substr.js revision a7e24c173cf37484693b9abb38e494fa7bd7baeb
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 47for (var i = 0; i < s.length; i++) 48 for (var j = i; j < s.length + 5; j++) 49 assertEquals(s.substring(i, j), s.substr(i, j - i)); 50 51assertEquals(s.substring(s.length - 1), s.substr(-1)); 52assertEquals(s.substring(s.length - 1), s.substr(-1.2)); 53assertEquals(s.substring(s.length - 1), s.substr(-1.7)); 54assertEquals(s.substring(s.length - 2), s.substr(-2)); 55assertEquals(s.substring(s.length - 2), s.substr(-2.3)); 56assertEquals(s.substring(s.length - 2, s.length - 1), s.substr(-2, 1)); 57assertEquals(s, s.substr(-100)); 58assertEquals('abc', s.substr(-100, 3)); 59assertEquals(s1, s.substr(-s.length + 1)); 60 61// assertEquals('', s.substr(0, void 0)); // smjs and rhino 62assertEquals('abcdefghijklmn', s.substr(0, void 0)); // kjs and v8 63assertEquals('', s.substr(0, null)); 64assertEquals(s, s.substr(0, String(s.length))); 65assertEquals('a', s.substr(0, true)); 66