"""Synthetic manifests verify the preflight detects tampering, with no large model files."""
from pathlib import Path
import hashlib,json,tempfile,unittest
from verify_assets import check
class InventoryTest(unittest.TestCase):
    def test_manifest_tampering_is_rejected(self):
        with tempfile.TemporaryDirectory() as d:
            root=Path(d);resources=root/'resources';(resources/'text_encoder').mkdir(parents=True);(resources/'video_vae.safetensors').write_bytes(b'encoder fixture')
            (root/'model.safetensors').write_bytes(b'model fixture')
            (root/'config.json').write_text(json.dumps(dict(action_dim=20,chunk_size=32,torch_dtype='bfloat16')))
            (root/'manifest.json').write_text(json.dumps(dict(kind='policy_export',format_version=1,sha256={n:hashlib.sha256((root/n).read_bytes()).hexdigest() for n in ['config.json','model.safetensors']})))
            self.assertTrue(check('flux',root,resources,verify_hashes=True)['hashes_verified'])
            (root/'model.safetensors').write_bytes(b'changed')
            with self.assertRaisesRegex(ValueError,'Manifest hash mismatch'):check('flux',root,resources,verify_hashes=True)
    def test_pi05_requires_checkpoint_norm_stats_not_optimizer(self):
        with tempfile.TemporaryDirectory() as d:
            root=Path(d);(root/'model.safetensors').write_bytes(b'model fixture')
            with self.assertRaisesRegex(ValueError,'norm_stats'):check('pi05',root)
            n=root/'assets/umi_v3/norm_stats.json';n.parent.mkdir(parents=True);n.write_text('{"state":{"mean":[0]},"actions":{"mean":[0]}}')
            self.assertFalse(check('pi05',root)['optimizer_required_for_inference'])
if __name__=='__main__':unittest.main()