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      1 // Copyright 2012 the V8 project authors. All rights reserved.
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      3 // modification, are permitted provided that the following conditions are
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     14 //       from this software without specific prior written permission.
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     26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 
     28 // Regression test checking that the sequence of element access in built-in
     29 // array functions is specification conform (i.e. [[HasProperty]] might return
     30 // bogus result after [[Get]] has been called).
     31 
     32 function CheckSequence(builtin, callback) {
     33   var array = [1,2,3];
     34   var callback_count = 0;
     35   var callback_wrapper = function() {
     36     callback_count++;
     37     return callback()
     38   }
     39 
     40   // Define getter that will delete itself upon first invocation.
     41   Object.defineProperty(array, '1', {
     42     get: function () { delete array[1]; },
     43     configurable: true
     44   });
     45 
     46   assertTrue(array.hasOwnProperty('1'));
     47   builtin.apply(array, [callback_wrapper, 'argument']);
     48   assertFalse(array.hasOwnProperty('1'));
     49   assertEquals(3, callback_count);
     50 }
     51 
     52 CheckSequence(Array.prototype.every,       function() { return true; });
     53 CheckSequence(Array.prototype.filter,      function() { return true; });
     54 CheckSequence(Array.prototype.forEach,     function() { return 0; });
     55 CheckSequence(Array.prototype.map,         function() { return 0; });
     56 CheckSequence(Array.prototype.reduce,      function() { return 0; });
     57 CheckSequence(Array.prototype.reduceRight, function() { return 0; });
     58 CheckSequence(Array.prototype.some,        function() { return false; });
     59