OLD | NEW |
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 import 'native_testing.dart'; | 5 import "package:expect/expect.dart"; |
6 import 'dart:_js_helper' show intTypeCheck; | 6 import 'dart:_js_helper' show intTypeCheck; |
7 | 7 |
8 bool get inCheckedMode { | 8 bool get inCheckedMode { |
9 try { | 9 try { |
10 String a = 42; | 10 String a = 42; |
11 } on TypeError catch (e) { | 11 } on TypeError catch (e) { |
12 return true; | 12 return true; |
13 } | 13 } |
14 return false; | 14 return false; |
15 } | 15 } |
16 | 16 |
17 main() { | 17 main() { |
18 var a = []; | 18 var a = []; |
19 a.add(42); | 19 a.add(42); |
20 a.add('foo'); | 20 a.add('foo'); |
21 // By calling directly [intTypeCheck] with an int, we're making the | 21 // By calling direclty [intTypeCheck] with an int, we're making the |
22 // type inferrer infer that the parameter type of [intTypeCheck] is | 22 // type inferrer infer that the parameter type of [intTypeCheck] is |
23 // always an int, and therefore the method will be compiled to | 23 // always an int, and therefore the method will be compiled to |
24 // never throw. So when the backend actually uses the helper for | 24 // never throw. So when the backend actually uses the helper for |
25 // implementing checked mode semantics (like in the check below), | 25 // implementing checked mode semantics (like in the check below), |
26 // the check won't fail at runtime. | 26 // the check won't fail at runtime. |
27 intTypeCheck(42); | 27 intTypeCheck(42); |
28 if (inCheckedMode) { | 28 if (inCheckedMode) { |
29 int value; | 29 int value; |
30 Expect.throws(() => value = a[1], (e) => e is TypeError); | 30 Expect.throws(() => value = a[1], (e) => e is TypeError); |
31 } | 31 } |
32 } | 32 } |
OLD | NEW |