tor-browser

The Tor Browser
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regress-57043.js (2310B)

      1 /* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
      2 /* This Source Code Form is subject to the terms of the Mozilla Public
      3 * License, v. 2.0. If a copy of the MPL was not distributed with this
      4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      5 
      6 /*
      7 * Date: 03 December 2000
      8 *
      9 *
     10 * SUMMARY:  This test arose from Bugzilla bug 57043:
     11 * "Negative integers as object properties: strange behavior!"
     12 *
     13 * We check that object properties may be indexed by signed
     14 * numeric literals, as in assignments like obj[-1] = 'Hello' 
     15 *
     16 * NOTE: it should not matter whether we provide the literal with
     17 * quotes around it or not; e.g. these should be equivalent:
     18 *
     19 *                                    obj[-1]  = 'Hello'
     20 *                                    obj['-1']  = 'Hello'
     21 */
     22 //-----------------------------------------------------------------------------
     23 var BUGNUMBER = 57043;
     24 var summary = 'Indexing object properties by signed numerical literals -'
     25  var statprefix = 'Adding a property to test object with an index of ';
     26 var statsuffix =  ', testing it now -';
     27 var propprefix = 'This is property ';
     28 var obj = new Object();
     29 var status = ''; var actual = ''; var expect = ''; var value = '';
     30 
     31 
     32 //  various indices to try -
     33 var index =
     34  [-1073741825, -1073741824, -1073741823, -5000, -507, -3, -2, -1, -0, 0, 1, 2, 3, 1073741823, 1073741824, 1073741825];
     35 
     36 
     37 //------------------------------------------------------------------------------------------------- 
     38 test();
     39 //-------------------------------------------------------------------------------------------------
     40 
     41 
     42 function test()
     43 {
     44  printBugNumber(BUGNUMBER);
     45  printStatus (summary);
     46 
     47  for (var j in index) {testProperty(index[j]);}
     48 }
     49 
     50 
     51 function testProperty(i)
     52 {
     53  status = getStatus(i);
     54 
     55  // try to assign a property using the given index -
     56  obj[i] = value = (propprefix  +  i);  
     57 
     58  // try to read the property back via the index (as number) -
     59  expect = value;
     60  actual = obj[i];
     61  reportCompare(expect, actual, status); 
     62 
     63  // try to read the property back via the index as string -
     64  expect = value;
     65  actual = obj[String(i)];
     66  reportCompare(expect, actual, status);
     67 }
     68 
     69 function positive(n) { return 1 / n > 0; }
     70 
     71 function getStatus(i)
     72 {
     73  return statprefix +
     74         (positive(i) ? i : "-" + -i) +
     75         statsuffix;
     76 }