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/collections/Array-of-length-setter.js	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,26 @@
     1.4 +// Array.of calls a "length" setter if one is present.
     1.5 +
     1.6 +var hits = 0;
     1.7 +var lastObj = null, lastVal = undefined;
     1.8 +function setter(v) {
     1.9 +    hits++;
    1.10 +    lastObj = this;
    1.11 +    lastVal = v;
    1.12 +}
    1.13 +
    1.14 +// when the setter is on the new object
    1.15 +function Pack() {
    1.16 +    Object.defineProperty(this, "length", {set: setter});
    1.17 +}
    1.18 +Pack.of = Array.of;
    1.19 +var pack = Pack.of("wolves", "cards", "cigarettes", "lies");
    1.20 +assertEq(lastObj, pack);
    1.21 +assertEq(lastVal, 4);
    1.22 +
    1.23 +// when the setter is on the new object's prototype
    1.24 +function Bevy() {}
    1.25 +Object.defineProperty(Bevy.prototype, "length", {set: setter});
    1.26 +Bevy.of = Array.of;
    1.27 +var bevy = Bevy.of("quail");
    1.28 +assertEq(lastObj, bevy);
    1.29 +assertEq(lastVal, 1);