/*

 * Copyright (c) 2005, 2006, 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

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 * questions.

 */

/* @test

 * @bug 5057341 6363898

 * @summary Basic tests for TimeUnit

 * @author Martin Buchholz

 */

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.io.ByteArrayInputStream;

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.ObjectOutputStream;

import java.io.ObjectInputStream;

import java.util.Arrays;

import java.util.concurrent.TimeUnit;

public class Basic {

    private static void realMain(String[] args) throws Throwable {

        for (TimeUnit u : TimeUnit.values()) {

            System.out.println(u);

            check(u instanceof TimeUnit);

            equal(42L, u.convert(42, u));

            for (TimeUnit v : TimeUnit.values())

                if (u.convert(42, v) >= 42)

                    equal(42L, v.convert(u.convert(42, v), u));

            check(readObject(serializedForm(u)) == u);

        }

        equal(  24L, HOURS.convert       (1, DAYS));

        equal(  60L, MINUTES.convert     (1, HOURS));

        equal(  60L, SECONDS.convert     (1, MINUTES));

        equal(1000L, MILLISECONDS.convert(1, SECONDS));

        equal(1000L, MICROSECONDS.convert(1, MILLISECONDS));

        equal(1000L, NANOSECONDS.convert (1, MICROSECONDS));

        equal(  24L, DAYS.toHours(1));

        equal(  60L, HOURS.toMinutes(1));

        equal(  60L, MINUTES.toSeconds(1));

        equal(1000L, SECONDS.toMillis(1));

        equal(1000L, MILLISECONDS.toMicros(1));

        equal(1000L, MICROSECONDS.toNanos(1));

        long t0 = System.nanoTime();

        MILLISECONDS.sleep(3); /* See windows bug 6313903, might not sleep */

        long elapsedMillis = (System.nanoTime() - t0)/(1000L * 1000L);

        System.out.printf("elapsed=%d%n", elapsedMillis);

        check(elapsedMillis >= 0);

        /* Might not sleep on windows: check(elapsedMillis >= 3); */

        check(elapsedMillis < 1000);

        //----------------------------------------------------------------

        // Tests for serialized form compatibility with previous release

        //----------------------------------------------------------------

        byte[] serializedForm = /* Generated using tiger */

            {-84, -19, 0, 5, '~', 'r', 0, 29, 'j', 'a', 'v', 'a', '.',

             'u', 't', 'i', 'l', '.', 'c', 'o', 'n', 'c', 'u', 'r', 'r', 'e',

             'n', 't', '.', 'T', 'i', 'm', 'e', 'U', 'n', 'i', 't', 0, 0,

             0, 0, 0, 0, 0, 0, 18, 0, 0, 'x', 'r', 0, 14,

             'j', 'a', 'v', 'a', '.', 'l', 'a', 'n', 'g', '.', 'E', 'n', 'u',

             'm', 0, 0, 0, 0, 0, 0, 0, 0, 18, 0, 0, 'x',

             'p', 't', 0, 7, 'S', 'E', 'C', 'O', 'N', 'D', 'S', };

        check(Arrays.equals(serializedForm(SECONDS), serializedForm));

    }

    //--------------------- Infrastructure ---------------------------

    static volatile int passed = 0, failed = 0;

    static void pass() {passed++;}

    static void fail() {failed++; Thread.dumpStack();}

    static void fail(String msg) {System.out.println(msg); fail();}

    static void unexpected(Throwable t) {failed++; t.printStackTrace();}

    static void check(boolean cond) {if (cond) pass(); else fail();}

    static void equal(Object x, Object y) {

        if (x == null ? y == null : x.equals(y)) pass();

        else fail(x + " not equal to " + y);}

    public static void main(String[] args) throws Throwable {

        try {realMain(args);} catch (Throwable t) {unexpected(t);}

        System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);

        if (failed > 0) throw new AssertionError("Some tests failed");}

    static byte[] serializedForm(Object obj) throws IOException {

        ByteArrayOutputStream baos = new ByteArrayOutputStream();

        new ObjectOutputStream(baos).writeObject(obj);

        return baos.toByteArray();

    }

    static Object readObject(byte[] bytes)

        throws IOException, ClassNotFoundException {

        InputStream is = new ByteArrayInputStream(bytes);

        return new ObjectInputStream(is).readObject();

    }

}