| // Copyright 2011 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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| |
| // This regression tests that we are not allowed to overwrite an existing |
| // non-configurable getter with a new getter. In addition, we should not |
| // be able to change the configurable flag from false to true. |
| |
| var a = {}; |
| Object.defineProperty(a, 'b', |
| { get: function () { return 42; }, configurable: false }); |
| // Do not allow us to redefine b on a. |
| try { |
| a.__defineGetter__('b', function _b(){ return 'foo'; }); |
| } catch (e) {} |
| assertEquals(42, a.b); |
| var desc = Object.getOwnPropertyDescriptor(a, 'b'); |
| assertFalse(desc.configurable); |
