| // The property assignments in Array.prototype.sort are strict assignments. |
| |
| load(libdir + "asserts.js"); |
| |
| var a = ["A", , "B", "C", "D"]; |
| var normalArrayElementDesc = Object.getOwnPropertyDescriptor(a, 0); |
| var getterDesc = { |
| get: function () { return "F"; }, |
| set: undefined, |
| enumerable: true, |
| configurable: false |
| }; |
| Object.defineProperty(a, 1, getterDesc); |
| |
| // a.sort is permitted to try to delete a[1] or to try to assign a[1], but it |
| // must try one or the other. Either one will fail, throwing a TypeError. |
| assertThrowsInstanceOf(() => a.sort(), TypeError); |
| |
| // a.sort() is not permitted to delete the nonconfigurable property. |
| assertDeepEq(Object.getOwnPropertyDescriptor(a, 1), getterDesc); |
| |
| // The values left in the other elements of a are unspecified; some or all may |
| // have been deleted. |
| for (var i = 0; i < a.length; i++) { |
| if (i !== 1 && a.hasOwnProperty(i)) { |
| normalArrayElementDesc.value = a[i]; |
| assertDeepEq(Object.getOwnPropertyDescriptor(a, i), normalArrayElementDesc); |
| } |
| } |