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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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30 "use strict"; | 30 "use strict"; |
31 | 31 |
32 function foo(a, b, c) { | 32 function foo(a, b, c) { |
33 return b; | 33 return b; |
34 } | 34 } |
35 | 35 |
36 var desc = Object.getOwnPropertyDescriptor(foo, 'length'); | 36 var desc = Object.getOwnPropertyDescriptor(foo, 'length'); |
37 assertEquals(3, desc.value); | 37 assertEquals(3, desc.value); |
38 assertFalse(desc.writable); | 38 assertFalse(desc.writable); |
39 assertFalse(desc.enumerable); | 39 assertFalse(desc.enumerable); |
40 assertFalse(desc.configurable); | 40 assertTrue(desc.configurable); |
41 assertThrows(function() { foo.length = 2; }, TypeError); | 41 assertThrows(function() { foo.length = 2; }, TypeError); |
| 42 |
| 43 assertDoesNotThrow(function () { Object.defineProperty(foo, 'length', {value: 4}
); }); |
| 44 assertEquals(4, foo.length); |
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