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 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

 /* This Source Code Form is subject to the terms of the Mozilla Public

  * License, v. 2.0. If a copy of the MPL was not distributed with this

  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

 //-----------------------------------------------------------------------------

 var BUGNUMBER     = "(none)";

 var summary = "A (slow) generator of pi";

 var actual, expect;

 printBugNumber(BUGNUMBER);

 printStatus(summary);

 /**************

  * BEGIN TEST *

  **************/

 function pi()

 {

   var val = 0;

   var curr = 1;

   var isNeg = false;

   while (true)

   {

     if (isNeg)

       yield val -= 4/curr;

     else

       yield val += 4/curr;

     curr += 2;

     isNeg = !isNeg;

   }

 }

 var failed = false;

 var it = pi();

 var vals =

   [4,

    4 - 4/3,

    4 - 4/3 + 4/5,

    4 - 4/3 + 4/5 - 4/7];

 try

 {

   for (var i = 0, sz = vals.length; i < sz; i++)

     if (it.next() != vals[i])

       throw vals[i];

 }

 catch (e)

 {

   failed = e;

 }

 expect = false;

 actual = failed;

 reportCompare(expect, actual, summary);