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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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tree10027f336435511475e392454359edea8e25895d /js/src/tests/ecma_3/RegExp/15.10.6.2-1.js
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+/* -*- 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');
+}