test-driver/tests/test_reference_scenario.py
tegwick 04e9573b5a T04: deterministic semantic kernel
Alice/Bob/Carol runs end to end, deterministically, replayable from seed.
16 tests pass, no third-party dependencies.

- src/testdriver: intent, provenance, world, actions, drivers, observers,
  oracles, evidence, energy, scenario, runner
- lab/minimal.py: the SUT, exposing the independent observation channel
  required by D-07
- evidence is stratified S1/S2/S3; Runner refuses to attribute S2/S3 to an
  actor; claims are frozen and provenance-checked at construction
- missing evidence yields INCONCLUSIVE, which outranks PASS in the run verdict
- EnergyEvents captured, no scoring (H-005 dormant)

The observation channel records both stored state and an out-of-band
enforcement probe; their disagreement is an invariant and is what detects an
authorization defect that leaves the audit trail intact. A seeded
RevokeIsCosmetic lab fails the run via both the claim and that invariant.

Also closes TD-WP-0001-T02 (stack and commands now exist).

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Assistant: claude-code
Assistant-Model: opus
Assistant-Process: 1629012@bnt-lap001
Assistant-Session: 78d4fb13-8a1e-474b-87a3-9b9261c49a39
2026-08-22 23:21:07 +02:00

70 lines
2.2 KiB
Python

"""The reference scenario must run deterministically and be replayable."""
from __future__ import annotations
import json
import pytest
from testdriver import Runner, Stratum, Verdict
from scenarios.alice_bob_carol import build
def run_once(variant: str = "baseline"):
world, driver, observer, asset, oracle = build(variant)
return Runner(world, driver, observer, oracle).run(asset), world
def test_reference_scenario_passes():
result, _ = run_once()
assert result.verdict is Verdict.PASS, [
j.as_dict() for j in result.judgments if j.verdict is not Verdict.PASS
]
def test_every_claim_is_judged():
result, _ = run_once()
judged = {j.assertion_id for j in result.judgments}
assert {"c-bob-reads", "c-carol-denied", "c-bob-revoked"} <= judged
def test_invariants_are_evaluated_after_every_step():
result, _ = run_once()
per_step = [j for j in result.judgments if j.assertion_id == "i-audit-append-only"]
assert len(per_step) == 3
def test_run_is_replayable_from_known_initial_state():
"""Two runs from the same seed produce identical judgments."""
first, _ = run_once()
second, _ = run_once()
assert [(j.assertion_id, j.verdict) for j in first.judgments] == [
(j.assertion_id, j.verdict) for j in second.judgments
]
assert first.run_id != second.run_id
def test_evidence_is_stratified_and_serializable():
result, _ = run_once()
pack = result.evidence
assert pack.of_stratum(Stratum.SURFACE)
assert pack.of_stratum(Stratum.REALIZATION)
assert pack.of_stratum(Stratum.JUDGMENT)
parsed = json.loads(pack.to_json())
assert parsed["run_id"] == result.run_id
assert parsed["sut_version"] == "lab-0.1.0-baseline"
def test_evidence_records_claim_provenance():
"""A verdict must be auditable for the independence of the claim behind it."""
result, _ = run_once()
assert result.evidence.provenance_index["c-bob-revoked"] == "human"
def test_actors_hold_isolated_credentials_and_memory():
_, world = run_once()
alice, bob = world.cast["alice"], world.cast["bob"]
assert alice.credentials["token"] != bob.credentials["token"]
alice.remember("secret", "only alice knows this")
assert bob.recall("secret") is None
assert bob.known_keys() == ()