1 // Copyright 2012 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 28 // Delete elements of a String object. 29 var TIPLI = "tipli" 30 var so = new String(TIPLI); 31 var length = so.length; 32 33 for (var i = 0; i < length; i++) { 34 assertFalse(delete so[i]); 35 assertThrows("'use strict'; delete so[i];", TypeError); 36 assertFalse(delete so[i.toString()]); 37 assertThrows("'use strict'; delete so[i.toString()];", TypeError); 38 } 39 40 assertEquals(length, so.length); 41 assertEquals(new String(TIPLI), so); 42 43 // Delete elements of an Array. 44 var arr = new Array(length); 45 46 for (var i = 0; i < length; i++) { 47 arr[i] = i; 48 Object.defineProperty(arr, i, { configurable: false }); 49 } 50 51 for (var i = 0; i < length; i++) { 52 assertFalse(delete arr[i]); 53 assertThrows("'use strict'; delete arr[i];", TypeError); 54 assertFalse(delete arr[i.toString()]); 55 assertThrows("'use strict'; delete arr[i.toString()];", TypeError); 56 assertEquals(i, arr[i]); 57 } 58 59 assertEquals(length, arr.length); 60 assertTrue(delete arr[length]); 61 62 // Delete an element of an Object. 63 var INDEX = 28; 64 var obj = new Object(); 65 66 obj[INDEX] = TIPLI; 67 Object.defineProperty(obj, INDEX, { configurable: false }); 68 69 assertFalse(delete obj[INDEX]); 70 assertThrows("'use strict'; delete obj[INDEX];", TypeError); 71 assertFalse(delete obj[INDEX.toString()]); 72 assertThrows("'use strict'; delete obj[INDEX.toString()];", TypeError); 73 assertEquals(TIPLI, obj[INDEX]); 74 assertTrue(delete arr[INDEX+1]); 75
