The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/js/src/jit-test/tests/arrays/sort-getter-only.js	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,29 @@
     1.4 +// The property assignments in Array.prototype.sort are strict assignments.
     1.5 +
     1.6 +load(libdir + "asserts.js");
     1.7 +
     1.8 +var a = ["A", , "B", "C", "D"];
     1.9 +var normalArrayElementDesc = Object.getOwnPropertyDescriptor(a, 0);
    1.10 +var getterDesc = {
    1.11 +    configurable: false,
    1.12 +    enumerable: true,
    1.13 +    get: function () { return "F"; },
    1.14 +    set: undefined
    1.15 +};
    1.16 +Object.defineProperty(a, 1, getterDesc);
    1.17 +
    1.18 +// a.sort is permitted to try to delete a[1] or to try to assign a[1], but it
    1.19 +// must try one or the other. Either one will fail, throwing a TypeError.
    1.20 +assertThrowsInstanceOf(() => a.sort(), TypeError);
    1.21 +
    1.22 +// a.sort() is not permitted to delete the nonconfigurable property.
    1.23 +assertDeepEq(Object.getOwnPropertyDescriptor(a, 1), getterDesc);
    1.24 +
    1.25 +// The values left in the other elements of a are unspecified; some or all may
    1.26 +// have been deleted.
    1.27 +for (var i = 0; i < a.length; i++) {
    1.28 +    if (i !== 1 && a.hasOwnProperty(i)) {
    1.29 +        normalArrayElementDesc.value = a[i];
    1.30 +        assertDeepEq(Object.getOwnPropertyDescriptor(a, i), normalArrayElementDesc);
    1.31 +    }
    1.32 +}