LayoutTests/ietestcenter/Javascript/TestCases/15.4.4.21-9-1.js

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ES5Harness.registerTest( {
id: "15.4.4.21-9-1",

path: "TestCases/chapter15/15.4/15.4.4/15.4.4.21/15.4.4.21-9-1.js",

description: "Array.prototype.reduce doesn't consider new elements added beyond the initial length of array after it is called",

test: function testcase() { 
 
  var lastIndexVisited=-1; 
 
  function callbackfn(preval, val, idx, obj)
  {
    if (idx===0) obj[10] = 10;
    lastIndexVisited=idx;
    return true;
  }
  
  [0,1].reduce(callbackfn);
  return lastIndexVisited === 1;  
  
 },

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