/*

 * 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.

 */

/*

 * This file is available under and governed by the GNU General Public

 * License version 2 only, as published by the Free Software Foundation.

 * However, the following notice accompanied the original version of this

 * file:

 *

 * Written by Doug Lea and Martin Buchholz with assistance from

 * members of JCP JSR-166 Expert Group and released to the public

 * domain, as explained at

 * http://creativecommons.org/publicdomain/zero/1.0/

 */

import static java.util.concurrent.TimeUnit.DAYS;

import static java.util.concurrent.TimeUnit.HOURS;

import static java.util.concurrent.TimeUnit.MICROSECONDS;

import static java.util.concurrent.TimeUnit.MILLISECONDS;

import static java.util.concurrent.TimeUnit.MINUTES;

import static java.util.concurrent.TimeUnit.NANOSECONDS;

import static java.util.concurrent.TimeUnit.SECONDS;

import java.time.temporal.ChronoUnit;

import java.util.concurrent.TimeUnit;

import junit.framework.Test;

import junit.framework.TestSuite;

public class TimeUnit8Test extends JSR166TestCase {

    public static void main(String[] args) {

        main(suite(), args);

    }

    public static Test suite() {

        return new TestSuite(TimeUnit8Test.class);

    }

    /**

     * tests for toChronoUnit.

     */

    public void testToChronoUnit() throws Exception {

        assertSame(ChronoUnit.NANOS,   NANOSECONDS.toChronoUnit());

        assertSame(ChronoUnit.MICROS,  MICROSECONDS.toChronoUnit());

        assertSame(ChronoUnit.MILLIS,  MILLISECONDS.toChronoUnit());

        assertSame(ChronoUnit.SECONDS, SECONDS.toChronoUnit());

        assertSame(ChronoUnit.MINUTES, MINUTES.toChronoUnit());

        assertSame(ChronoUnit.HOURS,   HOURS.toChronoUnit());

        assertSame(ChronoUnit.DAYS,    DAYS.toChronoUnit());

        // Every TimeUnit has a defined ChronoUnit equivalent

        for (TimeUnit x : TimeUnit.values())

            assertSame(x, TimeUnit.of(x.toChronoUnit()));

    }

    /**

     * tests for TimeUnit.of(ChronoUnit).

     */

    public void testTimeUnitOf() throws Exception {

        assertSame(NANOSECONDS,  TimeUnit.of(ChronoUnit.NANOS));

        assertSame(MICROSECONDS, TimeUnit.of(ChronoUnit.MICROS));

        assertSame(MILLISECONDS, TimeUnit.of(ChronoUnit.MILLIS));

        assertSame(SECONDS,      TimeUnit.of(ChronoUnit.SECONDS));

        assertSame(MINUTES,      TimeUnit.of(ChronoUnit.MINUTES));

        assertSame(HOURS,        TimeUnit.of(ChronoUnit.HOURS));

        assertSame(DAYS,         TimeUnit.of(ChronoUnit.DAYS));

        assertThrows(NullPointerException.class,

                     () -> TimeUnit.of((ChronoUnit)null));

        // ChronoUnits either round trip to their TimeUnit

        // equivalents, or throw IllegalArgumentException.

        for (ChronoUnit cu : ChronoUnit.values()) {

            final TimeUnit tu;

            try {

                tu = TimeUnit.of(cu);

            } catch (IllegalArgumentException acceptable) {

                continue;

            }

            assertSame(cu, tu.toChronoUnit());

        }

    }

}