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
28function CheckMatch(re, str, matches) {
29  assertEquals(matches.length > 0, re.test(str));
30  var result = str.match(re);
31  if (matches.length > 0) {
32    assertEquals(matches.length, result.length);
33    var lastExpected;
34    var lastFrom;
35    var lastLength;
36    for (var idx = 0; idx < matches.length; idx++) {
37      var from = matches[idx][0];
38      var length = matches[idx][1];
39      var expected = str.substr(from, length);
40      var name = str + "[" + from + ".." + (from+length) + "]";
41      assertEquals(expected, result[idx], name);
42      if (re.global || idx == 0) {
43        lastExpected = expected;
44        lastFrom = from;
45        lastLength = length;
46      }
47    }
48    assertEquals(lastExpected, RegExp.lastMatch, "lastMatch");
49    assertEquals(str.substr(0, lastFrom), RegExp.leftContext, "leftContext");
50    assertEquals(
51        str.substr(lastFrom + lastLength), RegExp.rightContext, "rightContext");
52  } else {
53    assertTrue(result === null);
54  }
55}
56
57CheckMatch(/abc/, "xxxabcxxxabcxxx", [[3, 3]]);
58CheckMatch(/abc/g, "xxxabcxxxabcxxx", [[3, 3], [9, 3]]);
59CheckMatch(/abc/, "xxxabababcxxxabcxxx", [[7, 3]]);
60CheckMatch(/abc/g, "abcabcabc", [[0, 3], [3, 3], [6, 3]]);
61CheckMatch(/aba/g, "ababababa", [[0, 3], [4, 3]]);
62CheckMatch(/foo/g, "ofooofoooofofooofo", [[1, 3], [5, 3], [12, 3]]);
63CheckMatch(/foobarbaz/, "xx", []);
64CheckMatch(new RegExp(""), "xxx", [[0, 0]]);
65CheckMatch(/abc/, "abababa", []);
66
67assertEquals("xxxdefxxxdefxxx", "xxxabcxxxabcxxx".replace(/abc/g, "def"));
68assertEquals("o-o-oofo-ofo", "ofooofoooofofooofo".replace(/foo/g, "-"));
69assertEquals("deded", "deded".replace(/x/g, "-"));
70assertEquals("-a-b-c-d-e-f-", "abcdef".replace(new RegExp("", "g"), "-"));
71
72CheckMatch(/a(.)/, "xyzzyabxyzzzyacxyzzy", [[5, 2], [6, 1]]);
73CheckMatch(/a(.)/g, "xyzzyabxyzzyacxyzzy", [[5, 2], [12, 2]]);
74
75CheckMatch(/a|(?:)/g, "aba", [[0, 1], [1, 0], [2, 1], [3, 0]]);
76CheckMatch(/a|(?:)/g, "baba", [[0, 0], [1, 1], [2, 0], [3, 1], [4, 0]]);
77CheckMatch(/a|(?:)/g, "bab", [[0, 0], [1, 1], [2, 0], [3, 0]]);
78