1/* ***** BEGIN LICENSE BLOCK *****
2* Version: NPL 1.1/GPL 2.0/LGPL 2.1
3*
4* The contents of this file are subject to the Netscape Public License
5* Version 1.1 (the "License"); you may not use this file except in
6* compliance with the License. You may obtain a copy of the License at
7* http://www.mozilla.org/NPL/
8*
9* Software distributed under the License is distributed on an "AS IS" basis,
10* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
11* for the specific language governing rights and limitations under the
12* License.
13*
14* The Original Code is JavaScript Engine testing utilities.
15*
16* The Initial Developer of the Original Code is Netscape Communications Corp.
17* Portions created by the Initial Developer are Copyright (C) 2003
18* the Initial Developer. All Rights Reserved.
19*
20* Contributor(s): igor@icesoft.no, pschwartau@netscape.com
21*
22* Alternatively, the contents of this file may be used under the terms of
23* either the GNU General Public License Version 2 or later (the "GPL"), or
24* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
25* in which case the provisions of the GPL or the LGPL are applicable instead
26* of those above. If you wish to allow use of your version of this file only
27* under the terms of either the GPL or the LGPL, and not to allow others to
28* use your version of this file under the terms of the NPL, indicate your
29* decision by deleting the provisions above and replace them with the notice
30* and other provisions required by the GPL or the LGPL. If you do not delete
31* the provisions above, a recipient may use your version of this file under
32* the terms of any one of the NPL, the GPL or the LGPL.
33*
34* ***** END LICENSE BLOCK *****
35*
36*
37* Date:    06 February 2003
38* SUMMARY: Using |instanceof| to check if function is called as a constructor
39*
40* See http://bugzilla.mozilla.org/show_bug.cgi?id=192105
41*
42*/
43//-----------------------------------------------------------------------------
44var UBound = 0;
45var bug = 192105;
46var summary = 'Using |instanceof| to check if f() is called as constructor';
47var status = '';
48var statusitems = [];
49var actual = '';
50var actualvalues = [];
51var expect= '';
52var expectedvalues = [];
53
54
55/*
56 * This function is the heart of the test. It sets the result
57 * variable |actual|, which we will compare against |expect|.
58 *
59 * Note |actual| will be set to |true| or |false| according
60 * to whether or not this function is called as a constructor;
61 * i.e. whether it is called via the |new| keyword or not -
62 */
63function f()
64{
65  actual = (this instanceof f);
66}
67
68
69/*
70 * Call f as a constructor from global scope
71 */
72status = inSection(1);
73new f(); // sets |actual|
74expect = true;
75addThis();
76
77/*
78 * Now, not as a constructor
79 */
80status = inSection(2);
81f(); // sets |actual|
82expect = false;
83addThis();
84
85
86/*
87 * Call f as a constructor from function scope
88 */
89function F()
90{
91  new f();
92}
93status = inSection(3);
94F(); // sets |actual|
95expect = true;
96addThis();
97
98/*
99 * Now, not as a constructor
100 */
101function G()
102{
103  f();
104}
105status = inSection(4);
106G(); // sets |actual|
107expect = false;
108addThis();
109
110
111/*
112 * Now make F() and G() methods of an object
113 */
114var obj = {F:F, G:G};
115status = inSection(5);
116obj.F(); // sets |actual|
117expect = true;
118addThis();
119
120status = inSection(6);
121obj.G(); // sets |actual|
122expect = false;
123addThis();
124
125
126/*
127 * Now call F() and G() from yet other functions, and use eval()
128 */
129function A()
130{
131  eval('F();');
132}
133status = inSection(7);
134A(); // sets |actual|
135expect = true;
136addThis();
137
138
139function B()
140{
141  eval('G();');
142}
143status = inSection(8);
144B(); // sets |actual|
145expect = false;
146addThis();
147
148
149
150
151//-----------------------------------------------------------------------------
152test();
153//-----------------------------------------------------------------------------
154
155
156
157function addThis()
158{
159  statusitems[UBound] = status;
160  actualvalues[UBound] = actual;
161  expectedvalues[UBound] = expect;
162  UBound++;
163}
164
165
166function test()
167{
168  enterFunc('test');
169  printBugNumber(bug);
170  printStatus(summary);
171
172  for (var i=0; i<UBound; i++)
173  {
174    reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
175  }
176
177  exitFunc ('test');
178}
179