97 lines
4.4 KiB
Java
97 lines
4.4 KiB
Java
/*
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* Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 4916097
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* @summary Some exponent over/undeflow tests for the pow method
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* @author Joseph D. Darcy
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*/
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import java.math.*;
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public class PowTests {
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static int zeroAndOneTests() {
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int failures = 0;
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BigDecimal[][] testCases = {
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{BigDecimal.valueOf(0, Integer.MAX_VALUE), new BigDecimal(0), BigDecimal.valueOf(1, 0)},
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{BigDecimal.valueOf(0, Integer.MAX_VALUE), new BigDecimal(1), BigDecimal.valueOf(0, Integer.MAX_VALUE)},
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{BigDecimal.valueOf(0, Integer.MAX_VALUE), new BigDecimal(2), BigDecimal.valueOf(0, Integer.MAX_VALUE)},
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{BigDecimal.valueOf(0, Integer.MAX_VALUE), new BigDecimal(999999999), BigDecimal.valueOf(0, Integer.MAX_VALUE)},
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{BigDecimal.valueOf(0, Integer.MIN_VALUE), new BigDecimal(0), BigDecimal.valueOf(1, 0)},
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{BigDecimal.valueOf(0, Integer.MIN_VALUE), new BigDecimal(1), BigDecimal.valueOf(0, Integer.MIN_VALUE)},
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{BigDecimal.valueOf(0, Integer.MIN_VALUE), new BigDecimal(2), BigDecimal.valueOf(0, Integer.MIN_VALUE)},
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{BigDecimal.valueOf(0, Integer.MIN_VALUE), new BigDecimal(999999999), BigDecimal.valueOf(0, Integer.MIN_VALUE)},
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{BigDecimal.valueOf(1, Integer.MAX_VALUE), new BigDecimal(0), BigDecimal.valueOf(1, 0)},
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{BigDecimal.valueOf(1, Integer.MAX_VALUE), new BigDecimal(1), BigDecimal.valueOf(1, Integer.MAX_VALUE)},
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{BigDecimal.valueOf(1, Integer.MAX_VALUE), new BigDecimal(2), null}, // overflow
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{BigDecimal.valueOf(1, Integer.MAX_VALUE), new BigDecimal(999999999), null}, // overflow
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{BigDecimal.valueOf(1, Integer.MIN_VALUE), new BigDecimal(0), BigDecimal.valueOf(1, 0)},
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{BigDecimal.valueOf(1, Integer.MIN_VALUE), new BigDecimal(1), BigDecimal.valueOf(1, Integer.MIN_VALUE)},
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{BigDecimal.valueOf(1, Integer.MIN_VALUE), new BigDecimal(2), null}, // underflow
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{BigDecimal.valueOf(1, Integer.MIN_VALUE), new BigDecimal(999999999), null}, // underflow
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};
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for(BigDecimal[] testCase: testCases) {
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int exponent = testCase[1].intValueExact();
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BigDecimal result;
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try{
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result = testCase[0].pow(exponent);
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if (!result.equals(testCase[2]) ) {
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failures++;
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System.err.println("Unexpected result while raising " +
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testCase[0] +
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" to the " + exponent + " power; expected " +
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testCase[2] + ", got " + result + ".");
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}
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} catch (ArithmeticException e) {
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if (testCase[2] != null) {
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failures++;
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System.err.println("Unexpected exception while raising " + testCase[0] +
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" to the " + exponent + " power.");
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}
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}
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}
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return failures;
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}
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public static void main(String argv[]) {
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int failures = 0;
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failures += zeroAndOneTests();
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if (failures > 0) {
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throw new RuntimeException("Incurred " + failures +
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" failures while testing pow methods.");
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}
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}
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}
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