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Python

from __future__ import annotations
import json
from pathlib import Path
import pytest
from yovision_brain.events import INTERNAL_EVENT_SCHEMA, InternalEventCandidate
from yovision_brain.integration.event_export import EventExportError, canonical_json, export_event, payload_sha256
ROOT = Path(__file__).resolve().parents[4]
def _candidate(**changes: object) -> InternalEventCandidate:
values: dict[str, object] = {
"schema": INTERNAL_EVENT_SCHEMA,
"event_id": "evt-area-20260831-0001",
"logical_input_id": "camera-east-gate",
"event_type": "danger_area_entered",
"occurred_at_ns": 1_788_134_401_125_000_000,
"rule_id": "rule-east-danger",
"rule_version": "3",
"model_name": "anonymous-detector",
"model_version": "2026.08",
"profile_id": "profile-main-stream",
"frame_width": 100,
"frame_height": 100,
"track_id": "track-0042",
"observation": {
"category": "anonymous_target",
"confidence": 0.93,
"box": {"left": 12, "top": 20, "right": 31, "bottom": 74},
"anchor": {"x": 0.21, "y": 0.74},
},
"reason": "entered polygon",
}
values.update(changes)
return InternalEventCandidate(**values) # type: ignore[arg-type]
def _fixture(relative: str) -> dict[str, object]:
return json.loads((ROOT / relative).read_text(encoding="utf-8"))
def test_brain_mapper_matches_frozen_producer_fixture_and_jcs_digest() -> None:
pending = _fixture("contracts/evidence/v1/examples/pending.json")
expected = _fixture("contracts/events/v1/examples/dangerous-area.json")
event = export_event(
_candidate(),
producer_id="brain-school-a",
site_ref="site-school-a",
severity="high",
evidence=[pending],
region_ref="region-east-danger",
)
assert event == expected
assert payload_sha256(event) == "4cc1e93820195caf713ea675ff33f178c9d4997dd8a81cb61287e9fea0e3d5e1"
def test_retry_mapping_preserves_original_identity_and_payload() -> None:
candidate = _candidate()
arguments = {
"producer_id": "brain-school-a",
"site_ref": "site-school-a",
"severity": "high",
"evidence": [_fixture("contracts/evidence/v1/examples/pending.json")],
"region_ref": "region-east-danger",
}
first = export_event(candidate, **arguments)
retry = export_event(candidate, **arguments)
assert (first["producer_id"], first["source_event_id"]) == (
"brain-school-a",
candidate.event_id,
)
assert retry == first
assert payload_sha256(retry) == payload_sha256(first)
@pytest.mark.parametrize("fixture", ["pending.json", "failed.json"])
def test_evidence_degradation_states_are_exported_unchanged(fixture: str) -> None:
evidence = _fixture(f"contracts/evidence/v1/examples/{fixture}")
candidate = _candidate()
if fixture == "failed.json":
candidate = _candidate(
event_id="evt-line-20260831-0002",
logical_input_id="camera-north-corridor",
event_type="directional_line_crossed",
occurred_at_ns=1_788_134_590_000_000_000,
rule_id="rule-north-one-way",
rule_version="1",
track_id="track-0088",
observation={"category": "anonymous_target", "confidence": 0.88},
)
event = export_event(
candidate,
producer_id="brain-school-a",
site_ref="site-school-a",
severity="medium" if fixture == "failed.json" else "high",
evidence=[evidence],
region_ref="line-north-one-way" if fixture == "failed.json" else "region-east-danger",
crossing_direction="b_to_a" if fixture == "failed.json" else None,
)
assert event["evidence"] == [evidence]
@pytest.mark.parametrize(
"unsafe",
[
{"local_path": "D:/captures/frame.jpg"},
{"url": "https://example.invalid/signed"},
{"token": "not-a-real-token"},
],
)
def test_evidence_rejects_paths_urls_and_sensitive_fields(unsafe: dict[str, object]) -> None:
evidence = _fixture("contracts/evidence/v1/examples/pending.json")
evidence.update(unsafe)
with pytest.raises(EventExportError, match="forbidden"):
export_event(
_candidate(),
producer_id="brain-school-a",
site_ref="site-school-a",
severity="high",
evidence=[evidence],
region_ref="region-east-danger",
)
def test_failed_evidence_cannot_claim_success_content() -> None:
evidence = _fixture("contracts/evidence/v1/examples/failed.json")
evidence["content_type"] = "video/mp4"
with pytest.raises(EventExportError, match="failed evidence"):
export_event(
_candidate(),
producer_id="brain-school-a",
site_ref="site-school-a",
severity="high",
evidence=[evidence],
region_ref="region-east-danger",
)
def test_jcs_normalizes_number_lexemes_and_negative_zero() -> None:
assert canonical_json({"small": 1e-7, "fixed": 1e20, "zero": -0.0}) == (
'{"fixed":100000000000000000000,"small":1e-7,"zero":0}'
)