transaction<T> method

@override Future<T> transaction<T>(Future<T> callback(TransactionContext txn))

Executes a transaction scope.

Manages _inTransaction state and logs lifecycle events (BEGIN, COMMIT, ROLLBACK) to history to verify transaction boundaries.

Implementation

@override
Future<T> transaction<T>(
  Future<T> Function(TransactionContext txn) callback,
) async {
  _inTransaction = true;
  transactionHistory.clear();
  history.add('BEGIN TRANSACTION');

  try {
    final context = MockTransactionContext(this);
    final result = await callback(context);

    history.add('COMMIT');
    _inTransaction = false;
    return result;
  } catch (e) {
    history.add('ROLLBACK');
    _inTransaction = false;
    rethrow;
  }
}