15.2.3.5-01.js - mozsearch

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/*

 * Any copyright is dedicated to the Public Domain.

 * http://creativecommons.org/licenses/publicdomain/

*/

//-----------------------------------------------------------------------------

var BUGNUMBER = 492840;

var summary = 'ES5 Object.create(O [, Properties])';

print(BUGNUMBER + ": " + summary);

/**************

 * BEGIN TEST *

 **************/

assertEq("create" in Object, true);

assertEq(Object.create.length, 2);

var o, desc, props, proto;

o = Object.create(null);

assertEq(Object.getPrototypeOf(o), null, "bad null-proto");

o = Object.create(null, { a: { value: 17, enumerable: false } });

assertEq(Object.getPrototypeOf(o), null, "bad null-proto");

assertEq("a" in o, true);

desc = Object.getOwnPropertyDescriptor(o, "a");

assertEq(desc !== undefined, true, "no descriptor?");

assertEq(desc.value, 17);

assertEq(desc.enumerable, false);

assertEq(desc.configurable, false);

assertEq(desc.writable, false);

props = Object.create({ bar: 15 });

Object.defineProperty(props, "foo", { enumerable: false, value: 42 });

proto = { baz: 12 };

o = Object.create(proto, props);

assertEq(Object.getPrototypeOf(o), proto);

assertEq(Object.getOwnPropertyDescriptor(o, "foo"), undefined);

assertEq("foo" in o, false);

assertEq(Object.getOwnPropertyDescriptor(o, "bar"), undefined);

assertEq("bar" in o, false);

assertEq(Object.getOwnPropertyDescriptor(o, "baz"), undefined);

assertEq(o.baz, 12);

assertEq(o.hasOwnProperty("baz"), false);

try {

  var actual =

    Object.create(Object.create({},

                                { boom: { get: function() { return "base"; }}}),

                  { boom: { get: function() { return "overridden"; }}}).boom

} catch (e) {

assertEq(actual, "overridden");

/******************************************************************************/

reportCompare(true, true);

print("All tests passed!");