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

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 *

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 * 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

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 *

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

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/**

 * @test

 * @bug 8211936

 * @summary Tests of BigDecimal.intValueExact

 */

import java.math.*;

import java.util.List;

import java.util.Map;

import static java.util.Map.entry;

public class IntValueExactTests {

    public static void main(String... args) {

        int failures = 0;

        failures += intValueExactSuccessful();

        failures += intValueExactExceptional();

        if (failures > 0) {

            throw new RuntimeException("Incurred " + failures +

                                       " failures while testing intValueExact.");

        }

    }

    private static int simpleIntValueExact(BigDecimal bd) {

        return bd.toBigIntegerExact().intValue();

    }

    private static int intValueExactSuccessful() {

        int failures = 0;

        // Strings used to create BigDecimal instances on which invoking

        // intValueExact() will succeed.

        Map<BigDecimal, Integer> successCases =

            Map.ofEntries(entry(new BigDecimal("2147483647"),    Integer.MAX_VALUE), // 2^31 -1

                          entry(new BigDecimal("2147483647.0"),  Integer.MAX_VALUE),

                          entry(new BigDecimal("2147483647.00"), Integer.MAX_VALUE),

                          entry(new BigDecimal("-2147483648"),   Integer.MIN_VALUE), // -2^31

                          entry(new BigDecimal("-2147483648.0"), Integer.MIN_VALUE),

                          entry(new BigDecimal("-2147483648.00"),Integer.MIN_VALUE),

                          entry(new BigDecimal("1e0"),    1),

                          entry(new BigDecimal(BigInteger.ONE, -9),   1_000_000_000),

                          entry(new BigDecimal("0e13"),   0), // Fast path zero

                          entry(new BigDecimal("0e32"),   0),

                          entry(new BigDecimal("0e512"), 0),

                          entry(new BigDecimal("10.000000000000000000000000000000000"), 10));

        for (var testCase : successCases.entrySet()) {

            BigDecimal bd = testCase.getKey();

            int expected = testCase.getValue();

            try {

                int intValueExact = bd.intValueExact();

                if (expected != intValueExact ||

                    intValueExact != simpleIntValueExact(bd)) {

                    failures++;

                    System.err.println("Unexpected intValueExact result " + intValueExact +

                                       " on " + bd);

                }

            } catch (Exception e) {

                failures++;

                System.err.println("Error on " + bd + "\tException message:" + e.getMessage());

            }

        }

        return failures;

    }

    private static int intValueExactExceptional() {

        int failures = 0;

        List<BigDecimal> exceptionalCases =

            List.of(new BigDecimal("2147483648"), // Integer.MAX_VALUE + 1

                    new BigDecimal("2147483648.0"),

                    new BigDecimal("2147483648.00"),

                    new BigDecimal("-2147483649"), // Integer.MIN_VALUE - 1

                    new BigDecimal("-2147483649.1"),

                    new BigDecimal("-2147483649.01"),

                    new BigDecimal("9999999999999999999999999999999"),

                    new BigDecimal("10000000000000000000000000000000"),

                    new BigDecimal("0.99"),

                    new BigDecimal("0.999999999999999999999"));

        for (BigDecimal bd : exceptionalCases) {

            try {

                int intValueExact = bd.intValueExact();

                failures++;

                System.err.println("Unexpected non-exceptional intValueExact on " + bd);

            } catch (ArithmeticException e) {

                // Success;

            }

        }

        return failures;

    }

}