| // 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. |
| |
| library timer_test; |
| |
| import 'dart:async'; |
| import 'package:unittest/unittest.dart'; |
| |
| const int STARTTIMEOUT = 1050; |
| const int DECREASE = 200; |
| const int ITERATIONS = 5; |
| |
| Stopwatch stopwatch = new Stopwatch(); |
| int timeout; |
| int iteration; |
| |
| // Some browsers (Firefox and IE so far) can trigger too early. Add a safety |
| // margin. We use identical(1, 1.0) as an easy way to know if the test is |
| // compiled by dart2js. |
| int get safetyMargin => identical(1, 1.0) ? 100 : 0; |
| |
| void timeoutHandler() { |
| expect(stopwatch.elapsedMilliseconds + safetyMargin, |
| greaterThanOrEqualTo(timeout)); |
| if (iteration < ITERATIONS) { |
| iteration++; |
| timeout = timeout - DECREASE; |
| Duration duration = new Duration(milliseconds: timeout); |
| stopwatch.reset(); |
| new Timer(duration, expectAsync(timeoutHandler)); |
| } |
| } |
| |
| main() { |
| test("timeout test", () { |
| iteration = 0; |
| timeout = STARTTIMEOUT; |
| Duration duration = new Duration(milliseconds: timeout); |
| stopwatch.start(); |
| new Timer(duration, expectAsync(timeoutHandler)); |
| }); |
| } |