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 28var s = 'abcdefghijklmn'; 29assertEquals(s, s.substr()); 30assertEquals(s, s.substr(0)); 31assertEquals(s, s.substr('0')); 32assertEquals(s, s.substr(void 0)); 33assertEquals(s, s.substr(null)); 34assertEquals(s, s.substr(false)); 35assertEquals(s, s.substr(0.9)); 36assertEquals(s, s.substr({ valueOf: function() { return 0; } })); 37assertEquals(s, s.substr({ toString: function() { return '0'; } })); 38 39var s1 = s.substring(1); 40assertEquals(s1, s.substr(1)); 41assertEquals(s1, s.substr('1')); 42assertEquals(s1, s.substr(true)); 43assertEquals(s1, s.substr(1.1)); 44assertEquals(s1, s.substr({ valueOf: function() { return 1; } })); 45assertEquals(s1, s.substr({ toString: function() { return '1'; } })); 46 47 48assertEquals(s.substring(s.length - 1), s.substr(-1)); 49assertEquals(s.substring(s.length - 1), s.substr(-1.2)); 50assertEquals(s.substring(s.length - 1), s.substr(-1.7)); 51assertEquals(s.substring(s.length - 2), s.substr(-2)); 52assertEquals(s.substring(s.length - 2), s.substr(-2.3)); 53assertEquals(s.substring(s.length - 2, s.length - 1), s.substr(-2, 1)); 54assertEquals(s, s.substr(-100)); 55assertEquals('abc', s.substr(-100, 3)); 56assertEquals(s1, s.substr(-s.length + 1)); 57 58// assertEquals('', s.substr(0, void 0)); // smjs and rhino 59assertEquals('abcdefghijklmn', s.substr(0, void 0)); // kjs and v8 60assertEquals('', s.substr(0, null)); 61assertEquals(s, s.substr(0, String(s.length))); 62assertEquals('a', s.substr(0, true)); 63 64 65// Test substrings of different lengths and alignments. 66// First ASCII. 67var x = "ASCII"; 68for (var i = 0; i < 25; i++) { 69 x += (i >> 4).toString(16) + (i & 0x0f).toString(16); 70} 71/x/.exec(x); // Try to force a flatten. 72for (var i = 5; i < 25; i++) { 73 for (var j = 0; j < 25; j++) { 74 var z = x.substring(i, i+j); 75 var w = Math.random() * 42; // Allocate something new in new-space. 76 assertEquals(j, z.length); 77 for (var k = 0; k < j; k++) { 78 assertEquals(x.charAt(i+k), z.charAt(k)); 79 } 80 } 81} 82 83 84// Then two-byte strings. 85x = "UC16\u2028"; // Non-ascii char forces two-byte string. 86for (var i = 0; i < 25; i++) { 87 x += (i >> 4).toString(16) + (i & 0x0f).toString(16); 88} 89/x/.exec(x); // Try to force a flatten. 90for (var i = 5; i < 25; i++) { 91 for (var j = 0; j < 25; j++) { 92 var z = x.substring(i, i + j); 93 var w = Math.random() * 42; // Allocate something new in new-space. 94 assertEquals(j, z.length); 95 for (var k = 0; k < j; k++) { 96 assertEquals(x.charAt(i+k), z.charAt(k)); 97 } 98 } 99} 100 101 102// Keep creating strings to to force allocation failure on substring creation. 103var x = "0123456789ABCDEF"; 104x += x; // 2^5 105x += x; 106x += x; 107x += x; 108x += x; 109x += x; // 2^10 110x += x; 111x += x; 112var xl = x.length; 113var cache = []; 114for (var i = 0; i < 10000; i++) { 115 var z = x.substring(i % xl); 116 assertEquals(xl - (i % xl), z.length); 117 cache.push(z); 118} 119 120 121// Same with two-byte strings 122var x = "\u2028123456789ABCDEF"; 123x += x; // 2^5 124x += x; 125x += x; 126x += x; 127x += x; 128x += x; // 2^10 129x += x; 130x += x; 131var xl = x.length; 132var cache = []; 133for (var i = 0; i < 10000; i++) { 134 var z = x.substring(i % xl); 135 assertEquals(xl - (i % xl), z.length); 136 cache.push(z); 137} 138 139// Substring of substring. 140var cache = []; 141var last = x; 142var offset = 0; 143for (var i = 0; i < 64; i++) { 144 var z = last.substring(i); 145 last = z; 146 cache.push(z); 147 offset += i; 148} 149for (var i = 63; i >= 0; i--) { 150 var z = cache.pop(); 151 assertTrue(/\u2028123456789ABCDEF/.test(z)); 152 assertEquals(xl - offset, z.length); 153 offset -= i; 154} 155