approval-engine/tests/test_claim_contract.py

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import json
from pathlib import Path
from approval_engine.binding import binding_digest
from tests.conftest import approve, binding
ROOT = Path(__file__).resolve().parents[1]
def test_schema_forbids_decision_keys():
schema = json.loads((ROOT / "schemas/approval_claim.schema.json").read_text())
assert "not" in schema
kinds = [item["required"][0] for item in schema["not"]["anyOf"]]
assert set(kinds) >= {"effect", "decision", "allow", "deny"}
def test_claim_has_issuer_digest_freshness(engine):
obj = approve(engine)
claim = engine.claim(obj.id)
assert claim["kind"] == "approval-claim"
assert claim["issuer"] == "approval-engine"
assert claim["approval_id"] == obj.id
assert claim["valid_now"] is True
assert claim["reason_code"] == "ok"
assert claim["binding"]["digest"] == binding_digest(binding())
assert claim["freshness"]["ttl_seconds"] == 30
assert claim["freshness"]["not_after"] == "2026-08-29T12:00:30+00:00"
assert "effect" not in claim
assert "decision" not in claim
assert "yields_to" in claim
def test_wrong_target_changes_digest():
a = binding()
b = binding(target={"id": "other-lane", "stage": "prod"})
assert binding_digest(a) != binding_digest(b)
def test_wrong_action_changes_digest():
assert binding_digest(binding()) != binding_digest(binding(action="secrets.kv.read"))
def test_pdp_digest_is_recorded_not_recomputed(engine):
pdp = "sha256:" + "ab" * 32
obj = approve(engine, pdp_digest=pdp)
claim = engine.claim(obj.id)
assert claim["binding"]["pdp_digest"] == pdp
assert claim["binding"]["digest"] == binding_digest(binding())
assert claim["binding"]["digest"] != pdp
def test_examples_are_claim_shaped():
for name in ("claim.valid.json", "claim.revoked.json"):
data = json.loads((ROOT / "examples" / name).read_text())
assert data["kind"] == "approval-claim"
assert data["issuer"] == "approval-engine"
for forbidden in ("effect", "decision", "allow", "deny"):
assert forbidden not in data