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import json
from dataclasses import replace
import pytest
from ctx.engine.protocol import EngineEvent, HostAction, ScopeRef
from ctx.engine.reducer import reduce
from ctx.engine.state import (
CapabilityEvidence,
CapabilityState,
CommittedPlan,
EngineState,
LeaseRef,
PendingEffect,
PlanCapability,
StateValidationError,
)
def _scope(*, exposure_id: str = "exposure-parent") -> ScopeRef:
return ScopeRef(
tenant_id="tenant-1",
workspace_id="workspace-1",
repository_id="repository-1",
session_id="session-1",
exposure_id=exposure_id,
host_context_id="host-1",
)
def _lease(index: int = 0) -> LeaseRef:
return LeaseRef(
lease_id=f"lease-{index}",
owner_id=f"owner-{index}",
exposure_id="exposure-parent",
)
def _capability(
index: int = 0,
*,
active: bool = True,
leases: tuple[LeaseRef, ...] | None = None,
) -> CapabilityState:
return CapabilityState(
capability_id=f"skill:capability-{index}",
source_digest=f"source-{index}",
plan_id=f"plan-{index}",
catalog_snapshot_id="catalog-1",
leases=(_lease(index),) if leases is None else leases,
activation="active" if active else "inactive",
activation_lease_id=f"lease-{index}" if active else None,
)
def _action(capability: CapabilityState, *, action_id: str = "action-1") -> HostAction:
return HostAction(
action_id=action_id,
kind="PrepareExposure",
scope=_scope(),
precondition_revision=7,
entity_id=capability.capability_id,
source_digest=capability.source_digest,
plan_id=capability.plan_id,
catalog_snapshot_id=capability.catalog_snapshot_id,
lease_id=capability.activation_lease_id,
expires_at="2026-08-01T13:00:00Z",
required_host_feature="activation",
verification={"expected_state": "prepared", "receipt_required": True},
rollback={"kind": "cleanup-prepared-exposure"},
)
def _state() -> EngineState:
capability = _capability()
return EngineState(
revision=7,
scope=_scope(),
host_level="activating",
host_descriptor_digest="host-descriptor-1",
capabilities=(capability,),
pending_effects=(PendingEffect(action=_action(capability), effect="prepare"),),
evidence=(
CapabilityEvidence(
exposure_id="exposure-parent",
capability_id=capability.capability_id,
source_digest=capability.source_digest,
exposure="submitted",
invocation="invoked-succeeded",
),
),
last_manual_bundle=(capability.capability_id,),
)
def test_engine_state_round_trips_as_stable_store_canonical_json() -> None:
state = _state()
encoded = state.to_json()
decoded = EngineState.from_json(encoded)
assert decoded == state
assert decoded.to_dict() == state.to_dict()
assert decoded.to_json() == encoded
assert encoded == json.dumps(
json.loads(encoded),
ensure_ascii=False,
allow_nan=False,
separators=(",", ":"),
sort_keys=True,
)
def test_historical_state_json_remains_byte_stable_without_v3_fields() -> None:
encoded = _state().to_json()
assert "committed_plan" not in encoded
assert "pending_consents" not in encoded
assert "blocked_install_descriptor_digests" not in encoded
assert "install_descriptor_digest" not in encoded
assert "install_plan_digest" not in encoded
assert EngineState.from_json(encoded).to_json() == encoded
def test_unreleased_draft_v3_projection_cannot_enter_the_tagged_v3_codec() -> None:
selection = PlanCapability(
capability_id="skill:remote-testing",
source_digest="a" * 64,
kind="skill",
actionability="install",
install_descriptor_digest="9" * 64,
install_plan_digest="b" * 64,
)
with pytest.raises(StateValidationError, match="CapabilityStateV3"):
EngineState(
revision=3,
scope=_scope(),
host_level="managing",
host_descriptor_digest="c" * 64,
capabilities=(
CapabilityState(
capability_id=selection.capability_id,
source_digest=selection.source_digest,
plan_id="plan-install",
catalog_snapshot_id="d" * 64,
kind=selection.kind,
actionability=selection.actionability,
install_descriptor_digest=selection.install_descriptor_digest,
install_plan_digest=selection.install_plan_digest,
installation="absent",
leases=(_lease(),),
),
),
committed_plan=CommittedPlan(
plan_id="plan-install",
catalog_snapshot_id="d" * 64,
decision_digest="e" * 64,
capabilities=(selection,),
),
install_policy_snapshot_digest="f" * 64,
blocked_install_descriptor_digests=("8" * 64,),
_contract_version=3,
)
def test_nested_state_values_round_trip_through_the_projection() -> None:
state = _state()
data = state.to_dict()
assert LeaseRef.from_dict(data["capabilities"][0]["leases"][0]) == _lease()
assert CapabilityState.from_dict(data["capabilities"][0]) == state.capabilities[0]
assert CapabilityEvidence.from_dict(data["evidence"][0]) == state.evidence[0]
assert PendingEffect.from_dict(data["pending_effects"][0]) == state.pending_effects[0]
assert data["pending_effects"][0]["action"] == _action(state.capabilities[0]).to_dict()
@pytest.mark.parametrize(
("factory", "data"),
[
(LeaseRef.from_dict, {"lease_id": "lease", "owner_id": "owner"}),
(
CapabilityState.from_dict,
{
key: value
for key, value in _state().to_dict()["capabilities"][0].items()
if key != "activation"
},
),
(
CapabilityEvidence.from_dict,
{
**_state().to_dict()["evidence"][0],
"unexpected": True,
},
),
(
PendingEffect.from_dict,
{
**_state().to_dict()["pending_effects"][0],
"unexpected": True,
},
),
(
EngineState.from_dict,
{
**_state().to_dict(),
"unexpected": True,
},
),
],
)
def test_codecs_reject_missing_or_unknown_fields(factory, data) -> None:
with pytest.raises(StateValidationError, match="missing|unknown"):
factory(data)
@pytest.mark.parametrize(
"remove",
[
lambda data: data["scope"].pop("parent_exposure_id"),
lambda data: data["pending_effects"][0]["action"].pop("consent_id"),
lambda data: data["pending_effects"][0]["action"].pop("payload"),
lambda data: data["pending_effects"][0]["action"]["scope"].pop("parent_exposure_id"),
lambda data: data["pending_effects"][0]["action"]["privacy"].pop("retention"),
],
)
def test_projection_rejects_missing_canonical_nested_protocol_fields(remove) -> None:
data = _state().to_dict()
remove(data)
with pytest.raises(StateValidationError, match="missing"):
EngineState.from_dict(data)
@pytest.mark.parametrize(
"mutate",
[
lambda data: data["capabilities"][0].update(activation="made-up"),
lambda data: data["capabilities"][0].update(
activation="inactive", activation_lease_id="lease-0"
),
lambda data: data["capabilities"][0].update(rollback_held=True, rollback_owner_id=None),
lambda data: data["evidence"][0].update(exposure="made-up"),
lambda data: data["evidence"][0].update(invocation="made-up"),
lambda data: data["pending_effects"][0].update(effect="made-up"),
lambda data: data.update(revision=0),
lambda data: data.update(host_level="made-up"),
lambda data: data.update(session_status="made-up"),
lambda data: data.update(host_descriptor_digest=" "),
],
)
def test_projection_rejects_enum_cross_field_and_session_invariants(mutate) -> None:
data = _state().to_dict()
mutate(data)
with pytest.raises(StateValidationError):
EngineState.from_dict(data)
def test_projection_rejects_duplicate_nested_identities() -> None:
for field_name in ("capabilities", "evidence", "pending_effects"):
data = _state().to_dict()
data[field_name].append(data[field_name][0])
with pytest.raises(StateValidationError, match="duplicate"):
EngineState.from_dict(data)
def test_projection_rejects_duplicate_leases_and_dangling_references() -> None:
data = _state().to_dict()
data["capabilities"][0]["leases"].append(data["capabilities"][0]["leases"][0])
with pytest.raises(StateValidationError, match="duplicate.*lease"):
EngineState.from_dict(data)
data = _state().to_dict()
data["evidence"][0]["capability_id"] = "skill:missing"
with pytest.raises(StateValidationError, match="unknown capability"):
EngineState.from_dict(data)
data = _state().to_dict()
second = dict(data["capabilities"][0])
second.update(
capability_id="skill:second",
source_digest="source-second",
plan_id="plan-second",
activation="inactive",
activation_lease_id=None,
)
data["capabilities"].append(second)
data["capabilities"].sort(key=lambda item: item["capability_id"])
with pytest.raises(StateValidationError, match="duplicate.*lease"):
EngineState.from_dict(data)
def test_projection_rejects_action_mismatch_and_duplicate_pending_action_ids() -> None:
data = _state().to_dict()
data["pending_effects"][0]["effect"] = "deactivate"
with pytest.raises(StateValidationError, match="effect|action"):
EngineState.from_dict(data)
data = _state().to_dict()
duplicate = dict(data["pending_effects"][0])
data["pending_effects"].append(duplicate)
with pytest.raises(StateValidationError, match="duplicate.*action"):
EngineState.from_dict(data)
def test_projection_rejects_more_than_five_active_capabilities() -> None:
capabilities = tuple(_capability(index) for index in range(6))
with pytest.raises(StateValidationError, match="five|5"):
EngineState(
revision=1,
scope=_scope(),
host_level="activating",
host_descriptor_digest="host-descriptor-1",
capabilities=capabilities,
)
def test_projection_rejects_noncanonical_json_and_duplicate_keys() -> None:
canonical = _state().to_json()
noncanonical = json.dumps(json.loads(canonical), indent=2, ensure_ascii=False)
with pytest.raises(StateValidationError, match="canonical"):
EngineState.from_json(noncanonical)
duplicate = canonical[:-1] + ',"revision":7}'
with pytest.raises(StateValidationError, match="duplicate"):
EngineState.from_json(duplicate)
def test_projection_rejects_invalid_json_roots_and_bytes() -> None:
for value in ("[]", "not-json", b"\xff"):
with pytest.raises(StateValidationError, match="JSON|UTF-8"):
EngineState.from_json(value)
def test_from_dict_rejects_non_string_mapping_keys_as_state_validation() -> None:
data = _state().to_dict()
data[1] = "not-a-json-object-key" # type: ignore[index]
with pytest.raises(StateValidationError, match="field names"):
EngineState.from_dict(data)
def test_to_json_rejects_constructor_valid_uncommitted_intermediate_state() -> None:
state = _state()
future_action = replace(
state.pending_effects[0].action,
precondition_revision=state.revision + 1,
)
intermediate = replace(
state,
pending_effects=(PendingEffect(action=future_action, effect="prepare"),),
)
with pytest.raises(StateValidationError, match="persisted.*revision"):
intermediate.to_json()
def test_committed_reducer_output_round_trips_through_state_codec() -> None:
state, _ = reduce(
None,
EngineEvent(
event_id="codec-start",
kind="SessionStarted",
scope=_scope(),
expected_revision=0,
occurred_at="2026-08-01T12:00:00Z",
payload={"host_level": "activating"},
correlation_id="plan-start",
engine_version="engine-v1",
planner_version="planner-v1",
policy_version="policy-v1",
host_descriptor_digest="host-descriptor-1",
catalog_snapshot_digest="catalog-1",
semantic_model_digest="model-v1",
semantic_index_digest="index-v1",
work_signature="work-v1",
random_seed=7,
),
)
state, _ = reduce(
state,
EngineEvent(
event_id="codec-desired",
kind="ReassessmentRequested",
scope=_scope(),
expected_revision=state.revision,
occurred_at="2026-08-01T12:00:01Z",
payload={
"owner_id": "owner-0",
"desired_capabilities": [
{
"capability_id": "skill:capability-0",
"source_digest": "source-0",
"lease_id": "lease-0",
}
],
},
correlation_id="plan-0",
engine_version="engine-v1",
planner_version="planner-v1",
policy_version="policy-v1",
host_descriptor_digest="host-descriptor-1",
catalog_snapshot_digest="catalog-1",
semantic_model_digest="model-v1",
semantic_index_digest="index-v1",
work_signature="work-v1",
random_seed=7,
),
)
assert EngineState.from_json(state.to_json()) == state
|