test/script/basic/NASHORN-444.js

/*
 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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 * questions.
 */

/*
 * NASHORN-444 : regex returns different result on second invocation.
 *
 * @test
 * @run
 */

var formatRegExp = /%[sdj%]/g;
var format = function(f) {
  if (typeof f !== 'string') {
    var objects = [];
    for (var i = 0; i < arguments.length; i++) {
      objects.push(inspect(arguments[i]));
    }
    return objects.join(' ');
  }

  var i = 1;
  var args = arguments;
  var len = args.length;
  if (formatRegExp.lastIndex !== 0) throw "expected lastIndex === 0, actual: " + formatRegExp.lastIndex;
  var str = String(f).replace(formatRegExp, function(x) {
    if (x === '%%') return '%';
    if (i >= len) return x;
    switch (x) {
      case '%s': return String(args[i++]);
      case '%d': return Number(args[i++]);
      case '%j': return JSON.stringify(args[i++]);
      default:
        return x;
    }
  });
  print(i + ' '+len);
  if (formatRegExp.lastIndex !== 0) throw "expected lastIndex === 0, actual: " + formatRegExp.lastIndex;
  return str;
};

var obj = function() {
    return {
        a: 1,
        b: 2
    };
};

var o = obj();
print(format('obj %j', o));
print(format('obj %j', o));