ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 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 | // Flags: --string-slices --expose-externalize-string |
| 29 | |
| 30 | var s = 'abcdefghijklmn'; |
| 31 | assertEquals(s, s.substr()); |
| 32 | assertEquals(s, s.substr(0)); |
| 33 | assertEquals(s, s.substr('0')); |
| 34 | assertEquals(s, s.substr(void 0)); |
| 35 | assertEquals(s, s.substr(null)); |
| 36 | assertEquals(s, s.substr(false)); |
| 37 | assertEquals(s, s.substr(0.9)); |
| 38 | assertEquals(s, s.substr({ valueOf: function() { return 0; } })); |
| 39 | assertEquals(s, s.substr({ toString: function() { return '0'; } })); |
| 40 | |
| 41 | var s1 = s.substring(1); |
| 42 | assertEquals(s1, s.substr(1)); |
| 43 | assertEquals(s1, s.substr('1')); |
| 44 | assertEquals(s1, s.substr(true)); |
| 45 | assertEquals(s1, s.substr(1.1)); |
| 46 | assertEquals(s1, s.substr({ valueOf: function() { return 1; } })); |
| 47 | assertEquals(s1, s.substr({ toString: function() { return '1'; } })); |
| 48 | |
| 49 | |
| 50 | assertEquals(s.substring(s.length - 1), s.substr(-1)); |
| 51 | assertEquals(s.substring(s.length - 1), s.substr(-1.2)); |
| 52 | assertEquals(s.substring(s.length - 1), s.substr(-1.7)); |
| 53 | assertEquals(s.substring(s.length - 2), s.substr(-2)); |
| 54 | assertEquals(s.substring(s.length - 2), s.substr(-2.3)); |
| 55 | assertEquals(s.substring(s.length - 2, s.length - 1), s.substr(-2, 1)); |
| 56 | assertEquals(s, s.substr(-100)); |
| 57 | assertEquals('abc', s.substr(-100, 3)); |
| 58 | assertEquals(s1, s.substr(-s.length + 1)); |
| 59 | |
| 60 | // assertEquals('', s.substr(0, void 0)); // smjs and rhino |
| 61 | assertEquals('abcdefghijklmn', s.substr(0, void 0)); // kjs and v8 |
| 62 | assertEquals('', s.substr(0, null)); |
| 63 | assertEquals(s, s.substr(0, String(s.length))); |
| 64 | assertEquals('a', s.substr(0, true)); |
| 65 | |
| 66 | |
| 67 | // Test substrings of different lengths and alignments. |
| 68 | // First ASCII. |
| 69 | var x = "ASCII"; |
| 70 | for (var i = 0; i < 25; i++) { |
| 71 | x += (i >> 4).toString(16) + (i & 0x0f).toString(16); |
| 72 | } |
| 73 | /x/.exec(x); // Try to force a flatten. |
| 74 | for (var i = 5; i < 25; i++) { |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame^] | 75 | for (var j = 0; j < 25; j++) { |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 76 | var z = x.substring(i, i+j); |
| 77 | var w = Math.random() * 42; // Allocate something new in new-space. |
| 78 | assertEquals(j, z.length); |
| 79 | for (var k = 0; k < j; k++) { |
| 80 | assertEquals(x.charAt(i+k), z.charAt(k)); |
| 81 | } |
| 82 | } |
| 83 | } |
| 84 | // Then two-byte strings. |
| 85 | x = "UC16\u2028"; // Non-ascii char forces two-byte string. |
| 86 | for (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. |
| 90 | for (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 | // Keep creating strings to to force allocation failure on substring creation. |
| 102 | var x = "0123456789ABCDEF"; |
| 103 | x += x; // 2^5 |
| 104 | x += x; |
| 105 | x += x; |
| 106 | x += x; |
| 107 | x += x; |
| 108 | x += x; // 2^10 |
| 109 | x += x; |
| 110 | x += x; |
| 111 | var xl = x.length; |
| 112 | var cache = []; |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame^] | 113 | for (var i = 0; i < 1000; i++) { |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 114 | var z = x.substring(i % xl); |
| 115 | assertEquals(xl - (i % xl), z.length); |
| 116 | cache.push(z); |
| 117 | } |
| 118 | |
| 119 | |
| 120 | // Same with two-byte strings |
| 121 | var x = "\u2028123456789ABCDEF"; |
| 122 | x += x; // 2^5 |
| 123 | x += x; |
| 124 | x += x; |
| 125 | x += x; |
| 126 | x += x; |
| 127 | x += x; // 2^10 |
| 128 | x += x; |
| 129 | x += x; |
| 130 | var xl = x.length; |
| 131 | var cache = []; |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame^] | 132 | for (var i = 0; i < 1000; i++) { |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 133 | var z = x.substring(i % xl); |
| 134 | assertEquals(xl - (i % xl), z.length); |
| 135 | cache.push(z); |
| 136 | } |
| 137 | |
| 138 | // Substring of substring. |
| 139 | var cache = []; |
| 140 | var last = x; |
| 141 | var offset = 0; |
| 142 | for (var i = 0; i < 64; i++) { |
| 143 | var z = last.substring(i); |
| 144 | last = z; |
| 145 | cache.push(z); |
| 146 | offset += i; |
| 147 | } |
| 148 | for (var i = 63; i >= 0; i--) { |
| 149 | var z = cache.pop(); |
| 150 | assertTrue(/\u2028123456789ABCDEF/.test(z)); |
| 151 | assertEquals(xl - offset, z.length); |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame^] | 152 | assertEquals(x.charAt(i*(i+1)/2), z.charAt(0)); |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 153 | offset -= i; |
| 154 | } |
| 155 | |
| 156 | // Test charAt for different strings. |
| 157 | function f(s1, s2, s3, i) { |
| 158 | assertEquals(String.fromCharCode(97+i%11), s1.charAt(i%11)); |
| 159 | assertEquals(String.fromCharCode(97+i%11), s2.charAt(i%11)); |
| 160 | assertEquals(String.fromCharCode(98+i%11), s3.charAt(i%11)); |
| 161 | assertEquals(String.fromCharCode(101), s3.charAt(3)); |
| 162 | } |
| 163 | |
| 164 | flat = "abcdefghijkl12345"; |
| 165 | cons = flat + flat.toUpperCase(); |
| 166 | slice = "abcdefghijklmn12345".slice(1, -1); |
| 167 | for ( var i = 0; i < 1000; i++) { |
| 168 | f(flat, cons, slice, i); |
| 169 | } |
| 170 | flat = "abcdefghijkl1\u20232345"; |
| 171 | cons = flat + flat.toUpperCase(); |
| 172 | slice = "abcdefghijklmn1\u20232345".slice(1, -1); |
| 173 | for ( var i = 0; i < 1000; i++) { |
| 174 | f(flat, cons, slice, i); |
| 175 | } |
| 176 | |
| 177 | // Concatenate substrings. |
| 178 | var ascii = 'abcdefghijklmnop'; |
| 179 | var utf = '\u03B1\u03B2\u03B3\u03B4\u03B5\u03B6\u03B7\u03B8\u03B9\u03BA\u03BB'; |
| 180 | assertEquals("klmno", ascii.substring(10,15) + ascii.substring(16)); |
| 181 | assertEquals("\u03B4\u03B7", utf.substring(3,4) + utf.substring(6,7)); |
| 182 | assertEquals("klp", ascii.substring(10,12) + ascii.substring(15,16)); |
| 183 | assertEquals("\u03B1\u03B4\u03B5", utf.substring(0,1) + utf.substring(5,3)); |
| 184 | assertEquals("", ascii.substring(16) + utf.substring(16)); |
| 185 | assertEquals("bcdef\u03B4\u03B5\u03B6\u03B7\u03B8\u03B9", |
| 186 | ascii.substring(1,6) + utf.substring(3,9)); |
| 187 | assertEquals("\u03B4\u03B5\u03B6\u03B7\u03B8\u03B9abcdefghijklmnop", |
| 188 | utf.substring(3,9) + ascii); |
| 189 | assertEquals("\u03B2\u03B3\u03B4\u03B5\u03B4\u03B5\u03B6\u03B7", |
| 190 | utf.substring(5,1) + utf.substring(3,7)); |
| 191 | |
| 192 | /* |
| 193 | // Externalizing strings. |
| 194 | var a = "123456789qwertyuiopasdfghjklzxcvbnm"; |
| 195 | var b = a.slice(1,-1); |
| 196 | assertEquals(a.slice(1,-1), b); |
| 197 | externalizeString(a); |
| 198 | assertEquals(a.slice(1,-1), b); |
| 199 | */ |