LayoutTests/ietestcenter/Javascript/TestCases/15.4.4.21-9-3.js

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ES5Harness.registerTest( {
id: "15.4.4.21-9-3",

path: "TestCases/chapter15/15.4/15.4.4/15.4.4.21/15.4.4.21-9-3.js",

description: "Array.prototype.reduce doesn't visit deleted elements in array after the call",

test: function testcase() { 
 
  function callbackfn(prevVal, curVal, idx, obj)  
  {
    delete arr[3];
    delete arr[4];
    return prevVal + curVal;    
  }

  var arr = ['1',2,3,4,5];
  if(arr.reduce(callbackfn) === "123"  )    // two elements deleted
    return true;  
  
 },

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