 blob provenance #78

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22 changes: 22 additions & 0 deletions tests/test_structural.py
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Original file line number Diff line number Diff line change
Expand Up @@ -132,6 +132,28 @@ def test_unstaged_uses_index_to_worktree_exact_identity_and_is_stable(tmp_path):
assert first["symbols"][0]["change_kind"] == "modified"


def test_sha256_repository_preserves_structural_blob_provenance(tmp_path):
"""Canonical artifacts must retain full SHA-256 Git blob identities."""
root = tmp_path / "sha256-repo"
root.mkdir()
git(root, "init", "--object-format=sha256")
git(root, "config", "user.name", "Structural Tests")
git(root, "config", "user.email", "structural@example.test")
write(root, "app.py", "def value():\n return 1\n")
commit(root)

old_oid = git(root, "rev-parse", "HEAD:app.py")
write(root, "app.py", "def value():\n return 2\n")
artifact = analyze_local_diff(str(root))

assert_valid(artifact)
provenance = json.loads(artifact["files"][0]["evidence"][0]["detail"])
assert provenance["old_oid"] == old_oid
assert provenance["new_oid"] == git(root, "hash-object", "app.py")
assert len(provenance["old_oid"]) == len(provenance["new_oid"]) == 64
assert artifact["symbols"][0]["change_kind"] == "modified"


@pytest.mark.parametrize("staged", [False, True])
def test_worktree_diffs_do_not_record_commit_range_mode(tmp_path, staged):
root = repo(tmp_path)
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