LayoutTests/ietestcenter/Javascript/TestCases/15.4.4.20-9-6.js

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ES5Harness.registerTest( {
id: "15.4.4.20-9-6",

path: "TestCases/chapter15/15.4/15.4.4/15.4.4.20/15.4.4.20-9-6.js",

description: "Array.prototype.filter visits deleted element in array after the call when same index is also present in prototype",

test: function testcase() { 
 
  function callbackfn(val, idx, obj)
  {
    delete srcArr[2];
    delete srcArr[4];
    if(val > 0)
      return true;
    else
      return false;
   }

  Array.prototype[4] = 5;
  var srcArr = [1,2,3,4,5];
  var resArr = srcArr.filter(callbackfn);
  delete Array.prototype[4];
  if(resArr.length === 4 && resArr[0] === 1 && resArr[3] == 5)    // only one element deleted
      return true;  
  
 },

precondition: function prereq() {
  return fnExists(Array.prototype.filter);
 }
});