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
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9* Software distributed under the License is distributed on an "AS IS" basis,
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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) 2002
18* the Initial Developer. All Rights Reserved.
19*
20* Contributor(s): felix.meschberger@day.com, pschwartau@netscape.com
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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
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35*
36*
37* Date:    25 November 2002
38* SUMMARY: Testing scope
39* See http://bugzilla.mozilla.org/show_bug.cgi?id=181834
40*
41* This bug only bit in Rhino interpreted mode, when the
42* 'compile functions with dynamic scope' feature was set.
43*
44*/
45//-----------------------------------------------------------------------------
46var UBound = 0;
47var bug = 181834;
48var summary = 'Testing scope';
49var status = '';
50var statusitems = [];
51var actual = '';
52var actualvalues = [];
53var expect= '';
54var expectedvalues = [];
55
56
57/*
58 * If N<=0, |outer_d| just gets incremented once,
59 * so the return value should be 1 in this case.
60 *
61 * If N>0, we end up calling inner() N+1 times:
62 * inner(N), inner(N-1), ... , inner(0).
63 *
64 * Each call to inner() increments |outer_d| by 1.
65 * The last call, inner(0), returns the final value
66 * of |outer_d|, which should be N+1.
67 */
68function outer(N)
69{
70  var outer_d = 0;
71  return inner(N);
72
73  function inner(level)
74  {
75    outer_d++;
76
77    if (level > 0)
78      return inner(level - 1);
79    else
80      return outer_d;
81  }
82}
83
84
85/*
86 * This only has meaning in Rhino -
87 */
88setDynamicScope(true);
89
90/*
91 * Recompile the function |outer| via eval() in order to
92 * feel the effect of the dynamic scope mode we have set.
93 */
94var s = outer.toString();
95eval(s);
96
97status = inSection(1);
98actual = outer(-5);
99expect = 1;
100addThis();
101
102status = inSection(2);
103actual = outer(0);
104expect = 1;
105addThis();
106
107status = inSection(3);
108actual = outer(5);
109expect = 6;
110addThis();
111
112
113/*
114 * Sanity check: do same steps with the dynamic flag off
115 */
116setDynamicScope(false);
117
118/*
119 * Recompile the function |outer| via eval() in order to
120 * feel the effect of the dynamic scope mode we have set.
121 */
122eval(s);
123
124status = inSection(4);
125actual = outer(-5);
126expect = 1;
127addThis();
128
129status = inSection(5);
130actual = outer(0);
131expect = 1;
132addThis();
133
134status = inSection(6);
135actual = outer(5);
136expect = 6;
137addThis();
138
139
140
141//-----------------------------------------------------------------------------
142test();
143//-----------------------------------------------------------------------------
144
145
146
147function setDynamicScope(flag)
148{
149  if (this.Packages)
150  {
151    var cx = this.Packages.org.mozilla.javascript.Context.getCurrentContext();
152    cx.setCompileFunctionsWithDynamicScope(flag);
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