1 /*
   2  * Copyright 2006 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 6473768
  27  * @summary Tests of BigDecimal.compareTo
  28  * @author Joseph D. Darcy
  29  */
  30 import java.math.*;
  31 import static java.math.BigDecimal.*;
  32 
  33 public class CompareToTests {
  34     private static int compareToTests() {
  35         int failures = 0;
  36 
  37         final BigDecimal MINUS_ONE = BigDecimal.ONE.negate();
  38 
  39         // First operand, second operand, expected compareTo result
  40         BigDecimal [][] testCases = {
  41             // Basics
  42             {valueOf(0),        valueOf(0),     ZERO},
  43             {valueOf(0),        valueOf(1),     MINUS_ONE},
  44             {valueOf(1),        valueOf(2),     MINUS_ONE},
  45             {valueOf(2),        valueOf(1),     ONE},
  46             {valueOf(10),       valueOf(10),    ZERO},
  47 
  48             // Significands would compare differently than scaled value
  49             {valueOf(2,1),      valueOf(2),     MINUS_ONE},
  50             {valueOf(2,-1),     valueOf(2),     ONE},
  51             {valueOf(1,1),      valueOf(2),     MINUS_ONE},
  52             {valueOf(1,-1),     valueOf(2),     ONE},
  53             {valueOf(5,-1),     valueOf(2),     ONE},
  54 
  55             // Boundary and near boundary values
  56             {valueOf(Long.MAX_VALUE),   valueOf(Long.MAX_VALUE),        ZERO},
  57             {valueOf(Long.MAX_VALUE-1), valueOf(Long.MAX_VALUE),        MINUS_ONE},
  58             {valueOf(Long.MIN_VALUE),   valueOf(Long.MAX_VALUE),        MINUS_ONE},
  59             {valueOf(Long.MIN_VALUE+1), valueOf(Long.MAX_VALUE),        MINUS_ONE},
  60             {valueOf(Long.MIN_VALUE),   valueOf(Long.MIN_VALUE),        ZERO},
  61             {valueOf(Long.MIN_VALUE+1), valueOf(Long.MAX_VALUE),        ONE},
  62         };
  63 
  64         for (BigDecimal[] testCase : testCases) {
  65             BigDecimal a = testCase[0];
  66             BigDecimal a_negate = a.negate();
  67             BigDecimal b = testCase[1];
  68             BigDecimal b_negate = b.negate();
  69             int expected = testCase[2].intValue();
  70 
  71             failures += compareToTest(a,        b,         expected);
  72             failures += compareToTest(a_negate, b,        -1);
  73             failures += compareToTest(a,        b_negate,  1);
  74             failures += compareToTest(a_negate, b_negate, -expected);
  75         }
  76 
  77 
  78         return failures;
  79     }
  80 
  81     private static int compareToTest(BigDecimal a, BigDecimal b, int expected) {
  82         int result = a.compareTo(b);
  83         int failed = (result==expected) ? 0 : 1;
  84         if (result == 1) {
  85             System.err.println("(" + a + ").compareTo(" + b + ") => " + result +
  86                                "\n\tExpected " + expected);
  87         }
  88         return result;
  89     }
  90 
  91     public static void main(String argv[]) {
  92         int failures = 0;
  93 
  94         failures += compareToTests();
  95 
  96         if (failures > 0) {
  97             throw new RuntimeException("Incurred " + failures +
  98                                        " failures while testing exact compareTo.");
  99         }
 100     }
 101 }