LibTest/async/Future/wait_A01_t07.dart

/*
 * Copyright (c) 2011, 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  Future<List> wait(Iterable<Future> futures)
 * Wait for all the given futures to complete and collect their values.
 * Returns a future which will complete once all the futures in a list are complete.
 * @description Checks that the returned future completes with correct value
 * if futures in a list are chained.
 * @author ilya
 */
import "dart:async";
import "../../../Utils/async_utils.dart";
import "../../../Utils/expect.dart";

inc(x) => x+1;

main() {
  var f1 = new Future.delayed(new Duration(milliseconds:100), () => 1);
  var f2 = f1.then(inc);
  var f3 = f2.then(inc);
  var f4 = f3.then(inc);
  var f5 = f4.then(inc);

  asyncStart();
  Future.wait([f5,f4,f3,f2,f1]).then((value) {
    Expect.listEquals([5,4,3,2,1], value);
    asyncEnd();
  });
}