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load(libdir + "asserts.js");
function f(arr)
{
arr.pop();
}
var N = 100;
function test(out)
{
// Create an array of arrays, to be iterated over for [].pop-calling. We
// can't just loop on pop on a single array with non-writable length because
// pop throws when called on an array with non-writable length.
var arrs = out.arrs = [];
for (var i = 0; i < N; i++)
arrs.push([0, 1, 2, 3]);
// Use a much-greater capacity than the eventual non-writable length.
var a = [0, 1, 2, 3, 4, 5, 6, 7];
Object.defineProperty(a, "length", { writable: false, value: 4 });
arrs.push(a);
for (var i = 0, sz = arrs.length; i < sz; i++)
f(arrs[i]);
}
var obj = {};
assertThrowsInstanceOf(function() { test(obj); }, TypeError);
var arrs = obj.arrs;
assertEq(arrs.length, N + 1);
for (var i = 0; i < N; i++)
{
assertEq(arrs[i].length, 3, "unexpected length for arrs[" + i + "]");
assertEq(arrs[i][0], 0, "bad element for arrs[" + i + "][0]");
assertEq(arrs[i][1], 1, "bad element for arrs[" + i + "][1]");
assertEq(arrs[i][2], 2, "bad element for arrs[" + i + "][2]");
assertEq(3 in arrs[i], false, "shouldn't be a third element");
assertEq(arrs[i][3], undefined);
}
var a = arrs[N];
assertEq(a.hasOwnProperty(3), false, "should have been deleted before throw");
assertEq(a[3], undefined);
assertEq(a.length, 4, "length shouldn't have been changed");
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