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/ion-push-nonwritable-length.js	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,61 @@
     1.4 +function f(arr)
     1.5 +{
     1.6 +  assertEq(arr.push(4), 5); // if it doesn't throw :-)
     1.7 +}
     1.8 +
     1.9 +function test(out)
    1.10 +{
    1.11 +  // Create an array of arrays, to be iterated over for [].push-calling.  We
    1.12 +  // can't just loop on push on a single array with non-writable length because
    1.13 +  // push throws when called on an array with non-writable length.
    1.14 +  var arrs = out.arrs = [];
    1.15 +  for (var i = 0; i < 100; i++)
    1.16 +    arrs.push([0, 1, 2, 3]);
    1.17 +
    1.18 +  // Use a much-greater capacity than the eventual non-writable length, so that
    1.19 +  // the inline-push will work.
    1.20 +  var a = [0, 1, 2, 3, 4, 5, 6, 7];
    1.21 +  Object.defineProperty(a, "length", { writable: false, value: 4 });
    1.22 +
    1.23 +  arrs.push(a);
    1.24 +
    1.25 +  for (var i = 0, sz = arrs.length; i < sz; i++)
    1.26 +  {
    1.27 +    var arr = arrs[i];
    1.28 +    f(arr);
    1.29 +  }
    1.30 +}
    1.31 +
    1.32 +var obj = {};
    1.33 +var a, arrs;
    1.34 +
    1.35 +try
    1.36 +{
    1.37 +  test(obj);
    1.38 +  throw new Error("didn't throw!");
    1.39 +}
    1.40 +catch (e)
    1.41 +{
    1.42 +  assertEq(e instanceof TypeError, true, "expected TypeError, got " + e);
    1.43 +
    1.44 +  arrs = obj.arrs;
    1.45 +  assertEq(arrs.length, 101);
    1.46 +  for (var i = 0; i < 100; i++)
    1.47 +  {
    1.48 +    assertEq(arrs[i].length, 5, "unexpected length for arrs[" + i + "]");
    1.49 +    assertEq(arrs[i][0], 0, "bad element for arrs[" + i + "][0]");
    1.50 +    assertEq(arrs[i][1], 1, "bad element for arrs[" + i + "][1]");
    1.51 +    assertEq(arrs[i][2], 2, "bad element for arrs[" + i + "][2]");
    1.52 +    assertEq(arrs[i][3], 3, "bad element for arrs[" + i + "][3]");
    1.53 +    assertEq(arrs[i][4], 4, "bad element for arrs[" + i + "][4]");
    1.54 +  }
    1.55 +
    1.56 +  a = arrs[100];
    1.57 +  assertEq(a[0], 0, "bad element for a[" + i + "]");
    1.58 +  assertEq(a[1], 1, "bad element for a[" + i + "]");
    1.59 +  assertEq(a[2], 2, "bad element for a[" + i + "]");
    1.60 +  assertEq(a[3], 3, "bad element for a[" + i + "]");
    1.61 +  assertEq(a.hasOwnProperty(4), false, "element addition should have thrown");
    1.62 +  assertEq(a[4], undefined);
    1.63 +  assertEq(a.length, 4, "length shouldn't have been changed");
    1.64 +}