string-charcodeat.js revision 1e0659c275bb392c045087af4f6b0d7565cb3d77
1// Copyright 2008 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/** 29 * @fileoverview Check all sorts of borderline cases for charCodeAt. 30 */ 31 32function Cons() { 33 return "Te" + "st testing 123"; 34} 35 36 37function Deep() { 38 var a = "T"; 39 a += "e"; 40 a += "s"; 41 a += "ting testing 123"; 42 return a; 43} 44 45 46function Slice() { 47 return "testing Testing testing 123456789012345".substring(8, 22); 48} 49 50 51function Flat() { 52 return "Testing testing 123"; 53} 54 55function Cons16() { 56 return "Te" + "\u1234t testing 123"; 57} 58 59 60function Deep16() { 61 var a = "T"; 62 a += "e"; 63 a += "\u1234"; 64 a += "ting testing 123"; 65 return a; 66} 67 68 69function Slice16Beginning() { 70 return "Te\u1234t testing testing 123".substring(0, 14); 71} 72 73 74function Slice16Middle() { 75 return "test Te\u1234t testing testing 123".substring(5, 19); 76} 77 78 79function Slice16End() { 80 return "test Te\u1234t".substring(5, 9); 81} 82 83 84function Flat16() { 85 return "Te\u1234ting testing 123"; 86} 87 88 89function Thing() { 90} 91 92 93function NotAString() { 94 var n = new Thing(); 95 n.toString = function() { return "Test"; }; 96 n.charCodeAt = String.prototype.charCodeAt; 97 return n; 98} 99 100 101function NotAString16() { 102 var n = new Thing(); 103 n.toString = function() { return "Te\u1234t"; }; 104 n.charCodeAt = String.prototype.charCodeAt; 105 return n; 106} 107 108 109function TestStringType(generator, sixteen) { 110 var g = generator; 111 var len = g().toString().length; 112 var t = sixteen ? "t" : "f" 113 t += generator.name; 114 assertTrue(isNaN(g().charCodeAt(-1e19)), 1 + t); 115 assertTrue(isNaN(g().charCodeAt(-0x80000001)), 2 + t); 116 assertTrue(isNaN(g().charCodeAt(-0x80000000)), 3 + t); 117 assertTrue(isNaN(g().charCodeAt(-0x40000000)), 4 + t); 118 assertTrue(isNaN(g().charCodeAt(-1)), 5 + t); 119 assertTrue(isNaN(g().charCodeAt(len)), 6 + t); 120 assertTrue(isNaN(g().charCodeAt(len + 1)), 7 + t); 121 assertTrue(isNaN(g().charCodeAt(0x3fffffff)), 8 + t); 122 assertTrue(isNaN(g().charCodeAt(0x7fffffff)), 9 + t); 123 assertTrue(isNaN(g().charCodeAt(0x80000000)), 10 + t); 124 assertTrue(isNaN(g().charCodeAt(1e9)), 11 + t); 125 assertEquals(84, g().charCodeAt(0), 12 + t); 126 assertEquals(84, g().charCodeAt("test"), 13 + t); 127 assertEquals(84, g().charCodeAt(""), 14 + t); 128 assertEquals(84, g().charCodeAt(null), 15 + t); 129 assertEquals(84, g().charCodeAt(undefined), 16 + t); 130 assertEquals(84, g().charCodeAt(), 17 + t); 131 assertEquals(84, g().charCodeAt(void 0), 18 + t); 132 assertEquals(84, g().charCodeAt(false), 19 + t); 133 assertEquals(101, g().charCodeAt(true), 20 + t); 134 assertEquals(101, g().charCodeAt(1), 21 + t); 135 assertEquals(sixteen ? 0x1234 : 115, g().charCodeAt(2), 22 + t); 136 assertEquals(116, g().charCodeAt(3), 23 + t); 137 assertEquals(101, g().charCodeAt(1.1), 24 + t); 138 assertEquals(sixteen ? 0x1234 : 115, g().charCodeAt(2.1718), 25 + t); 139 assertEquals(116, g().charCodeAt(3.14159), 26 + t); 140} 141 142 143TestStringType(Cons, false); 144TestStringType(Deep, false); 145TestStringType(Slice, false); 146TestStringType(Flat, false); 147TestStringType(NotAString, false); 148TestStringType(Cons16, true); 149TestStringType(Deep16, true); 150TestStringType(Slice16Beginning, true); 151TestStringType(Slice16Middle, true); 152TestStringType(Slice16End, true); 153TestStringType(Flat16, true); 154TestStringType(NotAString16, true); 155 156 157function ConsNotSmiIndex() { 158 var str = Cons(); 159 assertTrue(isNaN(str.charCodeAt(0x7fffffff))); 160} 161 162for (var i = 0; i < 100000; i++) { 163 ConsNotSmiIndex(); 164} 165 166 167for (var i = 0; i != 10; i++) { 168 assertEquals(101, Cons16().charCodeAt(1.1)); 169 assertEquals('e', Cons16().charAt(1.1)); 170} 171 172function StupidThing() { 173 // Doesn't return a string from toString! 174 this.toString = function() { return 42; } 175 this.charCodeAt = String.prototype.charCodeAt; 176} 177 178assertEquals(52, new StupidThing().charCodeAt(0), 27); 179assertEquals(50, new StupidThing().charCodeAt(1), 28); 180assertTrue(isNaN(new StupidThing().charCodeAt(2)), 29); 181assertTrue(isNaN(new StupidThing().charCodeAt(-1)), 30); 182 183 184// Medium (>255) and long (>65535) strings. 185 186var medium = "12345678"; 187medium += medium; // 16. 188medium += medium; // 32. 189medium += medium; // 64. 190medium += medium; // 128. 191medium += medium; // 256. 192 193var long = medium; 194long += long + long + long; // 1024. 195long += long + long + long; // 4096. 196long += long + long + long; // 16384. 197long += long + long + long; // 65536. 198 199assertTrue(isNaN(medium.charCodeAt(-1)), 31); 200assertEquals(49, medium.charCodeAt(0), 32); 201assertEquals(56, medium.charCodeAt(255), 33); 202assertTrue(isNaN(medium.charCodeAt(256)), 34); 203 204assertTrue(isNaN(long.charCodeAt(-1)), 35); 205assertEquals(49, long.charCodeAt(0), 36); 206assertEquals(56, long.charCodeAt(65535), 37); 207assertTrue(isNaN(long.charCodeAt(65536)), 38); 208 209 210// Test crankshaft code when the function is set directly on the 211// string prototype object instead of the hidden prototype object. 212// See http://code.google.com/p/v8/issues/detail?id=1070 213 214String.prototype.x = String.prototype.charCodeAt; 215 216function directlyOnPrototype() { 217 assertEquals(97, "a".x(0)); 218 assertEquals(98, "b".x(0)); 219 assertEquals(99, "c".x(0)); 220 assertEquals(97, "a".x(0)); 221 assertEquals(98, "b".x(0)); 222 assertEquals(99, "c".x(0)); 223} 224 225for (var i = 0; i < 10000; i++) { 226 directlyOnPrototype(); 227} 228