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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 = 'mutation-prevention-methods.js';
//-----------------------------------------------------------------------------
var BUGNUMBER = 492849;
var summary = 'Object.is{Sealed,Frozen}, Object.{seal,freeze}';
print(BUGNUMBER + ": " + summary);
/**************
* BEGIN TEST *
**************/
// Empty object
var o1 = {};
assertEq(Object.isExtensible(o1), true);
assertEq(Object.isSealed(o1), false);
assertEq(Object.isFrozen(o1), false);
Object.preventExtensions(o1);
// An non-extensible empty object has no properties, so it is vacuously sealed
// and frozen.
assertEq(Object.isExtensible(o1), false);
assertEq(Object.isSealed(o1), true);
assertEq(Object.isFrozen(o1), true);
// Object with a data property
var o2 = { 1: 2 };
assertEq(Object.isExtensible(o2), true);
assertEq(Object.isSealed(o2), false);
assertEq(Object.isFrozen(o2), false);
Object.preventExtensions(o2);
assertEq(Object.isExtensible(o2), false);
assertEq(Object.isSealed(o2), false);
assertEq(Object.isFrozen(o2), false);
Object.seal(o2);
assertEq(Object.isExtensible(o2), false);
assertEq(Object.isSealed(o2), true);
assertEq(Object.isFrozen(o2), false);
assertEq(o2[1], 2);
var desc;
desc = Object.getOwnPropertyDescriptor(o2, "1");
assertEq(typeof desc, "object");
assertEq(desc.enumerable, true);
assertEq(desc.configurable, false);
assertEq(desc.value, 2);
assertEq(desc.writable, true);
o2[1] = 17;
assertEq(o2[1], 17);
desc = Object.getOwnPropertyDescriptor(o2, "1");
assertEq(typeof desc, "object");
assertEq(desc.enumerable, true);
assertEq(desc.configurable, false);
assertEq(desc.value, 17);
assertEq(desc.writable, true);
Object.freeze(o2);
assertEq(o2[1], 17);
desc = Object.getOwnPropertyDescriptor(o2, "1");
assertEq(typeof desc, "object");
assertEq(desc.enumerable, true);
assertEq(desc.configurable, false);
assertEq(desc.value, 17);
assertEq(desc.writable, false);
// Object with an accessor property
var o3 = { get foo() { return 17; } };
assertEq(Object.isExtensible(o3), true);
assertEq(Object.isSealed(o3), false);
assertEq(Object.isFrozen(o3), false);
Object.preventExtensions(o3);
assertEq(Object.isExtensible(o3), false);
assertEq(Object.isSealed(o3), false);
assertEq(Object.isFrozen(o3), false);
Object.seal(o3);
// An accessor property in a sealed object is unchanged if that object is
// frozen, so a sealed object containing only accessor properties is also
// vacuously frozen.
assertEq(Object.isExtensible(o3), false);
assertEq(Object.isSealed(o3), true);
assertEq(Object.isFrozen(o3), true);
Object.freeze(o3);
assertEq(Object.isExtensible(o3), false);
assertEq(Object.isSealed(o3), true);
assertEq(Object.isFrozen(o3), true);
/******************************************************************************/
reportCompare(true, true);
print("All tests passed!");
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