get-own-property-descriptor.js revision e46be819fca9468a0cd4e74859ce0f778eb8ca60
1e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// Copyright 2010 the V8 project authors. All rights reserved. 2e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// Redistribution and use in source and binary forms, with or without 3e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// modification, are permitted provided that the following conditions are 4e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// met: 5e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// 6e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// * Redistributions of source code must retain the above copyright 7e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// notice, this list of conditions and the following disclaimer. 8e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// * Redistributions in binary form must reproduce the above 9e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// copyright notice, this list of conditions and the following 10e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// disclaimer in the documentation and/or other materials provided 11e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// with the distribution. 12e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// * Neither the name of Google Inc. nor the names of its 13e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// contributors may be used to endorse or promote products derived 14e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// from this software without specific prior written permission. 15e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// 16e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke 28e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarkefunction get(){return x} 29e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarkefunction set(x){this.x=x}; 30e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke 31e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarkevar obj = {x:1}; 32e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarkeobj.__defineGetter__("accessor", get); 33e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarkeobj.__defineSetter__("accessor", set); 34e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke 35e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke 36e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarkevar descIsData = Object.getOwnPropertyDescriptor(obj,'x'); 37e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon ClarkeassertTrue(descIsData.enumerable); 38e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon ClarkeassertTrue(descIsData.writable); 39e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon ClarkeassertTrue(descIsData.configurable); 40e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke 41e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarkevar descIsAccessor = Object.getOwnPropertyDescriptor(obj, 'accessor'); 42e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon ClarkeassertTrue(descIsAccessor.enumerable); 43e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon ClarkeassertTrue(descIsAccessor.configurable); 44e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon ClarkeassertTrue(descIsAccessor.get == get); 45e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon ClarkeassertTrue(descIsAccessor.set == set); 46e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke 47e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarkevar descIsNotData = Object.getOwnPropertyDescriptor(obj, 'not-x'); 48e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon ClarkeassertTrue(descIsNotData == undefined); 49e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke 50e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarkevar descIsNotAccessor = Object.getOwnPropertyDescriptor(obj, 'not-accessor'); 51e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon ClarkeassertTrue(descIsNotAccessor == undefined); 52