1// Copyright 2011 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 28var e = new Error(); 29assertFalse(e.hasOwnProperty('message')); 30Error.prototype.toString = Object.prototype.toString; 31assertEquals("[object Error]", Error.prototype.toString()); 32assertEquals(Object.prototype, Error.prototype.__proto__); 33 34// Check that error construction does not call setters for the 35// properties on error objects in prototypes. 36function fail() { assertTrue(false); }; 37ReferenceError.prototype.__defineSetter__('stack', fail); 38ReferenceError.prototype.__defineSetter__('message', fail); 39ReferenceError.prototype.__defineSetter__('type', fail); 40ReferenceError.prototype.__defineSetter__('arguments', fail); 41var e0 = new ReferenceError(); 42var e1 = new ReferenceError('123'); 43assertTrue(e1.hasOwnProperty('message')); 44assertTrue(e0.hasOwnProperty('stack')); 45assertTrue(e1.hasOwnProperty('stack')); 46assertTrue(e0.hasOwnProperty('type')); 47assertTrue(e1.hasOwnProperty('type')); 48assertTrue(e0.hasOwnProperty('arguments')); 49assertTrue(e1.hasOwnProperty('arguments')); 50 51// Check that the name property on error prototypes is read-only and 52// dont-delete. This is not specified, but allowing overwriting the 53// name property with a getter can leaks error objects from different 54// script tags in the same context in a browser setting. We therefore 55// disallow changes to the name property on error objects. 56assertEquals("ReferenceError", ReferenceError.prototype.name); 57delete ReferenceError.prototype.name; 58assertEquals("ReferenceError", ReferenceError.prototype.name); 59ReferenceError.prototype.name = "not a reference error"; 60assertEquals("ReferenceError", ReferenceError.prototype.name); 61 62// Check that message and name are not enumerable on Error objects. 63var desc = Object.getOwnPropertyDescriptor(Error.prototype, 'name'); 64assertFalse(desc['enumerable']); 65desc = Object.getOwnPropertyDescriptor(Error.prototype, 'message'); 66assertFalse(desc['enumerable']); 67 68var e = new Error("foobar"); 69desc = Object.getOwnPropertyDescriptor(e, 'message'); 70assertFalse(desc['enumerable']); 71desc = Object.getOwnPropertyDescriptor(e, 'arguments'); 72assertFalse(desc['enumerable']); 73desc = Object.getOwnPropertyDescriptor(e, 'type'); 74assertFalse(desc['enumerable']); 75desc = Object.getOwnPropertyDescriptor(e, 'stack'); 76assertFalse(desc['enumerable']); 77 78// name is not tested above, but in addition we should have no enumerable 79// properties, so we simply assert that. 80for (var v in e) { 81 assertUnreachable(); 82} 83