LibTest/core/Stopwatch/start_A01_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 void start()
/// Starts the [Stopwatch].
/// The [elapsed] count is increasing monotonically.
/// If the [Stopwatch] has been stopped, then calling start again restarts it
/// without resetting the elapsed count.
/// If the [Stopwatch] is currently running, then calling start does nothing.
/// @description Checks that calling this method on a stopwatch that wasn't
/// previously running starts it, causing the elapsed count to increase.
/// @author kaigorodov

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

Duration delay = durationInMilliseconds(50);
Stopwatch sw = new Stopwatch();
int e0 = 0;

main() {
  sw.start();
  e0 = sw.elapsedTicks;
  asyncStart();
  new Timer(delay, proc1);
}

void proc1() {
  int e1 = sw.elapsedTicks;
  Expect.isTrue(e1 > e0);
  asyncEnd();
}