get-own-property-descriptor.js revision e46be819fca9468a0cd4e74859ce0f778eb8ca60
1// Copyright 2010 the V8 project authors. All rights reserved. 2// Redistribution and use in source and binary forms, with or without 3// modification, are permitted provided that the following conditions are 4// met: 5// 6// * Redistributions of source code must retain the above copyright 7// notice, this list of conditions and the following disclaimer. 8// * Redistributions in binary form must reproduce the above 9// copyright notice, this list of conditions and the following 10// disclaimer in the documentation and/or other materials provided 11// with the distribution. 12// * Neither the name of Google Inc. nor the names of its 13// contributors may be used to endorse or promote products derived 14// from this software without specific prior written permission. 15// 16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28function get(){return x} 29function set(x){this.x=x}; 30 31var obj = {x:1}; 32obj.__defineGetter__("accessor", get); 33obj.__defineSetter__("accessor", set); 34 35 36var descIsData = Object.getOwnPropertyDescriptor(obj,'x'); 37assertTrue(descIsData.enumerable); 38assertTrue(descIsData.writable); 39assertTrue(descIsData.configurable); 40 41var descIsAccessor = Object.getOwnPropertyDescriptor(obj, 'accessor'); 42assertTrue(descIsAccessor.enumerable); 43assertTrue(descIsAccessor.configurable); 44assertTrue(descIsAccessor.get == get); 45assertTrue(descIsAccessor.set == set); 46 47var descIsNotData = Object.getOwnPropertyDescriptor(obj, 'not-x'); 48assertTrue(descIsNotData == undefined); 49 50var descIsNotAccessor = Object.getOwnPropertyDescriptor(obj, 'not-accessor'); 51assertTrue(descIsNotAccessor == undefined); 52