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 // Test the (deprecated as of JS 1.5) properties of the RegExp function. 29 var re = /((\d+)\.(\d+))/; 30 var s = 'abc123.456def'; 31 32 re.exec(s); 33 34 assertEquals(s, RegExp.input); 35 assertEquals('123.456', RegExp.lastMatch); 36 assertEquals('456', RegExp.lastParen); 37 assertEquals('abc', RegExp.leftContext); 38 assertEquals('def', RegExp.rightContext); 39 40 assertEquals(s, RegExp['$_']); 41 assertEquals('123.456', RegExp['$&']); 42 assertEquals('456', RegExp['$+']); 43 assertEquals('abc', RegExp['$`']); 44 assertEquals('def', RegExp["$'"]); 45 46 assertEquals('123.456', RegExp['$1']); 47 assertEquals('123', RegExp['$2']); 48 assertEquals('456', RegExp['$3']); 49 for (var i = 4; i < 10; ++i) { 50 assertEquals('', RegExp['$' + i]); 51 } 52 53 // They should be read only. 54 RegExp['$1'] = 'fisk'; 55 assertEquals('123.456', RegExp['$1']); 56 57 // String.prototype.match and String.prototype.replace (when given a 58 // regexp) and also RegExp.prototype.test should all behave as if 59 // RegExp.prototype.exec were called. 60 s = 'ghi789.012jkl'; 61 s.match(re); 62 assertEquals(s, RegExp.input); 63 assertEquals('789.012', RegExp.lastMatch); 64 assertEquals('012', RegExp.lastParen); 65 assertEquals('ghi', RegExp.leftContext); 66 assertEquals('jkl', RegExp.rightContext); 67 assertEquals(s, RegExp['$_']); 68 assertEquals('789.012', RegExp['$&']); 69 assertEquals('012', RegExp['$+']); 70 assertEquals('ghi', RegExp['$`']); 71 assertEquals('jkl', RegExp["$'"]); 72 assertEquals('789.012', RegExp['$1']); 73 assertEquals('789', RegExp['$2']); 74 assertEquals('012', RegExp['$3']); 75 for (var i = 4; i < 10; ++i) { 76 assertEquals('', RegExp['$' + i]); 77 } 78 79 s = 'abc123.456def'; 80 s.replace(re, 'whocares'); 81 assertEquals(s, RegExp.input); 82 assertEquals('123.456', RegExp.lastMatch); 83 assertEquals('456', RegExp.lastParen); 84 assertEquals('abc', RegExp.leftContext); 85 assertEquals('def', RegExp.rightContext); 86 assertEquals(s, RegExp['$_']); 87 assertEquals('123.456', RegExp['$&']); 88 assertEquals('456', RegExp['$+']); 89 assertEquals('abc', RegExp['$`']); 90 assertEquals('def', RegExp["$'"]); 91 assertEquals('123.456', RegExp['$1']); 92 assertEquals('123', RegExp['$2']); 93 assertEquals('456', RegExp['$3']); 94 for (var i = 4; i < 10; ++i) { 95 assertEquals('', RegExp['$' + i]); 96 } 97 98 s = 'ghi789.012jkl'; 99 re.test(s); 100 assertEquals(s, RegExp.input); 101 assertEquals('789.012', RegExp.lastMatch); 102 assertEquals('012', RegExp.lastParen); 103 assertEquals('ghi', RegExp.leftContext); 104 assertEquals('jkl', RegExp.rightContext); 105 assertEquals(s, RegExp['$_']); 106 assertEquals('789.012', RegExp['$&']); 107 assertEquals('012', RegExp['$+']); 108 assertEquals('ghi', RegExp['$`']); 109 assertEquals('jkl', RegExp["$'"]); 110 assertEquals('789.012', RegExp['$1']); 111 assertEquals('789', RegExp['$2']); 112 assertEquals('012', RegExp['$3']); 113 for (var i = 4; i < 10; ++i) { 114 assertEquals('', RegExp['$' + i]); 115 } 116 117 // String.prototype.replace must interleave matching and replacing when a 118 // global regexp is matched and replaced with the result of a function, in 119 // case the function uses the static properties of the regexp constructor. 120 re = /(.)/g; 121 function f() { return RegExp.$1; }; 122 assertEquals('dddd', 'abcd'.replace(re, f)); 123 124 // lastParen where the last parenthesis didn't match. 125 assertEquals(["foo",undefined], /foo(?:a(x))?/.exec("foobx"), 126 "lastParen setup"); 127 assertEquals("", RegExp.lastParen, "lastParen"); 128 129 // The same test for $1 to $9. 130 for (var i = 1; i <= 9; i++) { 131 var haystack = "foo"; 132 var re_text = "^foo"; 133 for (var j = 0; j < i - 1; j++) { 134 haystack += "x"; 135 re_text += "(x)"; 136 } 137 re_text += "(?:a(x))?"; 138 haystack += "bx"; 139 var re = new RegExp(re_text); 140 assertTrue(re.test(haystack), "$" + i + " setup"); 141 for (var j = 1; j < i - 1; j++) { 142 assertEquals("x", RegExp['$' + j], "$" + j + " in $" + i + " setup"); 143 } 144 assertEquals("", RegExp['$' + (i)], "$" + i); 145 } 146 147 RegExp.input = Number(); 148 assertTrue(typeof RegExp.input == typeof String(), "RegExp.input coerces values to booleans"); 149 150 // Ensure that we save the correct string as the last subject when 151 // we do a match on a sliced string (the top one not the underlying). 152 var foo = "lsdfj sldkfj sdklfj lsdfjl sdkfjlsdk fjsdl fjsdljskdj flsj flsdkj flskd regexp: /foobar/\nldkfj sdlkfj sdkl"; 153 assertTrue(/^([a-z]+): (.*)/.test(foo.substring(foo.indexOf("regexp:"))), "regexp: setup"); 154 assertEquals("regexp", RegExp.$1, "RegExp.$1"); 155 156 157 // Check that calling with no argument is the same as calling with undefined. 158 assertTrue(/^undefined$/.test()); 159 assertEquals(["undefined"], /^undefined$/.exec()); 160
