JSTests/test262/test/built-ins/Number/S8.12.8_A4.js

// Copyright 2009 the Sputnik authors.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
info: |
    We overload valueOf method so it return non Primitive value and toString method so it return non Primitive value too
    Thus [[DefaultValue]] must generate TypeError error
es5id: 8.12.8_A4
description: >
    Try to overload toString and valueOf methods, they returned new
    Objects
---*/

try
{
  var __obj = {valueOf:function(){return new Object;},toString: function() {return new Object();}}
  Number(__obj);
  $ERROR('#1.1: var __obj = {valueOf:function(){return new Object;},toNumber: function() {return new Object();}}; Number(__obj) throw TypeError. Actual: ' + (Number(__obj)));
}
catch(e)
{
  if ((e instanceof TypeError) !== true) {
    $ERROR('#1.2: var __obj = {valueOf:function(){return new Object;},toNumber: function() {return new Object();}}; Number(__obj) throw TypeError. Actual: ' + (e));
  }
}