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

/**
 * Operator ++x returns x = ToNumber(x) + 1
 *
 * @path ch11/11.4/11.4.4/S11.4.4_A3_T5.js
 * @description Type(x) is Object object or Function object
 */

//CHECK#1
var x = {}; 
++x; 
if (isNaN(x) !== true) {
  $ERROR('#1: var x = {}; ++x; x === Not-a-Number. Actual: ' + (x));
}

//CHECK#2
var x = function(){return 1}; 
++x; 
if (isNaN(x) !== true) {
  $ERROR('#2: var x = function(){return 1}; ++x; x === Not-a-Number. Actual: ' + (x));
}

