tor-browser

The Tor Browser
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regress-185485.js (2882B)

      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 *
      8 * Date:    16 Dec 2002
      9 * SUMMARY: Testing |with (x) {function f() {}}| when |x.f| already exists
     10 * See http://bugzilla.mozilla.org/show_bug.cgi?id=185485
     11 *
     12 * The idea is this: if |x| does not already have a property named |f|,
     13 * a |with| statement cannot be used to define one. See, for example,
     14 *
     15 *       http://bugzilla.mozilla.org/show_bug.cgi?id=159849#c11
     16 *       http://bugzilla.mozilla.org/show_bug.cgi?id=184107
     17 *
     18 *
     19 * However, if |x| already has a property |f|, a |with| statement can be
     20 * used to modify the value it contains:
     21 *
     22 *                 with (x) {f = 1;}
     23 *
     24 * This should work even if we use a |var| statement, like this:
     25 *
     26 *                 with (x) {var f = 1;}
     27 *
     28 * However, it should NOT work if we use a |function| statement, like this:
     29 *
     30 *                 with (x) {function f() {}}
     31 *
     32 * Instead, this should newly define a function f in global scope.
     33 * See http://bugzilla.mozilla.org/show_bug.cgi?id=185485
     34 *
     35 */
     36 //-----------------------------------------------------------------------------
     37 var UBound = 0;
     38 var BUGNUMBER = 185485;
     39 var summary = 'Testing |with (x) {function f() {}}| when |x.f| already exists';
     40 var status = '';
     41 var statusitems = [];
     42 var actual = '';
     43 var actualvalues = [];
     44 var expect= '';
     45 var expectedvalues = [];
     46 
     47 var x = { f:0, g:0 };
     48 
     49 with (x)
     50 {
     51  f = 1;
     52 }
     53 status = inSection(1);
     54 actual = x.f;
     55 expect = 1;
     56 addThis();
     57 
     58 with (x)
     59 {
     60  var f = 2;
     61 }
     62 status = inSection(2);
     63 actual = x.f;
     64 expect = 2;
     65 addThis();
     66 
     67 /*
     68 * Use of a function statement under the with-block should not affect
     69 * the local property |f|, but define a function |f| in global scope -
     70 */
     71 with (x)
     72 {
     73  function f() {}
     74 }
     75 status = inSection(3);
     76 actual = x.f;
     77 expect = 2;
     78 addThis();
     79 
     80 status = inSection(4);
     81 actual = typeof this.f;
     82 expect = 'function';
     83 addThis();
     84 
     85 
     86 /*
     87 * Compare use of function expression instead of function statement.
     88 * Note it is important that |x.g| already exists. Otherwise, this
     89 * would newly define |g| in global scope -
     90 */
     91 with (x)
     92 {
     93  var g = function() {}
     94 }
     95 status = inSection(5);
     96 actual = x.g.toString();
     97 expect = (function() {}).toString();
     98 addThis();
     99 
    100 
    101 
    102 //-----------------------------------------------------------------------------
    103 test();
    104 //-----------------------------------------------------------------------------
    105 
    106 
    107 
    108 function addThis()
    109 {
    110  statusitems[UBound] = status;
    111  actualvalues[UBound] = actual;
    112  expectedvalues[UBound] = expect;
    113  UBound++;
    114 }
    115 
    116 
    117 function test()
    118 {
    119  printBugNumber(BUGNUMBER);
    120  printStatus(summary);
    121 
    122  for (var i=0; i<UBound; i++)
    123  {
    124    reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
    125  }
    126 }