Todd Turnidge
be3acab294
Improve timer_repeat_test.dart to not totally punt on testing the timing. BUG= R=johnmccutchan@google.com Review URL: https://codereview.chromium.org/1683233003 .
44 lines
1.2 KiB
Dart
44 lines
1.2 KiB
Dart
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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library timer_test;
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import 'dart:async';
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import 'package:unittest/unittest.dart';
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const int STARTTIMEOUT = 1050;
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const int DECREASE = 200;
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const int ITERATIONS = 5;
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Stopwatch stopwatch = new Stopwatch();
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int timeout;
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int iteration;
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// Some browsers (Firefox and IE so far) can trigger too early. Add a safety
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// margin. We use identical(1, 1.0) as an easy way to know if the test is
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// compiled by dart2js.
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int get safetyMargin => identical(1, 1.0) ? 100 : 0;
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void timeoutHandler() {
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expect(stopwatch.elapsedMilliseconds + safetyMargin,
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greaterThanOrEqualTo(timeout));
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if (iteration < ITERATIONS) {
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iteration++;
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timeout = timeout - DECREASE;
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Duration duration = new Duration(milliseconds: timeout);
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stopwatch.reset();
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new Timer(duration, expectAsync(timeoutHandler));
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}
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}
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main() {
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test("timeout test", () {
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iteration = 0;
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timeout = STARTTIMEOUT;
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Duration duration = new Duration(milliseconds: timeout);
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stopwatch.start();
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new Timer(duration, expectAsync(timeoutHandler));
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});
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}
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