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87 lines
2.6 KiB
JavaScript
Executable File
87 lines
2.6 KiB
JavaScript
Executable File
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is JavaScript Engine testing utilities.
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*
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* The Initial Developer of the Original Code is
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* Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2005
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s): zack-weg@gmx.de
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* Bob Clary <bob@bclary.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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//-----------------------------------------------------------------------------
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var bug = 211590;
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var summary = 'Math.random should be random';
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var actual = '';
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var expect = 'between 49% and 51%';
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printBugNumber (bug);
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printStatus (summary);
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var r = Math.random;
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var c = Math.pow( 2, 53 );
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var n = 10000;
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var odd1 = 0;
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var odd2 = 0;
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for ( var i = 0; i < n; ++i )
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{
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var v= r() * c;
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if ( v & 1 )
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++odd1;
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if ( v - c + c & 1 )
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++odd2;
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}
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odd1 *= 100 / n;
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odd2 *= 100 / n;
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if (odd1 >= 49 && odd1 <= 51)
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{
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actual = 'between 49% and 51%';
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}
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else
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{
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actual = ' is ' + odd1.toFixed(3);
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}
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reportCompare(expect, actual, summary);
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if (odd2 >= 49 && odd2 <= 51)
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{
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actual = 'between 49% and 51%';
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}
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else
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{
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actual = ' is ' + odd2.toFixed(3);
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}
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reportCompare(expect, actual, summary);
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