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