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/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
/*
* Any copyright is dedicated to the Public Domain.
*/
var out = {};
function arr() {
return Object.defineProperty([1, 2, 3, 4], 2, {configurable: false});
}
function nonStrict1(out)
{
var a = out.array = arr();
a.length = 2;
}
function strict1(out)
{
"use strict";
var a = out.array = arr();
a.length = 2;
return a;
}
out.array = null;
nonStrict1(out);
assertEq(deepEqual(out.array, [1, 2, 3]), true);
out.array = null;
try
{
strict1(out);
throw "no error";
}
catch (e)
{
assertEq(e instanceof TypeError, true, "expected TypeError, got " + e);
}
assertEq(deepEqual(out.array, [1, 2, 3]), true);
// Internally, SpiderMonkey has two representations for arrays:
// fast-but-inflexible, and slow-but-flexible. Adding a non-index property
// to an array turns it into the latter. We should test on both kinds.
function addx(obj) {
obj.x = 5;
return obj;
}
function nonStrict2(out)
{
var a = out.array = addx(arr());
a.length = 2;
}
function strict2(out)
{
"use strict";
var a = out.array = addx(arr());
a.length = 2;
}
out.array = null;
nonStrict2(out);
assertEq(deepEqual(out.array, addx([1, 2, 3])), true);
out.array = null;
try
{
strict2(out);
throw "no error";
}
catch (e)
{
assertEq(e instanceof TypeError, true, "expected TypeError, got " + e);
}
assertEq(deepEqual(out.array, addx([1, 2, 3])), true);
if (typeof reportCompare === "function")
reportCompare(true, true);
print("Tests complete");