1 /*
2 * Copyright 2003 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 4916097
27 * @summary Some exponent over/undeflow tests for the pow method
28 * @author Joseph D. Darcy
29 */
30
31 import java.math.*;
32
33 public class PowTests {
34 static int zeroAndOneTests() {
35 int failures = 0;
36
37 BigDecimal[][] testCases = {
38 {BigDecimal.valueOf(0, Integer.MAX_VALUE), new BigDecimal(0), BigDecimal.valueOf(1, 0)},
39 {BigDecimal.valueOf(0, Integer.MAX_VALUE), new BigDecimal(1), BigDecimal.valueOf(0, Integer.MAX_VALUE)},
40 {BigDecimal.valueOf(0, Integer.MAX_VALUE), new BigDecimal(2), BigDecimal.valueOf(0, Integer.MAX_VALUE)},
41 {BigDecimal.valueOf(0, Integer.MAX_VALUE), new BigDecimal(999999999), BigDecimal.valueOf(0, Integer.MAX_VALUE)},
42
43 {BigDecimal.valueOf(0, Integer.MIN_VALUE), new BigDecimal(0), BigDecimal.valueOf(1, 0)},
44 {BigDecimal.valueOf(0, Integer.MIN_VALUE), new BigDecimal(1), BigDecimal.valueOf(0, Integer.MIN_VALUE)},
45 {BigDecimal.valueOf(0, Integer.MIN_VALUE), new BigDecimal(2), BigDecimal.valueOf(0, Integer.MIN_VALUE)},
46 {BigDecimal.valueOf(0, Integer.MIN_VALUE), new BigDecimal(999999999), BigDecimal.valueOf(0, Integer.MIN_VALUE)},
47
48 {BigDecimal.valueOf(1, Integer.MAX_VALUE), new BigDecimal(0), BigDecimal.valueOf(1, 0)},
49 {BigDecimal.valueOf(1, Integer.MAX_VALUE), new BigDecimal(1), BigDecimal.valueOf(1, Integer.MAX_VALUE)},
50 {BigDecimal.valueOf(1, Integer.MAX_VALUE), new BigDecimal(2), null}, // overflow
51 {BigDecimal.valueOf(1, Integer.MAX_VALUE), new BigDecimal(999999999), null}, // overflow
52
53 {BigDecimal.valueOf(1, Integer.MIN_VALUE), new BigDecimal(0), BigDecimal.valueOf(1, 0)},
54 {BigDecimal.valueOf(1, Integer.MIN_VALUE), new BigDecimal(1), BigDecimal.valueOf(1, Integer.MIN_VALUE)},
55 {BigDecimal.valueOf(1, Integer.MIN_VALUE), new BigDecimal(2), null}, // underflow
56 {BigDecimal.valueOf(1, Integer.MIN_VALUE), new BigDecimal(999999999), null}, // underflow
57 };
58
59 for(BigDecimal[] testCase: testCases) {
60 int exponent = testCase[1].intValueExact();
61 BigDecimal result;
62
63 try{
64 result = testCase[0].pow(exponent);
65 if (!result.equals(testCase[2]) ) {
66 failures++;
67 System.err.println("Unexpected result while raising " +
68 testCase[0] +
69 " to the " + exponent + " power; expected " +
70 testCase[2] + ", got " + result + ".");
71 }
72 } catch (ArithmeticException e) {
73 if (testCase[2] != null) {
74 failures++;
75 System.err.println("Unexpected exception while raising " + testCase[0] +
76 " to the " + exponent + " power.");
77
78 }
79 }
80 }
81
82 return failures;
83 }
84
85 public static void main(String argv[]) {
86 int failures = 0;
87
88 failures += zeroAndOneTests();
89
90 if (failures > 0) {
91 throw new RuntimeException("Incurred " + failures +
92 " failures while testing pow methods.");
93 }
94 }
95
96 }