| /* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */ |
| /* This Source Code Form is subject to the terms of the Mozilla Public |
| * License, v. 2.0. If a copy of the MPL was not distributed with this |
| * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| |
| /* |
| * Date: 23 October 2001 |
| * |
| * SUMMARY: Testing regexps with the global flag set. |
| * NOT every substring fitting the given pattern will be matched. |
| * The parent string is CONSUMED as successive matches are found. |
| * |
| * From the ECMA-262 Final spec: |
| * |
| * 15.10.6.2 RegExp.prototype.exec(string) |
| * Performs a regular expression match of string against the regular |
| * expression and returns an Array object containing the results of |
| * the match, or null if the string did not match. |
| * |
| * The string ToString(string) is searched for an occurrence of the |
| * regular expression pattern as follows: |
| * |
| * 1. Let S be the value of ToString(string). |
| * 2. Let length be the length of S. |
| * 3. Let lastIndex be the value of the lastIndex property. |
| * 4. Let i be the value of ToInteger(lastIndex). |
| * 5. If the global property is false, let i = 0. |
| * 6. If i < 0 or i > length then set lastIndex to 0 and return null. |
| * 7. Call [[Match]], giving it the arguments S and i. |
| * If [[Match]] returned failure, go to step 8; |
| * otherwise let r be its State result and go to step 10. |
| * 8. Let i = i+1. |
| * 9. Go to step 6. |
| * 10. Let e be r's endIndex value. |
| * 11. If the global property is true, set lastIndex to e. |
| * |
| * etc. |
| * |
| * |
| * So when the global flag is set, |lastIndex| is incremented every time |
| * there is a match; not from i to i+1, but from i to "endIndex" e: |
| * |
| * e = (index of last input character matched so far by the pattern) + 1 |
| * |
| * Thus in the example below, the first endIndex e occurs after the |
| * first match 'a b'. The next match will begin AFTER this, and so |
| * will NOT be 'b c', but rather 'c d'. Similarly, 'd e' won't be matched. |
| */ |
| //----------------------------------------------------------------------------- |
| var i = 0; |
| var BUGNUMBER = '(none)'; |
| var summary = 'Testing regexps with the global flag set'; |
| var status = ''; |
| var statusmessages = new Array(); |
| var pattern = ''; |
| var patterns = new Array(); |
| var string = ''; |
| var strings = new Array(); |
| var actualmatch = ''; |
| var actualmatches = new Array(); |
| var expectedmatch = ''; |
| var expectedmatches = new Array(); |
| |
| |
| status = inSection(1); |
| string = 'a b c d e'; |
| pattern = /\w\s\w/g; |
| actualmatch = string.match(pattern); |
| expectedmatch = ['a b','c d']; // see above explanation - |
| addThis(); |
| |
| |
| status = inSection(2); |
| string = '12345678'; |
| pattern = /\d\d\d/g; |
| actualmatch = string.match(pattern); |
| expectedmatch = ['123','456']; |
| addThis(); |
| |
| |
| |
| //----------------------------------------------------------------------------- |
| test(); |
| //----------------------------------------------------------------------------- |
| |
| |
| |
| function addThis() |
| { |
| statusmessages[i] = status; |
| patterns[i] = pattern; |
| strings[i] = string; |
| actualmatches[i] = actualmatch; |
| expectedmatches[i] = expectedmatch; |
| i++; |
| } |
| |
| |
| function test() |
| { |
| enterFunc ('test'); |
| printBugNumber(BUGNUMBER); |
| printStatus (summary); |
| testRegExp(statusmessages, patterns, strings, actualmatches, expectedmatches); |
| exitFunc ('test'); |
| } |