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27
28// This regression tests that we are not allowed to overwrite an existing
29// non-configurable getter with a new getter. In addition, we should not
30// be able to change the configurable flag from false to true.
31
32var a = {};
33Object.defineProperty(a, 'b',
34                      { get: function () { return 42; }, configurable: false });
35// Do not allow us to redefine b on a.
36a.__defineGetter__('b', function _b(){ return 'foo'; });
37assertEquals(42, a.b);
38var desc = Object.getOwnPropertyDescriptor(a, 'b');
39assertFalse(desc.configurable);
40