// Copyright 2012 the V8 project authors. All rights reserved.
// 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.
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//       from this software without specific prior written permission.
//
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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function testSideEffects(subject, re) {
  var counter = 0;
  var side_effect_object = { valueOf: function() { return counter++; } };
  re.lastIndex = side_effect_object;
  re.exec(subject);
  assertEquals(1, counter);

  re.lastIndex = side_effect_object;
  re.test(subject);
  assertEquals(2, counter);
}

testSideEffects("zzzz", /a/);
testSideEffects("zzzz", /a/g);
testSideEffects("xaxa", /a/);
testSideEffects("xaxa", /a/g);