#!/usr/bin/env python3
"""Contract tests for S7-06 canonical shared asset evidence."""

from __future__ import annotations

import hashlib
import json
import sys
import tempfile
import unittest
from pathlib import Path

sys.path.insert(0, str(Path(__file__).resolve().parent))
import generate_resource_intro_graphic_s7_06


ROOT = Path(__file__).resolve().parents[1]
REPORT = ROOT / "coverage/resource-intro-graphic-s7-06.report.json"


class ResourceIntroGraphicS706Tests(unittest.TestCase):
    def test_contract(self) -> None:
        report = json.loads(REPORT.read_text(encoding="utf-8")); self.assertEqual(report["schema"], "resource-intro-graphic-s7-06-report.v1"); self.assertEqual(report["task_id"], "S7-06"); self.assertEqual(report["status"], "verified"); self.assertEqual(report["scope"]["mapping_policy"], "explicit-key-only"); self.assertEqual(report["checks"]["source_generator_basis"]["status"], "verified"); self.assertEqual(report["checks"]["generic_basename_guard"]["status"], "verified"); self.assertTrue(report["checks"]["deterministic_graph"]["state_hash"].startswith("fnv1a64:")); self.assertEqual(report["checks"]["deterministic_graph"]["state_hash"], report["checks"]["deterministic_graph"]["repeated_state_hash"])

    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"}; self.assertEqual(report["report_sha256"], hashlib.sha256(generate_resource_intro_graphic_s7_06.canonical(unsigned).encode()).hexdigest())

    def test_deterministic(self) -> None:
        with tempfile.TemporaryDirectory() as directory:
            first = generate_resource_intro_graphic_s7_06.generate(ROOT, Path(directory) / "one.json"); second = generate_resource_intro_graphic_s7_06.generate(ROOT, Path(directory) / "two.json"); self.assertEqual(first, second)


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