test(redaction): þing-01 P2 (#135) — delivery-log/provenance redaction audit + permanent guards

tests/test_redaction_guard.py

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+"""Guards born from the þing-01 delivery-log/provenance redaction audit (#135,
+orð_09 §3 commitment; PLATFORM-001 multi-carrier redaction clause).
+
+The audit (2026-07-28) found the delivery clean: no credential in any carrier —
+log lines carry filenames/run_ids/counts/regions, and the provenance description
+(the one carrier that leaves the machine, into the store's metadata) is a closed
+set of delivery primitives. Each test pins one of those audited facts permanently
+so drift fails loud instead of leaking quietly.
+"""
+
+import json
+from pathlib import Path
+
+from views_postprocessing.delivery import provenance
+
+
+_PKG = Path(__file__).resolve().parent.parent / "views_postprocessing"
+
+# The delivery-path modules the audit certified credential-blind: they never read
+# the environment and never see a key (the manager's DIP port hands them data
+# only). A hit here means a credential VALUE could newly reach a delivery log
+# line or artifact — re-run the #135 audit before allowing it.
+_CREDENTIAL_BLIND = [
+    _PKG / "unfao" / "wire",
+    _PKG / "delivery",
+    _PKG / "unfao" / "historical.py",
+    _PKG / "unfao" / "track_a_source.py",
+    _PKG / "unfao" / "frame_extraction.py",
+]
+
+_FORBIDDEN_TOKENS = ("os.environ", "getenv", "load_dotenv", "API_KEY", "credentials")
+
+
+def _python_sources(path: Path):
+    if path.is_file():
+        yield path
+    else:
+        yield from sorted(path.rglob("*.py"))
+
+
+def test_wire_and_delivery_modules_stay_credential_blind():
+    hits = []
+    for root in _CREDENTIAL_BLIND:
+        for source in _python_sources(root):
+            text = source.read_text()
+            for token in _FORBIDDEN_TOKENS:
+                if token in text:
+                    hits.append(f"{source.relative_to(_PKG)}: {token!r}")
+    assert not hits, (
+        "credential-blind delivery modules now reference the environment or a "
+        f"credential (þing-01 #135 audit invalidated): {hits}"
+    )
+
+
+def test_provenance_carries_only_the_declared_closed_keyset():
+    # The description is uploaded into the store's metadata — it leaves the
+    # machine. Its content must stay exactly the declared delivery primitives.
+    prov = provenance.build_provenance(
+        lookup_version="gaul-2024a",
+        region="land_gaul",
+        expected_cell_count=64742,
+        actual_cell_count=64742,
+        unmapped_count=0,
+        fill_count=3,
+    )
+    assert set(prov) == {
+        "lookup_version",
+        "region",
+        "expected_cell_count",
+        "actual_cell_count",
+        "unmapped_count",
+        "fill_count",
+    }
+    round_trip = json.loads(provenance.compact_description(prov))
+    assert round_trip == prov