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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, 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 // Test merging streams. | 5 // Test merging streams. |
6 library dart.test.stream_from_iterable; | 6 library dart.test.stream_from_iterable; |
7 | 7 |
8 import "dart:async"; | 8 import "dart:async"; |
9 import '../../../pkg/unittest/lib/unittest.dart'; | 9 import '../../../pkg/unittest/lib/unittest.dart'; |
10 | 10 |
11 // The stopwatch is more precise than the Timer. | 11 // The stopwatch is more precise than the Timer. It can happen that |
| 12 // the TIMEOUT triggers *slightly* too early on the VM. So we add a millisecond |
| 13 // as safetymargin. |
12 // Some browsers (Firefox and IE so far) can trigger too early. So we add more | 14 // Some browsers (Firefox and IE so far) can trigger too early. So we add more |
13 // margin. We use identical(1, 1.0) as an easy way to know if the test is | 15 // margin. We use identical(1, 1.0) as an easy way to know if the test is |
14 // compiled by dart2js. | 16 // compiled by dart2js. |
15 int get safetyMargin => identical(1, 1.0) ? 5 : 0; | 17 int get safetyMargin => identical(1, 1.0) ? 5 : 1; |
16 | 18 |
17 main() { | 19 main() { |
18 test("stream-periodic3", () { | 20 test("stream-periodic3", () { |
19 Stopwatch watch = new Stopwatch()..start(); | 21 Stopwatch watch = new Stopwatch()..start(); |
20 Stream stream = new Stream.periodic(const Duration(milliseconds: 1), | 22 Stream stream = new Stream.periodic(const Duration(milliseconds: 1), |
21 (x) => x); | 23 (x) => x); |
22 stream.take(10).listen((_) { }, onDone: expectAsync0(() { | 24 stream.take(10).listen((_) { }, onDone: expectAsync0(() { |
23 int millis = watch.elapsedMilliseconds + safetyMargin; | 25 int millis = watch.elapsedMilliseconds + safetyMargin; |
24 expect(millis, greaterThan(10)); | 26 expect(millis, greaterThan(10)); |
25 })); | 27 })); |
26 }); | 28 }); |
27 } | 29 } |
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