// Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

/// @assertion If f is marked async, then a fresh instance o implementing the
/// built-in class Future is associated with the invocation and immediately
/// returned to the caller. The body of f is scheduled for execution at some
/// future time. The future o will complete when f terminates. The value used
/// to complete o is the current return value, if it is defined, and the
/// current exception otherwise.
///
/// @description Check that a fresh instance of Future is returned to the
/// caller.
///
/// @author a.semenov@unipro.ru

import 'dart:async';
import '../../../Utils/expect.dart';

Future test() async {
  return 1;
}

main() {
  Set history = new Set.identity();
  for (var i = 0; i < 10; i++) {
    Future f = test();
    Expect.isFalse(history.contains(f));
    history.add(f);
  }
}