halkyon/packages/halkyon_keys/test/row_ids_test.dart

import 'package:halkyon_keys/halkyon_keys.dart';
import 'package:sodium/sodium_sumo.dart';
import 'package:test/test.dart';

Future<void> main() async {
  final sodium = await SodiumSumoInit.init();

  group('row IDs keyed by the account', () {
    final account = AccountKeys.generate(sodium);
    final secrets = (
      encryption: account.encryption.secretKey.extractBytes(),
      signing: account.signing.secretKey.extractBytes(),
    );

    test('every device of the account names a row alike: its keys, unlocked '
        'anew, give the same ID', () {
      final elsewhere = AccountKeys.fromSecretKeys(
        sodium,
        encryptionSecretKey: secrets.encryption,
        signingSecretKey: secrets.signing,
      );
      expect(
        keyedRowId(sodium, elsewhere, 'train/day/2026-10-30'),
        keyedRowId(sodium, account, 'train/day/2026-10-30'),
      );
    });

    test('another name, or the same name of another account, gives another '
        'ID', () {
      final other = AccountKeys.generate(sodium);
      final id = keyedRowId(sodium, account, 'train/day/2026-10-30');
      expect(keyedRowId(sodium, account, 'train/day/2026-10-31'), isNot(id));
      expect(keyedRowId(sodium, account, 'train/night/2026-10-30'), isNot(id));
      expect(keyedRowId(sodium, other, 'train/day/2026-10-30'), isNot(id));
    });

    test("the ID is a UUID of version 8, RFC 9562's for IDs of one's own "
        'making, and not a name hashed in the open (version 5)', () {
      final id = keyedRowId(sodium, account, 'train/day/2026-10-30');
      expect(
        id,
        matches(
          RegExp(
            '^[0-9a-f]{8}-[0-9a-f]{4}-8[0-9a-f]{3}-[89ab][0-9a-f]{3}-'
            r'[0-9a-f]{12}$',
          ),
        ),
      );
    });

    test('a row without a name has no ID', () {
      expect(() => keyedRowId(sodium, account, ''), throwsArgumentError);
    });
  });
}