src/third_party/v8/test/mjsunit/regress/regress-1790.js

// 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.
//     * Neither the name of Google Inc. nor the names of its
//       contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// Regression test checking that the sequence of element access in built-in
// array functions is specification conform (i.e. [[HasProperty]] might return
// bogus result after [[Get]] has been called).

function CheckSequence(builtin, callback) {
  var array = [1,2,3];
  var callback_count = 0;
  var callback_wrapper = function() {
    callback_count++;
    return callback()
  }

  // Define getter that will delete itself upon first invocation.
  Object.defineProperty(array, '1', {
    get: function () { delete array[1]; },
    configurable: true
  });

  assertTrue(array.hasOwnProperty('1'));
  builtin.apply(array, [callback_wrapper, 'argument']);
  assertFalse(array.hasOwnProperty('1'));
  assertEquals(3, callback_count);
}

CheckSequence(Array.prototype.every,       function() { return true; });
CheckSequence(Array.prototype.filter,      function() { return true; });
CheckSequence(Array.prototype.forEach,     function() { return 0; });
CheckSequence(Array.prototype.map,         function() { return 0; });
CheckSequence(Array.prototype.reduce,      function() { return 0; });
CheckSequence(Array.prototype.reduceRight, function() { return 0; });
CheckSequence(Array.prototype.some,        function() { return false; });