js/src/tests/js1_5/Regress/regress-103602.js@6474c204b198
js/src/tests/js1_5/Regress/regress-103602.js
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 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/. */
6 /*
7 *
8 * Date: 10 Jan 2002
9 * SUMMARY: Reassignment to a const is NOT an error per ECMA
10 * See http://bugzilla.mozilla.org/show_bug.cgi?id=103602
11 *
12 * ------- Additional Comment #4 From Brendan Eich 2002-01-10 15:30 -------
13 *
14 * That's per ECMA (don't blame me, I fought for what Netscape always did:
15 * throw an error [could be a catchable exception since 1.3]).
16 * Readonly properties, when set by assignment, are not changed, but no error
17 * or exception is thrown. The value of the assignment expression is the value
18 * of the r.h.s.
19 *
20 * If you want a *strict* warning, pls change the summary of this bug
21 * to say so.
22 */
23 //-----------------------------------------------------------------------------
24 var UBound = 0;
25 var BUGNUMBER = 103602;
26 var summary = 'Reassignment to a const is NOT an error per ECMA';
27 var status = '';
28 var statusitems = [];
29 var actual = '';
30 var actualvalues = [];
31 var expect= '';
32 var expectedvalues = [];
33 var cnFAIL_1 = 'Redeclaration of a const FAILED to cause an error';
34 var cnFAIL_2 = 'Reassigning to a const caused an ERROR! It should not!!!';
35 var sEval = '';
37 /*
38 * Not every implementation supports const (a non-ECMA extension)
39 * For example, Rhino does not; it would generate a complile-time error.
40 * So we have to hide this so it will be detected at run-time instead.
41 */
42 try
43 {
44 sEval = 'const one = 1';
45 eval(sEval);
46 }
47 catch(e)
48 {
49 quit(); // if const is not supported, this testcase is over -
50 }
53 status = inSection(1);
54 try
55 {
56 /*
57 * Redeclaration of const should be a compile-time error.
58 * Hide so it will be detected at run-time.
59 */
60 sEval = 'const one = 2;';
61 eval(sEval);
63 expect = ''; // we shouldn't reach this line
64 actual = cnFAIL_1;
65 addThis();
66 }
67 catch(e)
68 {
69 // good - we should be here.
70 actual = expect;
71 addThis();
72 }
75 status = inSection(2);
76 try
77 {
78 /*
79 * Reassignment to a const should be NOT be an error, per ECMA.
80 */
81 one = 2;
82 actual = expect; // good: no error was generated
83 addThis();
85 // although no error, the assignment should have been ignored -
86 status = inSection(3);
87 actual = one;
88 expect = 1;
89 addThis();
91 // the value of the EXPRESSION, however, is the value of the r.h.s. -
92 status = inSection(4);
93 actual = (one = 2);
94 expect = 2;
95 addThis();
96 }
98 catch(e)
99 {
100 // BAD - we shouldn't be here
101 expect = '';
102 actual = cnFAIL_2;
103 addThis();
104 }
108 //-----------------------------------------------------------------------------
109 test();
110 //-----------------------------------------------------------------------------
113 function addThis()
114 {
115 statusitems[UBound] = status;
116 actualvalues[UBound] = actual;
117 expectedvalues[UBound] = expect;
118 UBound++;
119 }
122 function test()
123 {
124 enterFunc ('test');
125 printBugNumber(BUGNUMBER);
126 printStatus (summary);
128 for (var i = 0; i < UBound; i++)
129 {
130 reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
131 }
133 exitFunc ('test');
134 }
