1 /*
   2  * Copyright 2009 Google, 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 6582946
  27  * @summary Test the primitive wrappers compare and compareTo methods
  28  * @key randomness
  29  */
  30 
  31 import java.util.Random;
  32 
  33 public class Compare {
  34 
  35     final Random rnd = new Random();
  36 
  37     boolean toBoolean(long x) { return x > 0; }
  38 
  39     void compareAll(long x, long y) {
  40         check(Double.compare(x, y) ==
  41               Double.valueOf(x).compareTo(Double.valueOf(y)));
  42         check(Float.compare(x, y) ==
  43               Float.valueOf(x).compareTo(Float.valueOf(y)));
  44         check(Long.compare(x, y) ==
  45               Long.valueOf(x).compareTo(Long.valueOf(y)));
  46         check(Integer.compare((int) x, (int) y) ==
  47               Integer.valueOf((int) x).compareTo(Integer.valueOf((int) y)));
  48         check(Short.compare((short) x, (short) y) ==
  49               Short.valueOf((short) x).compareTo(Short.valueOf((short) y)));
  50         check(Character.compare((char) x, (char) y) ==
  51               Character.valueOf((char) x).compareTo(Character.valueOf((char) y)));
  52         check(Byte.compare((byte) x, (byte) y) ==
  53               Byte.valueOf((byte) x).compareTo(Byte.valueOf((byte) y)));
  54         check(Boolean.compare(toBoolean(x), toBoolean(y)) ==
  55               Boolean.valueOf(toBoolean(x)).compareTo(Boolean.valueOf(toBoolean(y))));
  56 
  57         check(Double.compare(x, y) == -Double.compare(y, x));
  58         check(Float.compare(x, y) == -Float.compare(y, x));
  59         check(Long.compare(x, y) == -Long.compare(y, x));
  60         check(Integer.compare((int) x, (int) y) ==
  61               -Integer.compare((int) y, (int) x));
  62         check(Short.compare((short) x, (short) y) ==
  63               -Short.compare((short) y, (short) x));
  64         check(Character.compare((char) x, (char) y) ==
  65               -Character.compare((char) y, (char) x));
  66         check(Byte.compare((byte) x, (byte) y) ==
  67               -Byte.compare((byte) y, (byte) x));
  68 
  69         equal(Long.compare(x, y),
  70               x < y ? -1 : x > y ? 1 : 0);
  71 
  72         {
  73             int a = (int) x, b = (int) y;
  74             equal(Integer.compare(a, b),
  75                   a < b ? -1 : a > b ? 1 : 0);
  76         }
  77 
  78         {
  79             short a = (short) x, b = (short) y;
  80             equal(Short.compare(a, b),
  81                   a - b);
  82         }
  83 
  84         {
  85             char a = (char) x, b = (char) y;
  86             equal(Character.compare(a, b),
  87                   a - b);
  88         }
  89 
  90         {
  91             byte a = (byte) x, b = (byte) y;
  92             equal(Byte.compare(a, b),
  93                   a - b);
  94         }
  95 
  96         {
  97             boolean a = toBoolean(x), b = toBoolean(y);
  98             equal(Boolean.compare(a, b),
  99                   a == b ? 0 : a ? 1 : -1);
 100         }
 101     }
 102 
 103     void test(String args[]) throws Exception {
 104         long[] longs = {
 105             Long.MIN_VALUE,
 106             Integer.MIN_VALUE,
 107             Short.MIN_VALUE,
 108             Character.MIN_VALUE,
 109             Byte.MIN_VALUE,
 110             -1, 0, 1,
 111             Byte.MAX_VALUE,
 112             Character.MAX_VALUE,
 113             Short.MAX_VALUE,
 114             Integer.MAX_VALUE,
 115             Long.MAX_VALUE,
 116             rnd.nextLong(),
 117             rnd.nextInt(),
 118         };
 119 
 120         for (long x : longs) {
 121             for (long y : longs) {
 122                 compareAll(x, y);
 123             }
 124         }
 125     }
 126 
 127     //--------------------- Infrastructure ---------------------------
 128     volatile int passed = 0, failed = 0;
 129     void pass() {passed++;}
 130     void fail() {failed++; Thread.dumpStack();}
 131     void fail(String msg) {System.err.println(msg); fail();}
 132     void unexpected(Throwable t) {failed++; t.printStackTrace();}
 133     void check(boolean cond) {if (cond) pass(); else fail();}
 134     void equal(Object x, Object y) {
 135         if (x == null ? y == null : x.equals(y)) pass();
 136         else fail(x + " not equal to " + y);}
 137     public static void main(String[] args) throws Throwable {
 138         new Compare().instanceMain(args);}
 139     public void instanceMain(String[] args) throws Throwable {
 140         try {test(args);} catch (Throwable t) {unexpected(t);}
 141         System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
 142         if (failed > 0) throw new AssertionError("Some tests failed");}
 143 }