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-loopy-nonwritable-length.js	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,51 @@
     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 +var N = 100;
    1.13 +
    1.14 +function test(out)
    1.15 +{
    1.16 +  // Create an array of arrays, to be iterated over for [].push-calling.  We
    1.17 +  // can't just loop on push on a single array with non-writable length because
    1.18 +  // push throws when called on an array with non-writable length.
    1.19 +  var arrs = out.arrs = [];
    1.20 +  for (var i = 0; i < N; i++)
    1.21 +    arrs.push([]);
    1.22 +
    1.23 +  // Use a much-greater capacity than the eventual non-writable length.
    1.24 +  var a = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
    1.25 +  Object.defineProperty(a, "length", { writable: false, value: 6 });
    1.26 +
    1.27 +  arrs.push(a);
    1.28 +
    1.29 +  for (var i = 0, sz = arrs.length; i < sz; i++)
    1.30 +  {
    1.31 +    var arr = arrs[i];
    1.32 +    f(arr, 8675309, 3141592);
    1.33 +  }
    1.34 +}
    1.35 +
    1.36 +var obj = {};
    1.37 +
    1.38 +assertThrowsInstanceOf(function() { test(obj); }, TypeError);
    1.39 +
    1.40 +var arrs = obj.arrs;
    1.41 +assertEq(arrs.length, N + 1);
    1.42 +for (var i = 0; i < N; i++)
    1.43 +{
    1.44 +  assertEq(arrs[i].length, 2, "unexpected length for arrs[" + i + "]");
    1.45 +  assertEq(arrs[i][0], 8675309, "bad element for arrs[" + i + "][0]");
    1.46 +  assertEq(arrs[i][1], 3141592, "bad element for arrs[" + i + "][1]");
    1.47 +}
    1.48 +
    1.49 +var a = arrs[N];
    1.50 +assertEq(a.hasOwnProperty(6), false);
    1.51 +assertEq(a[6], undefined);
    1.52 +assertEq(a.hasOwnProperty(7), false);
    1.53 +assertEq(a[7], undefined);
    1.54 +assertEq(a.length, 6);