JSTests/test262/test/built-ins/Object/S15.2.2.1_A1_T3.js

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

/*---
info: |
    When the Object constructor is called with no arguments the following steps are taken:
    (The argument value was not supplied or its type was Null or Undefined.)
    i)	Create a new native ECMAScript object.
    ii) 	The [[Prototype]] property of the newly constructed object is set to the Object prototype object.
    iii) 	The [[Class]] property of the newly constructed object is set to "Object".
    iv) 	The newly constructed object has no [[Value]] property.
    v) 	Return the newly created native object
es5id: 15.2.2.1_A1_T3
description: Creating new Object(null) and checking its properties
---*/

var obj = new Object(null);

// CHECK#0
if (obj === undefined) {
  $ERROR('#0: new Object(null) return the newly created native object.');
}

// CHECK#1
if (obj.constructor !== Object) {
  $ERROR('#1: new Object(null) create a new native ECMAScript object');
}

// CHECK#2
if (!(Object.prototype.isPrototypeOf(obj))) {
  $ERROR('#2: when new Object(null) calls the [[Prototype]] property of the newly constructed object is set to the Object prototype object.');
}

// CHECK#3
var to_string_result = '[object ' + 'Object' + ']';
if (obj.toString() !== to_string_result) {
  $ERROR('#3: when new Object(null) calls the [[Class]] property of the newly constructed object is set to "Object".');
}

// CHECK#4
if (obj.valueOf().toString() !== to_string_result.toString()) {
  $ERROR('#4: when new Object(null) calls the newly constructed object has no [[Value]] property.');
}