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/push-slowly-nonwritable-length.js	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,24 @@
     1.4 +load(libdir + "asserts.js");
     1.5 +
     1.6 +function f(arr, v1, v2)
     1.7 +{
     1.8 +  // Ensure array_push_slowly is called by passing more than one argument.
     1.9 +  arr.push(v1, v2);
    1.10 +}
    1.11 +
    1.12 +function basic()
    1.13 +{
    1.14 +  // Use a much-greater capacity than the eventual non-writable length.
    1.15 +  var a = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
    1.16 +  Object.defineProperty(a, "length", { writable: false, value: 6 });
    1.17 +
    1.18 +  assertThrowsInstanceOf(() => f(a, 8675309, 3141592), TypeError);
    1.19 +
    1.20 +  assertEq(a.hasOwnProperty(6), false);
    1.21 +  assertEq(a[6], undefined);
    1.22 +  assertEq(a.hasOwnProperty(7), false);
    1.23 +  assertEq(a[7], undefined);
    1.24 +  assertEq(a.length, 6);
    1.25 +}
    1.26 +
    1.27 +basic();