1 /*
   2  * Copyright (c) 2014, 2016, 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 static org.testng.Assert.assertEquals;
  25 import static org.testng.Assert.assertFalse;
  26 import static org.testng.Assert.assertTrue;
  27 import static org.testng.Assert.fail;
  28 
  29 import java.io.IOException;
  30 import java.util.List;
  31 import java.util.Optional;
  32 import java.util.stream.Collectors;
  33 
  34 import org.testng.TestNG;
  35 import org.testng.annotations.Test;
  36 
  37 /*
  38  * @test
  39  * @modules java.base/jdk.internal.misc
  40  *          jdk.management
  41  * @run testng Basic
  42  * @summary Basic tests for ProcessHandler
  43  * @author Roger Riggs
  44  */
  45 public class Basic {
  46     /**
  47      * Tests of ProcessHandle.current.
  48      */
  49     @Test
  50     public static void test1() {
  51         try {
  52             ProcessHandle self = ProcessHandle.current();
  53             ProcessHandle self1 = ProcessHandle.current();
  54             assertEquals(self, self1); //, "get pid twice should be same %d: %d");
  55         } finally {
  56             // Cleanup any left over processes
  57             ProcessHandle.current().children().forEach(ProcessHandle::destroy);
  58         }
  59     }
  60 
  61     /**
  62      * Tests of ProcessHandle.get.
  63      */
  64     @Test
  65     public static void test2() {
  66         try {
  67             ProcessHandle self = ProcessHandle.current();
  68             long pid = self.getPid();       // known native process id
  69             Optional<ProcessHandle> self1 = ProcessHandle.of(pid);
  70             assertEquals(self1.get(), self,
  71                     "ProcessHandle.of(x.getPid()) should be equal getPid() %d: %d");
  72 
  73             Optional<ProcessHandle> ph = ProcessHandle.of(pid);
  74             assertEquals(pid, ph.get().getPid());
  75         } finally {
  76             // Cleanup any left over processes
  77             ProcessHandle.current().children().forEach(ProcessHandle::destroy);
  78         }
  79     }
  80 
  81     @Test
  82     public static void test3() {
  83         // Test can get parent of current
  84         ProcessHandle ph = ProcessHandle.current();
  85         try {
  86             Optional<ProcessHandle> pph = ph.parent();
  87             assertTrue(pph.isPresent(), "Current has a Parent");
  88         } finally {
  89             // Cleanup any left over processes
  90             ProcessHandle.current().children().forEach(ProcessHandle::destroy);
  91         }
  92     }
  93 
  94     @Test
  95     public static void test4() {
  96         try {
  97             Process p = new ProcessBuilder("sleep", "0").start();
  98             p.waitFor();
  99 
 100             long deadPid = p.getPid();
 101             p = null;               // Forget the process
 102 
 103             Optional<ProcessHandle> t = ProcessHandle.of(deadPid);
 104             assertFalse(t.isPresent(), "Handle created for invalid pid:" + t);
 105         } catch (IOException | InterruptedException ex) {
 106             fail("Unexpected exception", ex);
 107         } finally {
 108             // Cleanup any left over processes
 109             ProcessHandle.current().children().forEach(ProcessHandle::destroy);
 110         }
 111     }
 112 
 113     @Test
 114     public static void test5() {
 115         // Always contains itself.
 116         ProcessHandle current = ProcessHandle.current();
 117         List<ProcessHandle> list = ProcessHandle.allProcesses().collect(Collectors.toList());
 118         if (!list.stream()
 119                 .anyMatch(ph -> ph.equals(ProcessHandle.current()))) {
 120             System.out.printf("current: %s%n", current);
 121             System.out.printf("all processes.size: %d%n", list.size());
 122             list.forEach(p -> ProcessUtil.printProcess(p, "   allProcesses: "));
 123             fail("current process not found in all processes");
 124         }
 125     }
 126 
 127     @Test(expectedExceptions = IllegalStateException.class)
 128     public static void test6() {
 129         ProcessHandle.current().onExit();
 130     }
 131 
 132     @Test(expectedExceptions = IllegalStateException.class)
 133     public static void test7() {
 134         ProcessHandle.current().destroyForcibly();
 135     }
 136 
 137     // Main can be used to run the tests from the command line with only testng.jar.
 138     @SuppressWarnings("raw_types")
 139     public static void main(String[] args) {
 140         Class<?>[] testclass = {TreeTest.class};
 141         TestNG testng = new TestNG();
 142         testng.setTestClasses(testclass);
 143         testng.run();
 144     }
 145 
 146 }