1 // Tags: JDK1.1

     2 

     3 // Copyright (C) 2005 Roman Kennke

     4 

     5 // This file is part of Mauve.

     6 

     7 // Mauve is free software; you can redistribute it and/or modify

     8 // it under the terms of the GNU General Public License as published by

     9 // the Free Software Foundation; either version 2, or (at your option)

    10 // any later version.

    11 

    12 // Mauve is distributed in the hope that it will be useful,

    13 // but WITHOUT ANY WARRANTY; without even the implied warranty of

    14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    15 // GNU General Public License for more details.

    16 

    17 // You should have received a copy of the GNU General Public License

    18 // along with Mauve; see the file COPYING.  If not, write to

    19 // the Free Software Foundation, 59 Temple Place - Suite 330,

    20 // Boston, MA 02111-1307, USA.  */

    21 

    22 package gnu.testlet.java.util.Properties;

    23 

    24 import gnu.testlet.Testlet;

    25 import gnu.testlet.TestHarness;

    26 import java.util.Properties;

    27 

    28 /**

    29  * Tests if getProperty(String) calls getProperty(String, String) or vice versa

    30  * or if both call an internal method. This is important to avoid infinite

    31  * recursion in derived classes that only implement one of these methods

    32  *

    33  * @author Roman Kennke

    34  */

    35 public class getProperty implements Testlet

    36 {

    37   static class Properties1 extends Properties

    38   {

    39     boolean called = false;

    40     public String getProperty(String key)

    41     {

    42       called = true;

    43       return super.getProperty(key);

    44     }

    45   }

    46 

    47   static class Properties2 extends Properties

    48   {

    49     boolean called = false;

    50     public String getProperty(String key, String def)

    51     {

    52       called = true;

    53       return super.getProperty(key, def);

    54     }

    55   }

    56 

    57   /**

    58    * This should not lead to infinite recursion.

    59    */

    60   static class Properties3 extends Properties

    61   {

    62     public String getProperty(String key, String def)

    63     {

    64       return getProperty(key + "." + def);

    65     }

    66   }

    67 

    68   public void test (TestHarness harness)

    69   {

    70     // First we override getProperty(String) and test if

    71     // getProperty(String, String)  calls this.

    72     Properties1 p1 = new Properties1();

    73     p1.setProperty("key", "value");

    74     p1.called = false;

    75     p1.getProperty("key", "default");

    76     harness.check(p1.called, true,

    77                   "getProperty(String, String) calls getProperty(String)");

    78 

    79     // Now we override getProperty(String, String) and test if

    80     // getProperty(String)  calls this.

    81     Properties2 p2 = new Properties2();

    82     p2.setProperty("key", "value");

    83     p2.called = false;

    84     p2.getProperty("key");

    85     harness.check(p2.called, false,

    86               "getProperty(String) does not call getProperty(String, String)");

    87 

    88     // Now we override getProperty(String, String) so that it calls

    89     // getProperty(String) and test if

    90     // getProperty(String, String) leads to infinite recursion.

    91     Properties3 p3 = new Properties3();

    92     p3.setProperty("key", "value");

    93     try

    94       {

    95         p3.getProperty("key", "def");

    96         harness.check(true, "overriding getProperty(String, String) must not "

    97                       + " lead to inifinite recursion.");

    98       }

    99     catch (Throwable ex)

   100       {

   101         harness.fail("overriding getProperty(String, String) must not "

   102                       + " lead to inifinite recursion.");

   103       }

   104   }

   105 

   106 }