1402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// Copyright 2010 the V8 project authors. All rights reserved. 2402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// Redistribution and use in source and binary forms, with or without 3402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// modification, are permitted provided that the following conditions are 4402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// met: 5402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// 6402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// * Redistributions of source code must retain the above copyright 7402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// notice, this list of conditions and the following disclaimer. 8402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// * Redistributions in binary form must reproduce the above 9402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// copyright notice, this list of conditions and the following 10402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// disclaimer in the documentation and/or other materials provided 11402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// with the distribution. 12402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// * Neither the name of Google Inc. nor the names of its 13402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// contributors may be used to endorse or promote products derived 14402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// from this software without specific prior written permission. 15402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// 16402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 28402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// Check that unshifting array of holes keeps the original array 29402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// as array of holes 30402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu(function() { 31402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu var array = new Array(10); 32402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertEquals(13, array.unshift('1st', '2ns', '3rd')); 33402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertTrue(0 in array); 34402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertTrue(1 in array); 35402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertTrue(2 in array); 36402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertFalse(3 in array); 37402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu})(); 38402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 39402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 4025f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen// Check that unshift with no args has a side-effect of 4125f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen// filling the holes with elements from the prototype 42402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// (if present, of course) 43402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu(function() { 44402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu var len = 3; 45402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu var array = new Array(len); 46402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 47402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu var at0 = '@0'; 48402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu var at2 = '@2'; 49402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 50402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu Array.prototype[0] = at0; 51402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu Array.prototype[2] = at2; 52402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 53402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu // array owns nothing... 54402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertFalse(array.hasOwnProperty(0)); 55402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertFalse(array.hasOwnProperty(1)); 56402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertFalse(array.hasOwnProperty(2)); 57402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 58402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu // ... but sees values from Array.prototype 59402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertEquals(array[0], at0); 60402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertEquals(array[1], undefined); 61402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertEquals(array[2], at2); 62402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 63402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertEquals(len, array.unshift()); 64402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 65402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertTrue(delete Array.prototype[0]); 66402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertTrue(delete Array.prototype[2]); 67402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 68402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu // unshift makes array own 0 and 2... 69402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertTrue(array.hasOwnProperty(0)); 70402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertFalse(array.hasOwnProperty(1)); 71402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertTrue(array.hasOwnProperty(2)); 72402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 73402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu // ... so they are not affected be delete. 74402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertEquals(array[0], at0); 75402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertEquals(array[1], undefined); 76402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertEquals(array[2], at2); 77402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu})(); 78402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 79402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 80402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// Now check the case with array of holes and some elements on prototype. 81402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu(function() { 82402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu var len = 9; 83402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu var array = new Array(len); 84402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu Array.prototype[3] = "@3"; 85402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu Array.prototype[7] = "@7"; 86402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 87402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertEquals(len, array.length); 88402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu for (var i = 0; i < array.length; i++) { 89402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertEquals(array[i], Array.prototype[i]); 90402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu } 91402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 92402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertEquals(len + 1, array.unshift('head')); 93402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 94402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertEquals(len + 1, array.length); 95402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu // Note that unshift copies values from prototype into the array. 96402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertEquals(array[4], Array.prototype[3]); 97402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertTrue(array.hasOwnProperty(4)); 98402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 99402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertEquals(array[8], Array.prototype[7]); 100402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertTrue(array.hasOwnProperty(8)); 101402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 102402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu // ... but keeps the rest as holes: 103402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu Array.prototype[5] = "@5"; 104402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertEquals(array[5], Array.prototype[5]); 105402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertFalse(array.hasOwnProperty(5)); 106402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 107402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertEquals(array[3], Array.prototype[3]); 108402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertFalse(array.hasOwnProperty(3)); 109402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 110402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertEquals(array[7], Array.prototype[7]); 111402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertFalse(array.hasOwnProperty(7)); 112402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 113402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertTrue(delete Array.prototype[3]); 114402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertTrue(delete Array.prototype[5]); 115402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertTrue(delete Array.prototype[7]); 116402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu})(); 117402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 11825f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen// Check that unshift with no args has a side-effect of 11925f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen// filling the holes with elements from the prototype 12025f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen// (if present, of course) 12125f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen(function() { 12225f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen var len = 3; 12325f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen var array = new Array(len); 12425f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen 12525f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen var at0 = '@0'; 12625f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen var at2 = '@2'; 12725f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen 12825f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen var array_proto = []; 12925f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen array_proto[0] = at0; 13025f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen array_proto[2] = at2; 13125f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen array.__proto__ = array_proto; 13225f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen 13325f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen // array owns nothing... 13425f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertFalse(array.hasOwnProperty(0)); 13525f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertFalse(array.hasOwnProperty(1)); 13625f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertFalse(array.hasOwnProperty(2)); 13725f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen 13825f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen // ... but sees values from array_proto. 13925f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertEquals(array[0], at0); 14025f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertEquals(array[1], undefined); 14125f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertEquals(array[2], at2); 14225f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen 14325f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertEquals(len, array.unshift()); 14425f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen 14525f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen // unshift makes array own 0 and 2... 14625f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertTrue(array.hasOwnProperty(0)); 14725f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertFalse(array.hasOwnProperty(1)); 14825f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertTrue(array.hasOwnProperty(2)); 14925f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen 15025f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen // ... so they are not affected be delete. 15125f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertEquals(array[0], at0); 15225f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertEquals(array[1], undefined); 15325f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertEquals(array[2], at2); 15425f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen})(); 15525f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen 15625f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen 15725f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen// Now check the case with array of holes and some elements on prototype. 15825f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen(function() { 15925f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen var len = 9; 16025f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen var array = new Array(len); 16125f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen var array_proto = [] 16225f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen array_proto[3] = "@3"; 16325f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen array_proto[7] = "@7"; 16425f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen array.__proto__ = array_proto; 16525f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen 16625f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertEquals(len, array.length); 16725f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen for (var i = 0; i < array.length; i++) { 16825f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertEquals(array[i], array_proto[i]); 16925f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen } 17025f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen 17125f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertEquals(len + 1, array.unshift('head')); 17225f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen 17325f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertEquals(len + 1, array.length); 17425f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen // Note that unshift copies values from prototype into the array. 17525f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertEquals(array[4], array_proto[3]); 17625f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertTrue(array.hasOwnProperty(4)); 17725f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen 17825f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertEquals(array[8], array_proto[7]); 17925f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertTrue(array.hasOwnProperty(8)); 18025f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen 18125f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen // ... but keeps the rest as holes: 18225f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen array_proto[5] = "@5"; 18325f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertEquals(array[5], array_proto[5]); 18425f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertFalse(array.hasOwnProperty(5)); 18525f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen 18625f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertEquals(array[3], array_proto[3]); 18725f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertFalse(array.hasOwnProperty(3)); 18825f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen 18925f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertEquals(array[7], array_proto[7]); 19025f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen assertFalse(array.hasOwnProperty(7)); 19125f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen})(); 19225f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen 193402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu// Check the behaviour when approaching maximal values for length. 194402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu(function() { 195402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu for (var i = 0; i < 7; i++) { 196402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu try { 197402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu new Array((1 << 32) - 3).unshift(1, 2, 3, 4, 5); 198402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu throw 'Should have thrown RangeError'; 199402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu } catch (e) { 200402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertTrue(e instanceof RangeError); 201402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu } 202402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 203402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu // Check smi boundary 204402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu var bigNum = (1 << 30) - 3; 205402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu assertEquals(bigNum + 7, new Array(bigNum).unshift(1, 2, 3, 4, 5, 6, 7)); 206402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu } 207402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu})(); 2086ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 2096ded16be15dd865a9b21ea304d5273c8be299c87Steve Block(function() { 2106ded16be15dd865a9b21ea304d5273c8be299c87Steve Block for (var i = 0; i < 7; i++) { 2116ded16be15dd865a9b21ea304d5273c8be299c87Steve Block var a = [6, 7, 8, 9]; 2126ded16be15dd865a9b21ea304d5273c8be299c87Steve Block a.unshift(1, 2, 3, 4, 5); 2136ded16be15dd865a9b21ea304d5273c8be299c87Steve Block assertEquals([1, 2, 3, 4, 5, 6, 7, 8, 9], a); 2146ded16be15dd865a9b21ea304d5273c8be299c87Steve Block } 2156ded16be15dd865a9b21ea304d5273c8be299c87Steve Block})(); 216