/*

 * Copyright (c) 2015, 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.

 */

import org.testng.annotations.Test;

import org.testng.Assert;

import java.text.NumberFormat;

import java.text.ParseException;

/*

 * @test

 * @summary Test of diagnostic command VM.uptime

 * @library /testlibrary

 * @modules java.base/sun.misc

 *          java.compiler

 *          java.management

 *          jdk.jvmstat/sun.jvmstat.monitor

 * @run testng UptimeTest

 */

public class UptimeTest {

    public void run(CommandExecutor executor) {

        double someUptime = 1.0;

        long startTime = System.currentTimeMillis();

        try {

            synchronized (this) {

                /* Loop to guard against spurious wake ups */

                while (System.currentTimeMillis() < (startTime + someUptime * 1000)) {

                    wait((int) someUptime * 1000);

                }

            }

        } catch (InterruptedException e) {

            Assert.fail("Test error: Exception caught when sleeping:", e);

        }

        OutputAnalyzer output = executor.execute("VM.uptime");

        output.stderrShouldBeEmpty();

        /*

         * Output should be:

         * [pid]:

         * xx.yyy s

         *

         * If there is only one line in output there is no "[pid]:" printout;

         * skip first line, split on whitespace and grab first half

         */

        int index = output.asLines().size() == 1 ? 0 : 1;

        String uptimeString = output.asLines().get(index).split("\\s+")[0];

        try {

            double uptime = NumberFormat.getNumberInstance().parse(uptimeString).doubleValue();

            if (uptime < someUptime) {

                Assert.fail(String.format(

                        "Test failure: Uptime was less than intended sleep time: %.3f s < %.3f s",

                        uptime, someUptime));

            }

        } catch (ParseException e) {

            Assert.fail("Test failure: Could not parse uptime string: " +

                    uptimeString, e);

        }

    }

    @Test

    public void jmx() {

        run(new JMXExecutor());

    }

}