1 /*
   2  * Copyright 2009 Sun Microsystems, Inc.  All Rights Reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  20  * CA 95054 USA or visit www.sun.com if you need additional information or
  21  * have any questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 6797535
  27  * @summary Basic tests for methods in java.util.Objects
  28  * @author  Joseph D. Darcy
  29  */
  30 
  31 import java.util.*;
  32 
  33 public class BasicObjectsTest {
  34     public static void main(String... args) {
  35         int errors = 0;
  36         errors += testEquals();
  37         errors += testHashCode();
  38         errors += testToString();
  39         errors += testCompare();
  40         if (errors > 0 )
  41             throw new RuntimeException();
  42     }
  43 
  44     private static int testEquals() {
  45         int errors = 0;
  46         Object[] values = {null, "42", 42};
  47         for(int i = 0; i < values.length; i++)
  48             for(int j = 0; j < values.length; j++) {
  49                 boolean expected = (i == j);
  50                 Object a = values[i];
  51                 Object b = values[j];
  52                 boolean result = Objects.equals(a, b);
  53                 if (result != expected) {
  54                     errors++;
  55                     System.err.printf("When equating %s to %s, got %b instead of %b%n.",
  56                                       a, b, result, expected);
  57                 }
  58             }
  59         return errors;
  60     }
  61 
  62     private static int testHashCode() {
  63         int errors = 0;
  64         errors += (Objects.hashCode(null) == 0 ) ? 0 : 1;
  65         String s = "42";
  66         errors += (Objects.hashCode(s) == s.hashCode() ) ? 0 : 1;
  67         return errors;
  68     }
  69 
  70     private static int testToString() {
  71         int errors = 0;
  72         errors += ("null".equals(Objects.toString(null)) ) ? 0 : 1;
  73         String s = "Some string";
  74         errors += (s.equals(Objects.toString(s)) ) ? 0 : 1;
  75         return errors;
  76     }
  77 
  78     private static int testCompare() {
  79         int errors = 0;
  80         String[] values = {"e. e. cummings", "zzz"};
  81         String[] VALUES = {"E. E. Cummings", "ZZZ"};
  82         errors += compareTest(null, null, 0);
  83         for(int i = 0; i < values.length; i++) {
  84             String a = values[i];
  85             errors += compareTest(a, a, 0);
  86             for(int j = 0; j < VALUES.length; j++) {
  87                 int expected = Integer.compare(i, j);
  88                 String b = VALUES[j];
  89                 errors += compareTest(a, b, expected);
  90             }
  91         }
  92         return errors;
  93     }
  94 
  95     private static int compareTest(String a, String b, int expected) {
  96         int errors = 0;
  97         int result = Objects.compare(a, b, String.CASE_INSENSITIVE_ORDER);
  98         if (Integer.signum(result) != Integer.signum(expected)) {
  99             errors++;
 100             System.err.printf("When comparing %s to %s, got %d instead of %d%n.",
 101                               a, b, result, expected);
 102         }
 103         return errors;
 104     }
 105 }