/*

 * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

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 */

/*

 * @test

 * @bug 4916097

 * @summary Some exponent over/undeflow tests for the pow method

 * @author Joseph D. Darcy

 */

import java.math.*;

public class PowTests {

    static int zeroAndOneTests() {

        int failures = 0;

        BigDecimal[][] testCases = {

            {BigDecimal.valueOf(0, Integer.MAX_VALUE),  new BigDecimal(0),              BigDecimal.valueOf(1, 0)},

            {BigDecimal.valueOf(0, Integer.MAX_VALUE),  new BigDecimal(1),              BigDecimal.valueOf(0, Integer.MAX_VALUE)},

            {BigDecimal.valueOf(0, Integer.MAX_VALUE),  new BigDecimal(2),              BigDecimal.valueOf(0, Integer.MAX_VALUE)},

            {BigDecimal.valueOf(0, Integer.MAX_VALUE),  new BigDecimal(999999999),      BigDecimal.valueOf(0, Integer.MAX_VALUE)},

            {BigDecimal.valueOf(0, Integer.MIN_VALUE),  new BigDecimal(0),              BigDecimal.valueOf(1, 0)},

            {BigDecimal.valueOf(0, Integer.MIN_VALUE),  new BigDecimal(1),              BigDecimal.valueOf(0, Integer.MIN_VALUE)},

            {BigDecimal.valueOf(0, Integer.MIN_VALUE),  new BigDecimal(2),              BigDecimal.valueOf(0, Integer.MIN_VALUE)},

            {BigDecimal.valueOf(0, Integer.MIN_VALUE),  new BigDecimal(999999999),      BigDecimal.valueOf(0, Integer.MIN_VALUE)},

            {BigDecimal.valueOf(1, Integer.MAX_VALUE),  new BigDecimal(0),              BigDecimal.valueOf(1, 0)},

            {BigDecimal.valueOf(1, Integer.MAX_VALUE),  new BigDecimal(1),              BigDecimal.valueOf(1, Integer.MAX_VALUE)},

            {BigDecimal.valueOf(1, Integer.MAX_VALUE),  new BigDecimal(2),              null}, // overflow

            {BigDecimal.valueOf(1, Integer.MAX_VALUE),  new BigDecimal(999999999),      null}, // overflow

            {BigDecimal.valueOf(1, Integer.MIN_VALUE),  new BigDecimal(0),              BigDecimal.valueOf(1, 0)},

            {BigDecimal.valueOf(1, Integer.MIN_VALUE),  new BigDecimal(1),              BigDecimal.valueOf(1, Integer.MIN_VALUE)},

            {BigDecimal.valueOf(1, Integer.MIN_VALUE),  new BigDecimal(2),              null}, // underflow

            {BigDecimal.valueOf(1, Integer.MIN_VALUE),  new BigDecimal(999999999),      null}, // underflow

        };

        for(BigDecimal[] testCase: testCases) {

            int exponent = testCase[1].intValueExact();

            BigDecimal result;

            try{

                result = testCase[0].pow(exponent);

                if (!result.equals(testCase[2]) ) {

                    failures++;

                    System.err.println("Unexpected result while raising " +

                                       testCase[0] +

                                       " to the " + exponent + " power; expected " +

                                       testCase[2] + ", got " + result + ".");

                }

            } catch (ArithmeticException e) {

                if (testCase[2] != null) {

                    failures++;

                    System.err.println("Unexpected exception while raising " + testCase[0] +

                                       " to the " + exponent + " power.");

                }

            }

        }

        return failures;

    }

    public static void main(String argv[]) {

        int failures = 0;

        failures += zeroAndOneTests();

        if (failures > 0) {

            throw new RuntimeException("Incurred " + failures +

                                       " failures while testing pow methods.");

        }

    }

}