string-replace.js 10.2 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
// Copyright 2009 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
//       copyright notice, this list of conditions and the following
//       disclaimer in the documentation and/or other materials provided
//       with the distribution.
//     * Neither the name of Google Inc. nor the names of its
//       contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

/**
 * @fileoverview Test String.prototype.replace
 */

function replaceTest(result, subject, pattern, replacement) {
33
  var name =
34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106
    "\"" + subject + "\".replace(" + pattern + ", " + replacement + ")";
  assertEquals(result, subject.replace(pattern, replacement), name);
}


var short = "xaxbxcx";

replaceTest("axbxcx", short, "x", "");
replaceTest("axbxcx", short, /x/, "");
replaceTest("abc", short, /x/g, "");

replaceTest("xaxxcx", short, "b", "");
replaceTest("xaxxcx", short, /b/, "");
replaceTest("xaxxcx", short, /b/g, "");


replaceTest("[]axbxcx", short, "x", "[]");
replaceTest("[]axbxcx", short, /x/, "[]");
replaceTest("[]a[]b[]c[]", short, /x/g, "[]");

replaceTest("xax[]xcx", short, "b", "[]");
replaceTest("xax[]xcx", short, /b/, "[]");
replaceTest("xax[]xcx", short, /b/g, "[]");


replaceTest("[$]axbxcx", short, "x", "[$$]");
replaceTest("[$]axbxcx", short, /x/, "[$$]");
replaceTest("[$]a[$]b[$]c[$]", short, /x/g, "[$$]");

replaceTest("xax[$]xcx", short, "b", "[$$]");
replaceTest("xax[$]xcx", short, /b/, "[$$]");
replaceTest("xax[$]xcx", short, /b/g, "[$$]");


replaceTest("[]axbxcx", short, "x", "[$`]");
replaceTest("[]axbxcx", short, /x/, "[$`]");
replaceTest("[]a[xa]b[xaxb]c[xaxbxc]", short, /x/g, "[$`]");

replaceTest("xax[xax]xcx", short, "b", "[$`]");
replaceTest("xax[xax]xcx", short, /b/, "[$`]");
replaceTest("xax[xax]xcx", short, /b/g, "[$`]");


replaceTest("[x]axbxcx", short, "x", "[$&]");
replaceTest("[x]axbxcx", short, /x/, "[$&]");
replaceTest("[x]a[x]b[x]c[x]", short, /x/g, "[$&]");

replaceTest("xax[b]xcx", short, "b", "[$&]");
replaceTest("xax[b]xcx", short, /b/, "[$&]");
replaceTest("xax[b]xcx", short, /b/g, "[$&]");


replaceTest("[axbxcx]axbxcx", short, "x", "[$']");
replaceTest("[axbxcx]axbxcx", short, /x/, "[$']");
replaceTest("[axbxcx]a[bxcx]b[cx]c[]", short, /x/g, "[$']");

replaceTest("xax[xcx]xcx", short, "b", "[$']");
replaceTest("xax[xcx]xcx", short, /b/, "[$']");
replaceTest("xax[xcx]xcx", short, /b/g, "[$']");


replaceTest("[$1]axbxcx", short, "x", "[$1]");
replaceTest("[$1]axbxcx", short, /x/, "[$1]");
replaceTest("[]axbxcx", short, /x()/, "[$1]");
replaceTest("[$1]a[$1]b[$1]c[$1]", short, /x/g, "[$1]");
replaceTest("[]a[]b[]c[]", short, /x()/g, "[$1]");

replaceTest("xax[$1]xcx", short, "b", "[$1]");
replaceTest("xax[$1]xcx", short, /b/, "[$1]");
replaceTest("xax[]xcx", short, /b()/, "[$1]");
replaceTest("xax[$1]xcx", short, /b/g, "[$1]");
replaceTest("xax[]xcx", short, /b()/g, "[$1]");

107 108 109 110 111 112 113 114 115
// Bug 317 look-alikes. If "$e" has no meaning, the "$" must be retained.
replaceTest("xax$excx", short, "b", "$e");
replaceTest("xax$excx", short, /b/, "$e");
replaceTest("xax$excx", short, /b/g, "$e");

replaceTest("xaxe$xcx", short, "b", "e$");
replaceTest("xaxe$xcx", short, /b/, "e$");
replaceTest("xaxe$xcx", short, /b/g, "e$");

116

117 118
replaceTest("[$$$1$$a1abb1bb0$002$3$03][$$$1$$b1bcc1cc0$002$3$03]c",
            "abc", /(.)(?=(.))/g, "[$$$$$$1$$$$$11$01$2$21$02$020$002$3$03]");
119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165

// Replace with functions.


var ctr = 0;
replaceTest("0axbxcx", short, "x", function r(m, i, s) {
  assertEquals(3, arguments.length, "replace('x',func) func-args");
  assertEquals("x", m, "replace('x',func(m,..))");
  assertEquals(0, i, "replace('x',func(..,i,..))");
  assertEquals(short, s, "replace('x',func(..,s))");
  return String(ctr++);
});
assertEquals(1, ctr, "replace('x',func) num-match");

ctr = 0;
replaceTest("0axbxcx", short, /x/, function r(m, i, s) {
  assertEquals(3, arguments.length, "replace(/x/,func) func-args");
  assertEquals("x", m, "replace(/x/,func(m,..))");
  assertEquals(0, i, "replace(/x/,func(..,i,..))");
  assertEquals(short, s, "replace(/x/,func(..,s))");
  return String(ctr++);
});
assertEquals(1, ctr, "replace(/x/,func) num-match");

ctr = 0;
replaceTest("0a1b2c3", short, /x/g, function r(m, i, s) {
  assertEquals(3, arguments.length, "replace(/x/g,func) func-args");
  assertEquals("x", m, "replace(/x/g,func(m,..))");
  assertEquals(ctr * 2, i, "replace(/x/g,func(..,i,.))");
  assertEquals(short, s, "replace(/x/g,func(..,s))");
  return String(ctr++);
});
assertEquals(4, ctr, "replace(/x/g,func) num-match");

ctr = 0;
replaceTest("0a1b2cx", short, /(x)(?=(.))/g, function r(m, c1, c2, i, s) {
  assertEquals(5, arguments.length, "replace(/(x)(?=(.))/g,func) func-args");
  assertEquals("x", m, "replace(/(x)(?=(.))/g,func(m,..))");
  assertEquals("x", c1, "replace(/(x)(?=(.))/g,func(..,c1,..))");
  assertEquals(["a","b","c"][ctr], c2, "replace(/(x)(?=(.))/g,func(..,c2,..))");
  assertEquals(ctr * 2, i, "replace(/(x)(?=(.))/g,func(..,i,..))");
  assertEquals(short, s, "replace(/(x)(?=(.))/g,func(..,s))");
  return String(ctr++);
});
assertEquals(3, ctr, "replace(/x/g,func) num-match");


166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189
replaceTest("ABCD", "abcd", /(.)/g, function r(m, c1, i, s) {
  assertEquals("d", RegExp.lastMatch);
  assertEquals("d", RegExp.$1);
  assertEquals("abc", RegExp.leftContext);
  return m.toUpperCase();
});


var long = "";
while (long.length < 0x2000) {
  long += String.fromCharCode(65 + Math.random() * 26);
}

for (var i = 0; i < 3; i++) {
  replaceTest(long.toLowerCase(), long, /(..)/g, function r(m, c1, i, s) {
    var expected = long.substring(0x1ffe, 0x2000);
    assertEquals(expected, RegExp.lastMatch);
    assertEquals(expected, RegExp.$1);
    assertEquals(long.substring(0, 0x1ffe), RegExp.leftContext);
    return m.toLowerCase();
  });
}


190 191 192 193 194 195 196 197 198 199 200 201 202 203 204
// Test special cases of replacement parts longer than 1<<11.
var longstring = "xyzzy";
longstring = longstring + longstring;
longstring = longstring + longstring;
longstring = longstring + longstring;
longstring = longstring + longstring;
longstring = longstring + longstring;
longstring = longstring + longstring;
longstring = longstring + longstring;
longstring = longstring + longstring;
longstring = longstring + longstring;
longstring = longstring + longstring;
longstring = longstring + longstring;
// longstring.length == 5 << 11

205
replaceTest(longstring + longstring,
206
            "<" + longstring + ">", /<(.*)>/g, "$1$1");
207

208
replaceTest("string 42", "string x", /x/g, function() { return 42; });
209
replaceTest("string 42", "string x", /x/, function() { return 42; });
210 211 212 213
replaceTest("string 42", "string x", /[xy]/g, function() { return 42; });
replaceTest("string 42", "string x", /[xy]/, function() { return 42; });
replaceTest("string true", "string x", /x/g, function() { return true; });
replaceTest("string null", "string x", /x/g, function() { return null; });
214 215
replaceTest("string undefined", "string x", /x/g, function() { return undefined; });

216
replaceTest("aundefinedbundefinedcundefined",
217
            "abc", /(.)|(.)/g, function(m, m1, m2, i, s) { return m1+m2; });
218 219 220

// Test nested calls to replace, including that it sets RegExp.$& correctly.

221 222 223 224
var str = 'She sells seashells by the seashore.';
var re = /sh/g;
assertEquals('She sells sea$schells by the sea$schore.',
             str.replace(re,"$$" + 'sch'))
225 226 227 228


var replace_obj = { length: 0, toString: function() { return "x"; }};
assertEquals("axc", "abc".replace(/b/, replace_obj));
229
assertEquals("axc", "abc".replace(/b/g, replace_obj));
230 231 232 233

var search_obj = { length: 1, toString: function() { return "b"; }};
assertEquals("axc", "abc".replace(search_obj, function() { return "x"; }));

234 235 236 237
var side_effect_flag = false;
var replace_obj_side_effects = {
    toString: function() { side_effect_flag = true; return "x" }
}
238
assertEquals("abc", "abc".replace(/z/g, replace_obj_side_effects));
239 240
assertTrue(side_effect_flag);  // Side effect triggers even without a match.

241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285
var regexp99pattern = "";
var subject = "";
for (var i = 0; i < 99; i++) {
  regexp99pattern += "(.)";
  subject += String.fromCharCode(i + 24);
}

function testIndices99(re) {
  // Test $1 .. $99
  for (var i = 1; i < 100; i++) {
    assertEquals(String.fromCharCode(i + 23),
                 subject.replace(re, "$" + i));
  }

  // Test $01 .. $09
  for (var i = 1; i < 10; i++) {
    assertEquals(String.fromCharCode(i + 23),
                 subject.replace(re, "$0" + i));
  }

  assertEquals("$0", subject.replace(re, "$0"));
  assertEquals("$00", subject.replace(re, "$00"));
  assertEquals(String.fromCharCode(10 + 23) + "0",
               subject.replace(re, "$100"));
}

testIndices99(new RegExp(regexp99pattern));
testIndices99(new RegExp(regexp99pattern, "g"));

var regexp59pattern = "";
for (var i = 0; i < 59; i++) regexp59pattern += "(.)";

function testIndices59(re) {
  // Test $60 .. $99.  Captures reach up to 59.  Per spec, how to deal
  // with this is implementation-dependent. We interpret $60 as $6
  // followed by "0", $61 as $6, followed by "1" and so on.
  var tail = subject.substr(59);
  for (var i = 60; i < 100; i++) {
    assertEquals(String.fromCharCode(i / 10 + 23) + (i % 10) + tail,
                 subject.replace(re, "$" + i));
  }
}

testIndices59(new RegExp(regexp59pattern));
testIndices59(new RegExp(regexp59pattern, "g"));