1 // Copyright 2011 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
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.
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.
28 // Flags: --expose-externalize-string --allow-natives-syntax
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'; } }));
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'; } }));
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));
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));
67 // Test substrings of different lengths and alignments.
70 for (var i = 0; i < 25; i++) {
71 x += (i >> 4).toString(16) + (i & 0x0f).toString(16);
73 /x/.exec(x); // Try to force a flatten.
74 for (var i = 5; i < 25; i++) {
75 for (var j = 0; j < 25; j++) {
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));
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);
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));
101 // Keep creating strings to to force allocation failure on substring creation.
102 var x = "0123456789ABCDEF";
103 for (var i = 0; i < 8; i++) x += x;
106 for (var i = 0; i < 1000; i++) {
107 var z = x.substring(i % xl);
108 assertEquals(xl - (i % xl), z.length);
113 // Same with two-byte strings
114 var x = "\u2028123456789ABCDEF";
115 for (var i = 0; i < 8; i++) x += x;
118 for (var i = 0; i < 1000; i++) {
119 var z = x.substring(i % xl);
120 assertEquals(xl - (i % xl), z.length);
124 // Substring of substring.
128 for (var i = 0; i < 64; i++) {
129 var z = last.substring(i);
134 for (var i = 63; i >= 0; i--) {
136 assertTrue(/\u2028123456789ABCDEF/.test(z));
137 assertEquals(xl - offset, z.length);
138 assertEquals(x.charAt(i*(i+1)/2), z.charAt(0));
142 // Test charAt for different strings.
143 function f(s1, s2, s3, i) {
144 assertEquals(String.fromCharCode(97+i%11), s1.charAt(i%11));
145 assertEquals(String.fromCharCode(97+i%11), s2.charAt(i%11));
146 assertEquals(String.fromCharCode(98+i%11), s3.charAt(i%11));
147 assertEquals(String.fromCharCode(101), s3.charAt(3));
150 flat = "abcdefghijkl12345";
151 cons = flat + flat.toUpperCase();
152 slice = "abcdefghijklmn12345".slice(1, -1);
153 for ( var i = 0; i < 1000; i++) {
154 f(flat, cons, slice, i);
156 flat = "abcdefghijkl1\u20232345";
157 cons = flat + flat.toUpperCase();
158 slice = "abcdefghijklmn1\u20232345".slice(1, -1);
159 for ( var i = 0; i < 1000; i++) {
160 f(flat, cons, slice, i);
164 flat = "abcdefghijkl12345";
165 cons = flat + flat.toUpperCase();
166 /x/.exec(cons); // Flatten cons
167 slice = "abcdefghijklmn12345".slice(1, -1);
168 assertEquals("cdefg", flat.substr(2, 5));
169 assertEquals("cdefg", cons.substr(2, 5));
170 assertEquals("cdefg", slice.substr(1, 5));
172 flat = "abc\u1234defghijkl12345";
173 cons = flat + flat.toUpperCase();
174 /x/.exec(cons); // Flatten cons
175 slice = "abc\u1234defghijklmn12345".slice(1, -1);
176 assertEquals("c\u1234def", flat.substr(2, 5));
177 assertEquals("c\u1234def", cons.substr(2, 5));
178 assertEquals("c\u1234def", slice.substr(1, 5));
180 // Concatenate substrings.
181 var ascii = 'abcdefghijklmnop';
182 var utf = '\u03B1\u03B2\u03B3\u03B4\u03B5\u03B6\u03B7\u03B8\u03B9\u03BA\u03BB';
183 assertEquals("klmno", ascii.substring(10,15) + ascii.substring(16));
184 assertEquals("\u03B4\u03B7", utf.substring(3,4) + utf.substring(6,7));
185 assertEquals("klp", ascii.substring(10,12) + ascii.substring(15,16));
186 assertEquals("\u03B1\u03B4\u03B5", utf.substring(0,1) + utf.substring(5,3));
187 assertEquals("", ascii.substring(16) + utf.substring(16));
188 assertEquals("bcdef\u03B4\u03B5\u03B6\u03B7\u03B8\u03B9",
189 ascii.substring(1,6) + utf.substring(3,9));
190 assertEquals("\u03B4\u03B5\u03B6\u03B7\u03B8\u03B9abcdefghijklmnop",
191 utf.substring(3,9) + ascii);
192 assertEquals("\u03B2\u03B3\u03B4\u03B5\u03B4\u03B5\u03B6\u03B7",
193 utf.substring(5,1) + utf.substring(3,7));
195 // Externalizing strings.
196 var a = "123456789" + "qwertyuiopasdfghjklzxcvbnm";
197 var b = "23456789qwertyuiopasdfghjklzxcvbn"
198 assertEquals(a.slice(1,-1), b);
200 assertTrue(isOneByteString(a));
201 externalizeString(a, true);
202 assertFalse(isOneByteString(a));
204 assertEquals(a.slice(1,-1), b);
205 assertTrue(/3456789qwe/.test(a));
206 assertEquals(5, a.indexOf("678"));
207 assertEquals("12345", a.split("6")[0]);
209 // Create a slice with an external string as parent string.
210 var c = a.slice(1,-1);
212 function test_crankshaft() {
213 for (var i = 0; i < 20; i++) {
214 assertEquals(b.charAt(i), a.charAt(i + 1));
215 assertEquals(b.charAt(i), c.charAt(i));
216 assertEquals(b.charAt(4), c.charAt(4));
217 assertTrue(/3456789qwe/.test(c));
218 assertEquals(4, c.indexOf("678"));
219 assertEquals("2345", c.split("6")[0]);
224 %OptimizeFunctionOnNextCall(test_crankshaft);
227 var s1 = "12345678901234567890";
228 var s2 = "abcdefghijklmnopqrstuvwxyz";
230 var c2 = s1 + c1 + s2;
231 assertEquals("234567890123456789", c1.substring(1, 19));
232 assertEquals("bcdefghijklmno", c1.substring(21, 35));
233 assertEquals("2345678901234567890abcdefghijklmno", c1.substring(1, 35));
234 assertEquals("234567890123456789", c2.substring(1, 19));
235 assertEquals("bcdefghijklmno", c2.substring(41, 55));
236 assertEquals("2345678901234567890abcdefghijklmno", c2.substring(21, 55));