477 lines
19 KiB
Python
477 lines
19 KiB
Python
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"""Adversarial contracts for the fenced three-node Hermes execution pool."""
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from __future__ import annotations
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import json
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import subprocess
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import sys
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import threading
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import time
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from pathlib import Path
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import pytest
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import yaml
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ROOT = Path(__file__).parents[2]
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HERMES = ROOT / "services/hermes"
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SCRIPTS = HERMES / "scripts"
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sys.path[:0] = [str(SCRIPTS), str(HERMES / "scm-common/scripts")]
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import execution_pool_coordinator as coordinator # noqa: E402
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import execution_pool_client as pool_client # noqa: E402
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import execution_pool_protocol as protocol # noqa: E402
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import execution_pool_scm as scm # noqa: E402
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import execution_pool_worker as worker # noqa: E402
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KEY = b"k" * 32
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def binding(**values):
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result = {
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"board": "atlas",
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"task_id": "t_deadbeef",
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"run_id": "run-1234",
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"worker_ordinal": 0,
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"attempt": 1,
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}
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result.update(values)
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return result
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def assignment_payload(**values):
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result = {
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"context": "Implement the bounded objective.",
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"assignee": "cli-auto",
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"repo_url": "https://scm.bstein.dev/atlas/titan-iac.git",
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"branch": "feature/hermes-safe-pool",
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"base_branch": "main",
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"max_runtime_seconds": 3600,
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"deadline_unix": int(time.time()) + 3600,
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}
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result.update(values)
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return result
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def test_envelope_binds_run_ordinal_attempt_and_digest():
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signed = protocol.sign_envelope(KEY, "heartbeat", binding(), {"note": "active"})
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verified = protocol.verify_envelope(KEY, signed, expected_kind="heartbeat")
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assert verified["payload_digest"] == protocol.payload_digest({"note": "active"})
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for name, value in binding().items():
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assert verified[name] == value
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signed["attempt"] = 2
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with pytest.raises(protocol.ProtocolError, match="authentication"):
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protocol.verify_envelope(KEY, signed)
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def test_empty_poll_acknowledgement_is_authenticated():
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empty = {
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"board": "", "task_id": "", "run_id": "",
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"worker_ordinal": 2, "attempt": 0,
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}
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signed = protocol.sign_envelope(KEY, "ack", empty, {"assignment": None})
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assert protocol.verify_envelope(KEY, signed, expected_kind="ack")["payload"] == {
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"assignment": None
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}
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@pytest.mark.parametrize(
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"mutation,error",
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[
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({"board": "../atlas"}, "invalid board"),
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({"worker_ordinal": 3}, "outside the pool"),
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({"expires_at": 1}, "validity window"),
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],
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)
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def test_malformed_or_traversal_bindings_fail_closed(mutation, error):
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signed = protocol.sign_envelope(KEY, "heartbeat", binding(), {"note": "active"})
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signed.update(mutation)
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unsigned = dict(signed)
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unsigned.pop("signature")
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import hashlib
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import hmac
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signed["signature"] = hmac.new(
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KEY, protocol.canonical_json(unsigned), hashlib.sha256
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).hexdigest()
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with pytest.raises(protocol.ProtocolError, match=error):
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protocol.verify_envelope(KEY, signed)
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def test_oversized_and_malformed_payloads_are_rejected():
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with pytest.raises(protocol.ProtocolError, match="wire limit"):
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protocol.sign_envelope(
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KEY, "result", binding(), {"output": "x" * protocol.MAX_WIRE_BYTES}
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)
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with pytest.raises(protocol.ProtocolError, match="malformed"):
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protocol.parse_wire(b"{not-json")
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with pytest.raises(protocol.ProtocolError, match="oversized"):
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protocol.parse_wire(b"x" * (protocol.MAX_WIRE_BYTES + 1))
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def test_key_requires_private_regular_file_and_rejects_symlink(tmp_path):
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key = tmp_path / "key"
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key.write_bytes(KEY)
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key.chmod(0o644)
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with pytest.raises(protocol.ProtocolError, match="private"):
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protocol.read_key(key)
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key.chmod(0o600)
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assert protocol.read_key(key) == KEY
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link = tmp_path / "link"
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link.symlink_to(key)
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with pytest.raises(protocol.ProtocolError, match="unavailable"):
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protocol.read_key(link)
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with pytest.raises(protocol.ProtocolError, match="unavailable"):
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protocol.read_key(tmp_path / "missing")
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def test_local_signing_boundary_rejects_foreign_or_unassigned_result(monkeypatch):
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monkeypatch.setattr(pool_client, "ORDINAL", 0)
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boundary = pool_client.ClientBoundary(KEY)
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request = {"binding": binding(), "payload": {"note": "active"}}
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with pytest.raises(protocol.ProtocolError, match="does not own"):
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boundary.heartbeat(request)
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boundary.current = binding()
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request["binding"] = binding(worker_ordinal=1)
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with pytest.raises(protocol.ProtocolError, match="does not own"):
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boundary.heartbeat(request)
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def test_simultaneous_claim_materialization_has_one_winner(tmp_path):
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store = protocol.PoolStore(tmp_path / "pool.db")
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barrier = threading.Barrier(8)
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outcomes = []
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def add(index):
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barrier.wait()
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try:
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outcome = store.add(
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binding(task_id=f"t_{index}", run_id=f"run-{index}"),
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assignment_payload(),
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)
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except protocol.ProtocolError:
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outcome = False
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outcomes.append(outcome)
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threads = [threading.Thread(target=add, args=(index,)) for index in range(8)]
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for thread in threads:
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thread.start()
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for thread in threads:
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thread.join()
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assert outcomes.count(True) == 1
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assert store.available_ordinals() == [1, 2]
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def test_duplicate_assignment_is_idempotent_but_conflict_is_rejected(tmp_path):
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store = protocol.PoolStore(tmp_path / "pool.db")
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assert store.add(binding(), assignment_payload()) is True
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assert store.add(binding(), assignment_payload()) is False
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with pytest.raises(protocol.ProtocolError, match="conflicting"):
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store.add(binding(), assignment_payload(context="different"))
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with pytest.raises(protocol.ProtocolError, match="conflicting"):
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store.add(binding(worker_ordinal=1), assignment_payload())
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def test_duplicate_heartbeat_and_result_are_idempotent(tmp_path):
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store = protocol.PoolStore(tmp_path / "pool.db")
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store.add(binding(), assignment_payload())
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store.offer(0)
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heartbeat = protocol.sign_envelope(
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KEY, "heartbeat", binding(), {"note": "active"}, delivery_id="delivery-1"
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)
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assert store.heartbeat(heartbeat) == (True, False)
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assert store.heartbeat(heartbeat) == (True, True)
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result = protocol.sign_envelope(
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KEY, "result", binding(), {"structured": {"status": "completed"}}
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)
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_, duplicate = store.accept_result(result)
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assert duplicate is False
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_, duplicate = store.accept_result(result)
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assert duplicate is True
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def test_reused_delivery_and_stale_attempt_cannot_cross_runs(tmp_path):
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store = protocol.PoolStore(tmp_path / "pool.db")
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store.add(binding(), assignment_payload())
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first = protocol.sign_envelope(
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KEY, "heartbeat", binding(), {"note": "one"}, delivery_id="delivery-1"
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)
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store.heartbeat(first)
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reused = protocol.sign_envelope(
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KEY, "heartbeat", binding(), {"note": "two"}, delivery_id="delivery-1"
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)
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with pytest.raises(protocol.ProtocolError, match="reused"):
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store.heartbeat(reused)
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store.finalize(binding(), "finalized")
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store.add(binding(run_id="other-run"), assignment_payload())
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cross_run = protocol.sign_envelope(
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KEY, "heartbeat", binding(run_id="other-run"), {"note": "one"},
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delivery_id="delivery-1",
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)
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with pytest.raises(protocol.ProtocolError, match="reused"):
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store.heartbeat(cross_run)
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stale = protocol.sign_envelope(
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KEY, "result", binding(attempt=2), {"structured": {"status": "completed"}}
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)
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with pytest.raises(protocol.ProtocolError, match="attempt is stale"):
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store.accept_result(stale)
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replacement = protocol.sign_envelope(
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KEY,
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"result",
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binding(run_id="replacement-run"),
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{"structured": {"status": "completed"}},
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)
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with pytest.raises(protocol.ProtocolError, match="unknown or stale"):
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store.accept_result(replacement)
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def test_restart_heartbeat_loss_and_node_replacement_reuse_durable_assignment(tmp_path):
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database = tmp_path / "pool.db"
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first = protocol.PoolStore(database)
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first.add(binding(), assignment_payload())
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offered = first.offer(0)
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assert offered and offered["attempt"] == 1
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# Reopening the SQLite ledger models coordinator restart. An expired lease
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# is deliberately not reassigned across ordinals; the StatefulSet replaces
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# ordinal 0 with the same PVC and provider session state.
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restarted = protocol.PoolStore(database)
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with restarted._connect() as connection:
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connection.execute("UPDATE assignments SET lease_until=0")
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resumed = restarted.offer(0)
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assert resumed and resumed["run_id"] == "run-1234"
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assert resumed["attempt"] == 1
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assert restarted.offer(1) is None
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assert len(restarted.active_assignments()) == 1
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def test_result_conflict_never_overwrites_first_result(tmp_path):
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store = protocol.PoolStore(tmp_path / "pool.db")
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store.add(binding(), assignment_payload())
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first = protocol.sign_envelope(KEY, "result", binding(), {"returncode": 0})
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store.accept_result(first)
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conflict = protocol.sign_envelope(KEY, "result", binding(), {"returncode": 1})
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with pytest.raises(protocol.ProtocolError, match="conflicting result"):
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store.accept_result(conflict)
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def test_scm_workspace_is_ordinal_contained_and_rejects_symlink(tmp_path, monkeypatch):
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monkeypatch.setattr(scm, "WORKSPACE_ROOT", tmp_path)
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monkeypatch.setattr(scm, "ORDINAL", 0)
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signed = protocol.sign_envelope(KEY, "assignment", binding(), assignment_payload())
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path = scm.workspace_path(signed)
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assert path == tmp_path / "runs/atlas/t_deadbeef/run-1234"
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path.parent.mkdir(parents=True, exist_ok=True)
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path.symlink_to(tmp_path / "elsewhere", target_is_directory=True)
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with pytest.raises(protocol.ProtocolError, match="symlink"):
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scm.workspace_path(signed)
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root_case = tmp_path / "root-case"
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root_case.mkdir()
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root = tmp_path / "other-root"
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root.mkdir()
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(root_case / "runs").symlink_to(root, target_is_directory=True)
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monkeypatch.setattr(scm, "WORKSPACE_ROOT", root_case)
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with pytest.raises(protocol.ProtocolError, match="run root"):
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scm.workspace_path(signed)
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def test_scm_boundary_rejects_other_repo_branch_and_ordinal(monkeypatch):
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monkeypatch.setattr(scm, "ORDINAL", 0)
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for changes, message in (
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({"repo_url": "https://evil.example/atlas/titan-iac.git"}, "outside Atlas"),
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({"branch": "main"}, "reviewed namespace"),
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):
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signed = protocol.sign_envelope(
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KEY, "assignment", binding(), assignment_payload(**changes)
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)
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with pytest.raises(protocol.ProtocolError, match=message):
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scm._binding(signed)
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signed = protocol.sign_envelope(
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KEY, "assignment", binding(worker_ordinal=1), assignment_payload()
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)
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with pytest.raises(protocol.ProtocolError, match="ordinal"):
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scm._binding(signed)
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def test_scm_git_process_has_no_credential_or_ambient_configuration():
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environment = scm._git_environment()
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assert environment == {
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"HOME": "/nonexistent",
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"PATH": "/usr/bin:/bin",
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"GIT_CONFIG_NOSYSTEM": "1",
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"GIT_TERMINAL_PROMPT": "0",
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}
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assert scm._broker_repo("titan-iac").startswith("http://hermes-scm-broker.")
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source = (SCRIPTS / "execution_pool_scm.py").read_text()
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assert "GITEA_TOKEN" not in source and "GIT_ASKPASS" not in source
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def test_activity_is_bounded_sanitized_and_nofollow(tmp_path):
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text = coordinator.sanitize_activity(
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'route=codex token=super-secret\nAuthorization: Bearer abcdefghijklmnop\n'
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'"refresh_token":"sk-ant-oat01-abcdefghijklmnopqrstuvwxyz"'
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)
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assert "super-secret" not in text
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assert "abcdefghijklmnop" not in text
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assert "abcdefghijklmnopqrstuvwxyz" not in text
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assert len(text.encode()) <= protocol.MAX_ACTIVITY_BYTES
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class FakeKanban:
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@staticmethod
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def worker_log_path(_task, board):
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assert board == "atlas"
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return str(tmp_path / "worker.log")
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envelope = {**binding(), "payload": {"activity": "visible worker activity\n"}}
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coordinator._append_activity(FakeKanban, envelope)
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assert (tmp_path / "worker.log").read_text() == "visible worker activity\n"
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(tmp_path / "worker.log").unlink()
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(tmp_path / "worker.log").symlink_to(tmp_path / "target")
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with pytest.raises(protocol.ProtocolError, match="symlink"):
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coordinator._append_activity(FakeKanban, envelope)
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def _documents(path):
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return [item for item in yaml.safe_load_all(path.read_text()) if item]
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def test_three_node_statefulset_contract_and_cross_worker_isolation():
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stateful = _documents(HERMES / "execution-worker-statefulset.yaml")[0]
|
||
|
|
pod = stateful["spec"]["template"]["spec"]
|
||
|
|
assert stateful["spec"]["replicas"] == 3
|
||
|
|
assert stateful["spec"]["podManagementPolicy"] == "Parallel"
|
||
|
|
assert pod["automountServiceAccountToken"] is False
|
||
|
|
claims = {
|
||
|
|
item["metadata"]["name"]: item
|
||
|
|
for item in stateful["spec"]["volumeClaimTemplates"]
|
||
|
|
}
|
||
|
|
assert set(claims) == {"workspace", "provider-access"}
|
||
|
|
assert all(item["spec"]["accessModes"] == ["ReadWriteOnce"] for item in claims.values())
|
||
|
|
anti = pod["affinity"]["podAntiAffinity"]["requiredDuringSchedulingIgnoredDuringExecution"]
|
||
|
|
assert anti[0]["topologyKey"] == "kubernetes.io/hostname"
|
||
|
|
spread = pod["topologySpreadConstraints"][0]
|
||
|
|
assert spread["whenUnsatisfiable"] == "DoNotSchedule"
|
||
|
|
assert spread["maxSkew"] == 1
|
||
|
|
|
||
|
|
|
||
|
|
def test_worker_placement_prefers_accelerators_and_preserves_exclusions():
|
||
|
|
stateful = _documents(HERMES / "execution-worker-statefulset.yaml")[0]
|
||
|
|
pod = stateful["spec"]["template"]["spec"]
|
||
|
|
assert pod["priorityClassName"] == "scavenger"
|
||
|
|
affinity = stateful["spec"]["template"]["spec"]["affinity"]["nodeAffinity"]
|
||
|
|
terms = affinity["requiredDuringSchedulingIgnoredDuringExecution"]["nodeSelectorTerms"]
|
||
|
|
required = {item["key"]: item for item in terms[0]["matchExpressions"]}
|
||
|
|
assert required["node-role.kubernetes.io/worker"]["values"] == ["true"]
|
||
|
|
excluded = set(required["kubernetes.io/hostname"]["values"])
|
||
|
|
assert {"titan-04", "titan-13", "titan-14", "titan-17", "titan-18", "titan-19", "titan-22", "titan-24"} <= excluded
|
||
|
|
assert affinity["preferredDuringSchedulingIgnoredDuringExecution"][0]["weight"] == 100
|
||
|
|
assert affinity["preferredDuringSchedulingIgnoredDuringExecution"][1]["weight"] == 50
|
||
|
|
worker_container = pod["containers"][0]
|
||
|
|
assert worker_container["resources"] == {
|
||
|
|
"requests": {"cpu": "5m", "memory": "128Mi", "ephemeral-storage": "1Gi"},
|
||
|
|
"limits": {"cpu": "2", "memory": "4Gi", "ephemeral-storage": "8Gi"},
|
||
|
|
}
|
||
|
|
mediators = [
|
||
|
|
item
|
||
|
|
for item in _documents(HERMES / "execution-mediator.yaml")
|
||
|
|
if item["kind"] == "Deployment"
|
||
|
|
]
|
||
|
|
assert all(
|
||
|
|
item["spec"]["template"]["spec"]["containers"][0]["resources"][
|
||
|
|
"requests"
|
||
|
|
]
|
||
|
|
== {"cpu": "2m", "memory": "64Mi"}
|
||
|
|
for item in mediators
|
||
|
|
)
|
||
|
|
|
||
|
|
|
||
|
|
def test_model_worker_has_no_scm_or_cluster_credential_mount():
|
||
|
|
stateful = _documents(HERMES / "execution-worker-statefulset.yaml")[0]
|
||
|
|
pod = stateful["spec"]["template"]
|
||
|
|
containers = {item["name"]: item for item in pod["spec"]["containers"]}
|
||
|
|
worker = containers["execution-worker"]
|
||
|
|
environment = {item["name"] for item in worker["env"]}
|
||
|
|
assert not {"GITEA_TOKEN", "OPENAI_API_KEY", "ANTHROPIC_API_KEY", "KUBECONFIG"} & environment
|
||
|
|
mounts = {item["mountPath"] for item in worker["volumeMounts"]}
|
||
|
|
assert "/vault/secrets" not in mounts
|
||
|
|
assert "/pool-access" not in mounts
|
||
|
|
assert "/provider-access" in mounts
|
||
|
|
assert not any(item["name"] == "vault-auth-token" for item in worker["volumeMounts"])
|
||
|
|
assert pod["metadata"]["annotations"]["vault.hashicorp.com/agent-inject-containers"] == "stage-worker-access"
|
||
|
|
assert set(containers) == {"execution-worker"}
|
||
|
|
assert "execution-pool-key" not in str(pod["metadata"]["annotations"])
|
||
|
|
mediators = [
|
||
|
|
item for item in _documents(HERMES / "execution-mediator.yaml")
|
||
|
|
if item["kind"] == "Deployment"
|
||
|
|
]
|
||
|
|
assert len(mediators) == 3
|
||
|
|
for mediator in mediators:
|
||
|
|
spec = mediator["spec"]["template"]["spec"]
|
||
|
|
assert spec["automountServiceAccountToken"] is False
|
||
|
|
privileged = spec["containers"][0]
|
||
|
|
assert {mount["mountPath"] for mount in privileged["volumeMounts"]} >= {
|
||
|
|
"/pool-access", "/scm-state", "/opt/scm", "/workspace"
|
||
|
|
}
|
||
|
|
assert "/provider-access" not in {
|
||
|
|
mount["mountPath"] for mount in privileged["volumeMounts"]
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
def test_worker_service_account_has_no_kubernetes_permissions():
|
||
|
|
documents = _documents(HERMES / "execution-worker-rbac.yaml")
|
||
|
|
assert len(documents) == 1
|
||
|
|
account = documents[0]
|
||
|
|
assert account["kind"] == "ServiceAccount"
|
||
|
|
assert account["automountServiceAccountToken"] is False
|
||
|
|
|
||
|
|
|
||
|
|
def test_coordinator_remains_single_state_owner_and_workers_do_not_mount_home():
|
||
|
|
agent = _documents(HERMES / "agent-deployment.yaml")[0]
|
||
|
|
assert agent["kind"] == "Deployment"
|
||
|
|
assert agent["spec"]["replicas"] == 1
|
||
|
|
assert agent["spec"]["strategy"]["type"] == "Recreate"
|
||
|
|
assert any(
|
||
|
|
item["name"] == "home"
|
||
|
|
and item["persistentVolumeClaim"]["claimName"] == "hermes-agent-home"
|
||
|
|
for item in agent["spec"]["template"]["spec"]["volumes"]
|
||
|
|
)
|
||
|
|
worker_text = (HERMES / "execution-worker-statefulset.yaml").read_text()
|
||
|
|
assert "hermes-agent-home" not in worker_text
|
||
|
|
assert "kanban.db" not in worker_text
|
||
|
|
|
||
|
|
|
||
|
|
def test_worker_protocol_preserves_switchyard_fallback_and_visible_evidence():
|
||
|
|
source = (SCRIPTS / "execution_pool_worker.py").read_text()
|
||
|
|
coordinator_source = (SCRIPTS / "execution_pool_coordinator.py").read_text()
|
||
|
|
server_source = (SCRIPTS / "execution_pool_server.py").read_text()
|
||
|
|
assert "cli_lane_runner.select_route" in source
|
||
|
|
assert 'alternate = "claude" if route.provider == "codex" else "codex"' in source
|
||
|
|
assert "codex_thread_id" in source and "claude_session_id" in source
|
||
|
|
assert "final_activity" in source
|
||
|
|
assert "worker_ordinal" in coordinator_source and "provider_sessions" in coordinator_source
|
||
|
|
assert "coordinator.reconcile" in server_source
|
||
|
|
|
||
|
|
|
||
|
|
def test_retention_gc_removes_only_clean_terminal_workspace(tmp_path, monkeypatch):
|
||
|
|
monkeypatch.setattr(worker, "ROOT", tmp_path)
|
||
|
|
monkeypatch.setattr(worker, "RETENTION_SECONDS", 3600)
|
||
|
|
workspace = tmp_path / "runs/atlas/t_deadbeef/run-1234"
|
||
|
|
workspace.mkdir(parents=True)
|
||
|
|
subprocess.run(["git", "init", "-q", str(workspace)], check=True)
|
||
|
|
subprocess.run(["git", "-C", str(workspace), "config", "user.email", "test@example.com"], check=True)
|
||
|
|
subprocess.run(["git", "-C", str(workspace), "config", "user.name", "Test"], check=True)
|
||
|
|
(workspace / "tracked").write_text("safe\n")
|
||
|
|
subprocess.run(["git", "-C", str(workspace), "add", "tracked"], check=True)
|
||
|
|
subprocess.run(["git", "-C", str(workspace), "commit", "-qm", "initial"], check=True)
|
||
|
|
state_file = tmp_path / "session-state/atlas/t_deadbeef/run-1234.json"
|
||
|
|
state_file.parent.mkdir(parents=True)
|
||
|
|
state_file.write_text(
|
||
|
|
json.dumps({"terminal_at": time.time() - 7200, "workspace": str(workspace)})
|
||
|
|
)
|
||
|
|
assert worker.garbage_collect() == 1
|
||
|
|
assert not workspace.exists()
|
||
|
|
assert not state_file.exists()
|