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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 // Regression test for dart2js that used to remove the a B type check | 5 // Regression test for dart2js that used to remove the a B type check |
6 // after an A type check, because it thought any subtype of A had to be B. | 6 // after an A type check, because it thought any subtype of A had to be B. |
7 | 7 |
8 import "package:expect/expect.dart"; | 8 import "package:expect/expect.dart"; |
9 | 9 |
10 class A { | 10 class A {} |
11 } | |
12 | 11 |
13 class B extends A { | 12 class B extends A {} |
14 } | |
15 | 13 |
16 main() { | 14 main() { |
17 var a = [new A(), new B()]; | 15 var a = [new A(), new B()]; |
18 var b = a[0]; | 16 var b = a[0]; |
19 b = b as A; | 17 b = b as A; |
20 Expect.throws(() => b as B, (e) => e is CastError); | 18 Expect.throws(() => b as B, (e) => e is CastError); |
21 } | 19 } |
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