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      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/
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      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) 2002
     18 * the Initial Developer. All Rights Reserved.
     19 *
     20 * Contributor(s): felix.meschberger (at) day.com, pschwartau (at) 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
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     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:    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 //-----------------------------------------------------------------------------
     46 var UBound = 0;
     47 var bug = 181834;
     48 var summary = 'Testing scope';
     49 var status = '';
     50 var statusitems = [];
     51 var actual = '';
     52 var actualvalues = [];
     53 var expect= '';
     54 var 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  */
     68 function 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  */
     88 setDynamicScope(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  */
     94 var s = outer.toString();
     95 eval(s);
     96 
     97 status = inSection(1);
     98 actual = outer(-5);
     99 expect = 1;
    100 addThis();
    101 
    102 status = inSection(2);
    103 actual = outer(0);
    104 expect = 1;
    105 addThis();
    106 
    107 status = inSection(3);
    108 actual = outer(5);
    109 expect = 6;
    110 addThis();
    111 
    112 
    113 /*
    114  * Sanity check: do same steps with the dynamic flag off
    115  */
    116 setDynamicScope(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  */
    122 eval(s);
    123 
    124 status = inSection(4);
    125 actual = outer(-5);
    126 expect = 1;
    127 addThis();
    128 
    129 status = inSection(5);
    130 actual = outer(0);
    131 expect = 1;
    132 addThis();
    133 
    134 status = inSection(6);
    135 actual = outer(5);
    136 expect = 6;
    137 addThis();
    138 
    139 
    140 
    141 //-----------------------------------------------------------------------------
    142 test();
    143 //-----------------------------------------------------------------------------
    144 
    145 
    146 
    147 function 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 
    157 function addThis()
    158 {
    159   statusitems[UBound] = status;
    160   actualvalues[UBound] = actual;
    161   expectedvalues[UBound] = expect;
    162   UBound++;
    163 }
    164 
    165 
    166 function 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