LibTest/async/Timer/Timer.periodic_A02_t01.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 factory Timer.periodic(Duration duration, void callback(Timer timer))
 * A negative duration is treated similar to a duration of 0.
 * @description Checks that negative duration is accepted.
 * @author kaigorodov
 */
import "dart:async";
import "../../../Utils/expect.dart";

check(int delay) {
  int times = 5;
  int count = 0;
  asyncStart();
  new Timer.periodic(durationMs(delay), (Timer timer) {
    count++;
    if (count == times) {
      timer.cancel();
      asyncEnd();
    }
  });
}

main() {
  check(0);
  check(-1);
  check(-10);
}