string-indexof-2.js 3.89 KB
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// Copyright 2008 the V8 project authors. All rights reserved.
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// 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,
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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var lipsum = "lorem ipsum per se esse fugiendum. itaque aiunt hanc quasi "
    + "naturalem atque insitam in animis nostris inesse notionem, ut "
    + "alterum esse appetendum, alterum aspernandum sentiamus. Alii autem,"
    + " quibus ego assentior, cum a philosophis compluribus permulta "
    + "dicantur, cur nec voluptas in bonis sit numeranda nec in malis "
    + "dolor, non existimant oportere nimium nos causae confidere, sed et"
    + " argumentandum et accurate disserendum et rationibus conquisitis de"
    + " voluptate et dolore disputandum putant.\n"
    + "Sed ut perspiciatis, unde omnis iste natus error sit voluptatem "
    + "accusantium doloremque laudantium, totam rem aperiam eaque ipsa,"
    + "quae ab illo inventore veritatis et quasi architecto beatae vitae "
    + "dicta sunt, explicabo. nemo enim ipsam voluptatem, quia voluptas"
    + "sit, aspernatur aut odit aut fugit, sed quia consequuntur magni"
    + " dolores eos, qui ratione voluptatem sequi nesciunt, neque porro"
    + " quisquam est, qui dolorem ipsum, quia dolor sit, amet, "
    + "consectetur, adipisci velit, sed quia non numquam eius modi"
    + " tempora incidunt, ut labore et dolore magnam aliquam quaerat "
    + "voluptatem. ut enim ad minima veniam, quis nostrum exercitationem "
    + "ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi "
    + "consequatur? quis autem vel eum iure reprehenderit, qui in ea "
    + "voluptate velit esse, quam nihil molestiae consequatur, vel illum, "
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    + "qui dolorem eum fugiat, quo voluptas nulla pariatur?\n";
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assertEquals(893, lipsum.indexOf("lorem ipsum, quia dolor sit, amet"),
        "Lipsum");
// test a lot of substrings of differing length and start-position.
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for(var i = 0; i < lipsum.length; i += 3) {
  for(var len = 1; i + len < lipsum.length; len += 7) {
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    var substring = lipsum.substring(i, i + len);
    var index = -1;
    do {
      index = lipsum.indexOf(substring, index + 1);
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      assertTrue(index != -1,
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                 "Lipsum substring " + i + ".." + (i + len-1) + " not found");
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      assertEquals(lipsum.substring(index, index + len), substring,
          "Wrong lipsum substring found: " + i + ".." + (i + len - 1) + "/" +
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              index + ".." + (index + len - 1));
    } while (index >= 0 && index < i);
    assertEquals(i, index, "Lipsum match at " + i + ".." + (i + len - 1));
  }
}