import json
import unittest
from pathlib import Path


class KinematicsNumericPolicyTests(unittest.TestCase):
    def test_policy_is_verified_and_exact_fields_are_declared(self):
        root = Path(__file__).resolve().parents[1]
        report = json.loads((root / "coverage/kinematics-numeric-policy.json").read_text(encoding="utf-8"))
        self.assertEqual(report["schema"], "kinematics-numeric-policy.v1")
        self.assertEqual(report["status"], "verified")
        self.assertFalse(report["compiler"]["fast_math"])
        self.assertIn("SIM_KIN_ERR_SINGULAR", {row["expected"] for row in report["boundary_matrix"]})
        self.assertIn("branch_id", report["exact_fields"])


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