text: /// Copyright (c) 2012 Ecma International.  All rights reserved. 
  /**
   * @path ch15/15.4/15.4.4/15.4.4.22/15.4.4.22-10-6.js
   * @description Array.prototype.reduceRight - subclassed array when initialvalue provided
   */
  
  
  function testcase() {
    foo.prototype = new Array(0, 1, 2, 3);
    function foo() {}
    var f = new foo();
    
    function cb(prevVal, curVal, idx, obj){return prevVal + curVal;}
    if(f.reduceRight(cb,"4") === "43210")
      return true;
   }
  runTestCase(testcase);
  