/* * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. *//** * Basic checks for Object.seal and Object.freeze. * * @test * @run */var obj = { num: Math.E };print("sealed? " + Object.isSealed(obj));print("frozen? " + Object.isFrozen(obj));Object.seal(obj);print("sealed? " + Object.isSealed(obj));// delete should fail - because we have sealedprint("deleted num? " + (delete obj.num));print("num = " + obj.num);// assignment should succeedprint("assign PI to num");obj.num = Math.PI;print("num = " + obj.num);// assignment should fail -- because we freezeObject.freeze(obj);print("frozen? " + Object.isFrozen(obj));print("assign 1729 to num");obj.num = 1729;print("num = " + obj.num);