#!/usr/bin/env python3
"""Contract tests for S8-07 display family metadata."""

from __future__ import annotations

import hashlib
import json
import unittest
from pathlib import Path


ROOT = Path(__file__).resolve().parents[1]
REPORT = ROOT / "coverage/sim-display-families-s8-07.report.json"


class SimDisplayFamiliesS807Tests(unittest.TestCase):
    def test_contract(self) -> None:
        report = json.loads(REPORT.read_text(encoding="utf-8"))
        self.assertEqual(report["schema"], "sim-display-families-s8-07-report.v1")
        self.assertEqual(report["status"], "verified")
        self.assertEqual(report["case_count"], 235)
        self.assertEqual(report["counts"]["axis"], 85)
        self.assertEqual(report["counts"]["qtvcp"], 61)

    def test_self_hash(self) -> None:
        report = json.loads(REPORT.read_text(encoding="utf-8"))
        unsigned = {key: value for key, value in report.items() if key != "report_sha256"}
        canonical = json.dumps(unsigned, ensure_ascii=False, sort_keys=True, separators=(",", ":"))
        self.assertEqual(report["report_sha256"], hashlib.sha256(canonical.encode()).hexdigest())


if __name__ == "__main__":
    unittest.main()