Quelle TestValueExact.java Sprache: JAVA

/*
* Copyright (c) 2011, 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.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/

/*
* @test
* @bug 6371401
* @summary Tests of fooValueExact methods
* @author Joseph D. Darcy
*/
import java.math.BigInteger;

public class TestValueExact {
    public static void main(String... args) {
        int errors = 0;

        errors += testLongValueExact();
        errors += testIntValueExact();
        errors += testShortValueExact();
        errors += testByteValueExact();

        if (errors > 0)
            throw new RuntimeException();
    }

    private static int testLongValueExact() {
        int errors = 0;
        BigInteger[] inRange = {
            BigInteger.valueOf(Long.MIN_VALUE),
            BigInteger.ZERO,
            BigInteger.valueOf(Long.MAX_VALUE)
        };

        BigInteger[] outOfRange = {
            BigInteger.valueOf(Long.MIN_VALUE).subtract(BigInteger.ONE),
            BigInteger.valueOf(Long.MAX_VALUE).add(BigInteger.ONE)
        };

        for (BigInteger bi : inRange) {
            if (bi.longValueExact() != bi.longValue()) {
                System.err.println("Mismatching int conversion for " + bi);
                errors++;
            }
        }

        for (BigInteger bi : outOfRange) {
            try {
                long value = bi.longValueExact();
                System.err.println("Failed to get expected exception on " +
                                   bi + " got " + value);
                errors++;
            } catch(ArithmeticException ae) {
                ; // Expected
            }
        }
        return errors;
    }

    private static int testIntValueExact() {
        int errors = 0;
        BigInteger[] inRange = {
            BigInteger.valueOf(Integer.MIN_VALUE),
            BigInteger.ZERO,
            BigInteger.ONE,
            BigInteger.TEN,
            BigInteger.valueOf(Integer.MAX_VALUE)
        };

        BigInteger[] outOfRange = {
            BigInteger.valueOf((long)Integer.MIN_VALUE - 1),
            BigInteger.valueOf((long)Integer.MAX_VALUE + 1)
        };

        for (BigInteger bi : inRange) {
            if (bi.intValueExact() != bi.intValue()) {
                System.err.println("Mismatching int conversion for " + bi);
                errors++;
            }
        }

        for (BigInteger bi : outOfRange) {
            try {
                int value = bi.intValueExact();
                System.err.println("Failed to get expected exception on " +
                                   bi + " got " + value);
                errors++;
            } catch(ArithmeticException ae) {
                ; // Expected
            }
        }
        return errors;
    }

    private static int testShortValueExact() {
        int errors = 0;
        BigInteger[] inRange = {
            BigInteger.valueOf(Short.MIN_VALUE),
            BigInteger.ZERO,
            BigInteger.ONE,
            BigInteger.TEN,
            BigInteger.valueOf(Short.MAX_VALUE)
        };

        BigInteger[] outOfRange = {
            BigInteger.valueOf((long)Integer.MIN_VALUE - 1),
            BigInteger.valueOf((long)Integer.MIN_VALUE),
            BigInteger.valueOf(   (int)Short.MIN_VALUE - 1),
            BigInteger.valueOf(   (int)Short.MAX_VALUE + 1),
            BigInteger.valueOf((long)Integer.MAX_VALUE),
            BigInteger.valueOf((long)Integer.MAX_VALUE + 1)
        };

        for (BigInteger bi : inRange) {
            if (bi.shortValueExact() != bi.shortValue()) {
                System.err.println("Mismatching short conversion for " + bi);
                errors++;
            }
        }

        for (BigInteger bi : outOfRange) {
            try {
                int value = bi.shortValueExact();
                System.err.println("Failed to get expected exception on " +
                                   bi + " got " + value);
                errors++;
            } catch(ArithmeticException ae) {
                ; // Expected
            }
        }
        return errors;
    }

    private static int testByteValueExact() {
        int errors = 0;
        BigInteger[] inRange = {
            BigInteger.valueOf(Byte.MIN_VALUE),
            BigInteger.valueOf(0),
            BigInteger.ONE,
            BigInteger.TEN,
            BigInteger.valueOf(Byte.MAX_VALUE)
        };

        BigInteger[] outOfRange = {
            BigInteger.valueOf((long)Integer.MIN_VALUE - 1),
            BigInteger.valueOf((long)Integer.MIN_VALUE),
            BigInteger.valueOf(   (int)Short.MIN_VALUE - 1),
            BigInteger.valueOf(   (int)Short.MIN_VALUE),
            BigInteger.valueOf(    (int)Byte.MIN_VALUE - 1),
            BigInteger.valueOf(    (int)Byte.MAX_VALUE + 1),
            BigInteger.valueOf(   (int)Short.MAX_VALUE + 1),
            BigInteger.valueOf(   (int)Short.MAX_VALUE),
            BigInteger.valueOf((long)Integer.MAX_VALUE),
            BigInteger.valueOf((long)Integer.MAX_VALUE + 1)
        };

        for (BigInteger bi : inRange) {
            if (bi.byteValueExact() != bi.byteValue()) {
                System.err.println("Mismatching byte conversion for " + bi);
                errors++;
            }
        }

        for (BigInteger bi : outOfRange) {
            try {
                int value = bi.byteValueExact();
                System.err.println("Failed to get expected exception on " +
                                   bi + " got " + value);
                errors++;
            } catch(ArithmeticException ae) {
                ; // Expected
            }
        }
        return errors;
    }
}

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