JSTests/test262/test/built-ins/Object/defineProperty/15.2.3.6-2-47.js

// Copyright (c) 2012 Ecma International.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
es5id: 15.2.3.6-2-47
description: >
    Object.defineProperty - TypeError exception is thrown  when 'P' is
    an object that neither toString nor valueOf returns a primitive
    value
---*/

var obj = {};
var toStringAccessed = false;
var valueOfAccessed = false;

var ownProp = {
  toString: function() {
    toStringAccessed = true;
    return {};
  },
  valueOf: function() {
    valueOfAccessed = true;
    return {};
  }
};
assert.throws(TypeError, function() {
  Object.defineProperty(obj, ownProp, {});
});
assert(valueOfAccessed, 'valueOfAccessed !== true');
assert(toStringAccessed, 'toStringAccessed !== true');