test262/test/suite/ch15/15.7/15.7.3/15.7.3.1/S15.7.3.1_A1_T1.js

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

/**
 * The Number property "prototype" has { DontEnum, DontDelete, ReadOnly } attributes
 *
 * @path ch15/15.7/15.7.3/15.7.3.1/S15.7.3.1_A1_T1.js
 * @description Checking if varying the Number.prototype property fails
 */

//CHECK#1
var x = Number.prototype;
Number.prototype = 1;
if (Number.prototype !== x) {
  $ERROR('#1: The Number.prototype property has the attributes ReadOnly');
}