1 /*
   2  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 import org.testng.annotations.Test;
  25 import org.testng.Assert;
  26 
  27 import jdk.test.lib.OutputAnalyzer;
  28 import jdk.test.lib.dcmd.CommandExecutor;
  29 import jdk.test.lib.dcmd.JMXExecutor;
  30 
  31 import java.text.NumberFormat;
  32 import java.text.ParseException;
  33 
  34 /*
  35  * @test
  36  * @summary Test of diagnostic command VM.uptime
  37  * @library /testlibrary
  38  * @modules java.base/jdk.internal.misc
  39  *          java.compiler
  40  *          java.management
  41  *          jdk.jvmstat/sun.jvmstat.monitor
  42  * @build jdk.test.lib.*
  43  * @build jdk.test.lib.dcmd.*
  44  * @run testng UptimeTest
  45  */
  46 public class UptimeTest {
  47     public void run(CommandExecutor executor) {
  48         double someUptime = 1.0;
  49         long startTime = System.currentTimeMillis();
  50         try {
  51             synchronized (this) {
  52                 /* Loop to guard against spurious wake ups */
  53                 while (System.currentTimeMillis() < (startTime + someUptime * 1000)) {
  54                     wait((int) someUptime * 1000);
  55                 }
  56             }
  57         } catch (InterruptedException e) {
  58             Assert.fail("Test error: Exception caught when sleeping:", e);
  59         }
  60 
  61         OutputAnalyzer output = executor.execute("VM.uptime");
  62 
  63         output.stderrShouldBeEmpty();
  64 
  65         /*
  66          * Output should be:
  67          * [pid]:
  68          * xx.yyy s
  69          *
  70          * If there is only one line in output there is no "[pid]:" printout;
  71          * skip first line, split on whitespace and grab first half
  72          */
  73         int index = output.asLines().size() == 1 ? 0 : 1;
  74         String uptimeString = output.asLines().get(index).split("\\s+")[0];
  75 
  76         try {
  77             double uptime = NumberFormat.getNumberInstance().parse(uptimeString).doubleValue();
  78             if (uptime < someUptime) {
  79                 Assert.fail(String.format(
  80                         "Test failure: Uptime was less than intended sleep time: %.3f s < %.3f s",
  81                         uptime, someUptime));
  82             }
  83         } catch (ParseException e) {
  84             Assert.fail("Test failure: Could not parse uptime string: " +
  85                     uptimeString, e);
  86         }
  87     }
  88 
  89     @Test
  90     public void jmx() {
  91         run(new JMXExecutor());
  92     }
  93 }