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