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/*
* Any copyright is dedicated to the Public Domain.
* http://creativecommons.org/licenses/publicdomain/
* Contributor:
* Jeff Walden <jwalden+code@mit.edu>
*/
var gTestfile = '15.2.3.10-01.js';
//-----------------------------------------------------------------------------
var BUGNUMBER = 492849;
var summary = 'ES5: Implement Object.preventExtensions, Object.isExtensible';
print(BUGNUMBER + ": " + summary);
/**************
* BEGIN TEST *
**************/
function trySetProperty(o, p, v, strict)
{
function strictSetProperty()
{
"use strict";
o[p] = v;
}
function setProperty()
{
o[p] = v;
}
assertEq(Object.prototype.hasOwnProperty.call(o, p), false);
try
{
if (strict)
strictSetProperty();
else
setProperty();
if (o[p] === v)
return "set";
if (p in o)
return "set-converted";
return "swallowed";
}
catch (e)
{
return "throw";
}
}
function tryDefineProperty(o, p, v)
{
assertEq(Object.prototype.hasOwnProperty.call(o, p), false);
try
{
Object.defineProperty(o, p, { value: v });
if (o[p] === v)
return "set";
if (p in o)
return "set-converted";
return "swallowed";
}
catch (e)
{
return "throw";
}
}
assertEq(typeof Object.preventExtensions, "function");
assertEq(Object.preventExtensions.length, 1);
var slowArray = [1, 2, 3];
slowArray.slow = 5;
var objs =
[{}, { 1: 2 }, { a: 3 }, [], [1], [, 1], slowArray, function a(){}, /a/];
for (var i = 0, sz = objs.length; i < sz; i++)
{
var o = objs[i];
assertEq(Object.isExtensible(o), true, "object " + i + " not extensible?");
var o2 = Object.preventExtensions(o);
assertEq(o, o2);
assertEq(Object.isExtensible(o), false, "object " + i + " is extensible?");
assertEq(trySetProperty(o, "baz", 17, true), "throw",
"unexpected behavior for strict-mode property-addition to " +
"object " + i);
assertEq(trySetProperty(o, "baz", 17, false), "swallowed",
"unexpected behavior for property-addition to object " + i);
assertEq(tryDefineProperty(o, "baz", 17), "throw",
"unexpected behavior for new property definition on object " + i);
}
/******************************************************************************/
reportCompare(true, true);
print("All tests passed!");
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