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/unshift-nonwritable-length.js	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,61 @@
     1.4 +load(libdir + "asserts.js");
     1.5 +
     1.6 +function f(arr)
     1.7 +{
     1.8 +  assertEq(arr.unshift(3, 5, 7, 9), 8); // if it doesn't throw :-)
     1.9 +}
    1.10 +
    1.11 +var N = 100;
    1.12 +
    1.13 +function test(out)
    1.14 +{
    1.15 +  // Create an array of arrays, to be iterated over for [].unshift-calling.  We
    1.16 +  // can't just loop on unshift on a single array with non-writable length
    1.17 +  // because unshift throws when called on an array with non-writable length.
    1.18 +  var arrs = out.arrs = [];
    1.19 +  for (var i = 0; i < N; i++)
    1.20 +    arrs.push([0, 1, 2, 3]);
    1.21 +
    1.22 +  // Use a much-greater capacity than the eventual non-writable length, just for
    1.23 +  // variability.
    1.24 +  var a = [0, 1, 2, 3, 4, 5, 6, 7];
    1.25 +  Object.defineProperty(a, "length", { writable: false, value: 4 });
    1.26 +
    1.27 +  arrs.push(a);
    1.28 +
    1.29 +  for (var i = 0, sz = arrs.length; i < sz; i++)
    1.30 +    f(arrs[i]);
    1.31 +}
    1.32 +
    1.33 +var obj = {};
    1.34 +assertThrowsInstanceOf(function() { test(obj); }, TypeError);
    1.35 +
    1.36 +var arrs = obj.arrs;
    1.37 +assertEq(arrs.length, N + 1);
    1.38 +for (var i = 0; i < N; i++)
    1.39 +{
    1.40 +  assertEq(arrs[i].length, 8, "unexpected length for arrs[" + i + "]");
    1.41 +  assertEq(arrs[i][0], 3, "bad element for arrs[" + i + "][0]");
    1.42 +  assertEq(arrs[i][1], 5, "bad element for arrs[" + i + "][1]");
    1.43 +  assertEq(arrs[i][2], 7, "bad element for arrs[" + i + "][2]");
    1.44 +  assertEq(arrs[i][3], 9, "bad element for arrs[" + i + "][3]");
    1.45 +  assertEq(arrs[i][4], 0, "bad element for arrs[" + i + "][4]");
    1.46 +  assertEq(arrs[i][5], 1, "bad element for arrs[" + i + "][5]");
    1.47 +  assertEq(arrs[i][6], 2, "bad element for arrs[" + i + "][6]");
    1.48 +  assertEq(arrs[i][7], 3, "bad element for arrs[" + i + "][7]");
    1.49 +}
    1.50 +
    1.51 +var a = arrs[N];
    1.52 +assertEq(a[0], 0, "bad element for a[0]");
    1.53 +assertEq(a[1], 1, "bad element for a[1]");
    1.54 +assertEq(a[2], 2, "bad element for a[2]");
    1.55 +assertEq(a[3], 3, "bad element for a[3]");
    1.56 +assertEq(a.hasOwnProperty(4), false, "shouldn't have added any elements");
    1.57 +assertEq(a[4], undefined);
    1.58 +assertEq(a.hasOwnProperty(5), false, "shouldn't have added any elements");
    1.59 +assertEq(a[5], undefined);
    1.60 +assertEq(a.hasOwnProperty(6), false, "shouldn't have added any elements");
    1.61 +assertEq(a[6], undefined);
    1.62 +assertEq(a.hasOwnProperty(7), false, "shouldn't have added any elements");
    1.63 +assertEq(a[7], undefined);
    1.64 +assertEq(a.length, 4, "length shouldn't have been changed");