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1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 library timer_test; | 5 library timer_test; |
6 | 6 |
7 import 'dart:async'; | 7 import 'dart:async'; |
8 import 'package:unittest/unittest.dart'; | 8 import 'package:unittest/unittest.dart'; |
9 | 9 |
10 const int STARTTIMEOUT = 1050; | 10 const int STARTTIMEOUT = 1050; |
11 const int DECREASE = 200; | 11 const int DECREASE = 200; |
12 const int ITERATIONS = 5; | 12 const int ITERATIONS = 5; |
13 | 13 |
14 int startTime; | 14 Stopwatch stopwatch = new Stopwatch(); |
15 int timeout; | 15 int timeout; |
16 int iteration; | 16 int iteration; |
17 | 17 |
18 // Some browsers (Firefox and IE so far) can trigger too early. Add a safety | 18 // Some browsers (Firefox and IE so far) can trigger too early. Add a safety |
19 // margin. We use identical(1, 1.0) as an easy way to know if the test is | 19 // margin. We use identical(1, 1.0) as an easy way to know if the test is |
20 // compiled by dart2js. | 20 // compiled by dart2js. |
21 int get safetyMargin => identical(1, 1.0) ? 100 : 0; | 21 int get safetyMargin => identical(1, 1.0) ? 100 : 0; |
22 | 22 |
23 void timeoutHandler() { | 23 void timeoutHandler() { |
24 int endTime = (new DateTime.now()).millisecondsSinceEpoch; | 24 expect(stopwatch.elapsedMilliseconds + safetyMargin, |
25 expect(endTime - startTime + safetyMargin, greaterThanOrEqualTo(timeout)); | 25 greaterThanOrEqualTo(timeout)); |
26 if (iteration < ITERATIONS) { | 26 if (iteration < ITERATIONS) { |
27 iteration++; | 27 iteration++; |
28 timeout = timeout - DECREASE; | 28 timeout = timeout - DECREASE; |
29 Duration duration = new Duration(milliseconds: timeout); | 29 Duration duration = new Duration(milliseconds: timeout); |
30 startTime = (new DateTime.now()).millisecondsSinceEpoch; | 30 stopwatch.reset(); |
31 new Timer(duration, expectAsync(timeoutHandler)); | 31 new Timer(duration, expectAsync(timeoutHandler)); |
32 } | 32 } |
33 } | 33 } |
34 | 34 |
35 main() { | 35 main() { |
36 test("timeout test", () { | 36 test("timeout test", () { |
37 iteration = 0; | 37 iteration = 0; |
38 timeout = STARTTIMEOUT; | 38 timeout = STARTTIMEOUT; |
39 Duration duration = new Duration(milliseconds: timeout); | 39 Duration duration = new Duration(milliseconds: timeout); |
40 startTime = (new DateTime.now()).millisecondsSinceEpoch; | 40 stopwatch.start(); |
41 new Timer(duration, expectAsync(timeoutHandler)); | 41 new Timer(duration, expectAsync(timeoutHandler)); |
42 }); | 42 }); |
43 } | 43 } |
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