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
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 var s = 'abcdefghijklmn';
29 assertEquals(s, s.substr());
30 assertEquals(s, s.substr(0));
31 assertEquals(s, s.substr('0'));
32 assertEquals(s, s.substr(void 0));
33 assertEquals(s, s.substr(null));
34 assertEquals(s, s.substr(false));
35 assertEquals(s, s.substr(0.9));
36 assertEquals(s, s.substr({ valueOf: function() { return 0; } }));
37 assertEquals(s, s.substr({ toString: function() { return '0'; } }));
39 var s1 = s.substring(1);
40 assertEquals(s1, s.substr(1));
41 assertEquals(s1, s.substr('1'));
42 assertEquals(s1, s.substr(true));
43 assertEquals(s1, s.substr(1.1));
44 assertEquals(s1, s.substr({ valueOf: function() { return 1; } }));
45 assertEquals(s1, s.substr({ toString: function() { return '1'; } }));
48 assertEquals(s.substring(s.length - 1), s.substr(-1));
49 assertEquals(s.substring(s.length - 1), s.substr(-1.2));
50 assertEquals(s.substring(s.length - 1), s.substr(-1.7));
51 assertEquals(s.substring(s.length - 2), s.substr(-2));
52 assertEquals(s.substring(s.length - 2), s.substr(-2.3));
53 assertEquals(s.substring(s.length - 2, s.length - 1), s.substr(-2, 1));
54 assertEquals(s, s.substr(-100));
55 assertEquals('abc', s.substr(-100, 3));
56 assertEquals(s1, s.substr(-s.length + 1));
58 // assertEquals('', s.substr(0, void 0)); // smjs and rhino
59 assertEquals('abcdefghijklmn', s.substr(0, void 0)); // kjs and v8
60 assertEquals('', s.substr(0, null));
61 assertEquals(s, s.substr(0, String(s.length)));
62 assertEquals('a', s.substr(0, true));
65 // Test substrings of different lengths and alignments.
68 for (var i = 0; i < 25; i++) {
69 x += (i >> 4).toString(16) + (i & 0x0f).toString(16);
71 /x/.exec(x); // Try to force a flatten.
72 for (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));
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));
102 // Keep creating strings to to force allocation failure on substring creation.
103 var x = "0123456789ABCDEF";
114 for (var i = 0; i < 10000; i++) {
115 var z = x.substring(i % xl);
116 assertEquals(xl - (i % xl), z.length);
121 // Same with two-byte strings
122 var x = "\u2028123456789ABCDEF";
133 for (var i = 0; i < 10000; i++) {
134 var z = x.substring(i % xl);
135 assertEquals(xl - (i % xl), z.length);
139 // Substring of substring.
143 for (var i = 0; i < 64; i++) {
144 var z = last.substring(i);
149 for (var i = 63; i >= 0; i--) {
151 assertTrue(/\u2028123456789ABCDEF/.test(z));
152 assertEquals(xl - offset, z.length);