array-001.js - mozsearch

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/* -*- indent-tabs-mode: nil; js-indent-level: 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/. */

/*

 * Date: 24 September 2001

 * SUMMARY: Truncating arrays that have decimal property names.

 * From correspondence with Igor Bukanov <igor@icesoft.no>:

*/

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

var UBound = 0;

var BUGNUMBER = '(none)';

var summary = 'Truncating arrays that have decimal property names';

var BIG_INDEX = 4294967290;

var status = '';

var statusitems = [];

var actual = '';

var actualvalues = [];

var expect= '';

var expectedvalues = [];

var arr = Array(BIG_INDEX);

arr[BIG_INDEX - 1] = 'a';

arr[BIG_INDEX - 10000] = 'b';

arr[BIG_INDEX - 0.5] = 'c';  // not an array index - but a valid property name

// Truncate the array -

arr.length = BIG_INDEX - 5000;

// Enumerate its properties with for..in

var s = '';

for (var i in arr)

  s += arr[i];

/*

 * We expect s == 'cb' or 'bc' (EcmaScript does not fix the order).

 * Note 'c' is included: for..in includes ALL enumerable properties,

 * not just array-index properties. The bug was: Rhino gave s == ''.

*/

status = inSection(1);

actual = sortThis(s);

expect = 'bc';

addThis();

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

test();

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

function sortThis(str)

  var chars = str.split('');

  chars = chars.sort();

  return chars.join('');

function addThis()

  statusitems[UBound] = status;

  actualvalues[UBound] = actual;

  expectedvalues[UBound] = expect;

  UBound++;

function test()

  printBugNumber(BUGNUMBER);

  printStatus (summary);

  for (var i=0; i<UBound; i++)

    reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);