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  * @library /test/lib/share/classes
  40  * @modules java.base/jdk.internal.misc
  41  *          jdk.management
  42  * @run testng Basic
  43  * @summary Basic tests for ProcessHandler
  44  * @author Roger Riggs
  45  */
  46 public class Basic {
  47     /**
  48      * Tests of ProcessHandle.current.
  49      */
  50     @Test
  51     public static void test1() {
  52         try {
  53             ProcessHandle self = ProcessHandle.current();
  54             ProcessHandle self1 = ProcessHandle.current();
  55             assertEquals(self, self1); //, "get pid twice should be same %d: %d");
  56         } finally {
  57             // Cleanup any left over processes
  58             ProcessHandle.current().children().forEach(ProcessHandle::destroy);
  59         }
  60     }
  61 
  62     /**
  63      * Tests of ProcessHandle.get.
  64      */
  65     @Test
  66     public static void test2() {
  67         try {
  68             ProcessHandle self = ProcessHandle.current();
  69             long pid = self.getPid();       // known native process id
  70             Optional<ProcessHandle> self1 = ProcessHandle.of(pid);
  71             assertEquals(self1.get(), self,
  72                     "ProcessHandle.of(x.getPid()) should be equal getPid() %d: %d");
  73 
  74             Optional<ProcessHandle> ph = ProcessHandle.of(pid);
  75             assertEquals(pid, ph.get().getPid());
  76         } finally {
  77             // Cleanup any left over processes
  78             ProcessHandle.current().children().forEach(ProcessHandle::destroy);
  79         }
  80     }
  81 
  82     @Test
  83     public static void test3() {
  84         // Test can get parent of current
  85         ProcessHandle ph = ProcessHandle.current();
  86         try {
  87             Optional<ProcessHandle> pph = ph.parent();
  88             assertTrue(pph.isPresent(), "Current has a Parent");
  89         } finally {
  90             // Cleanup any left over processes
  91             ProcessHandle.current().children().forEach(ProcessHandle::destroy);
  92         }
  93     }
  94 
  95     @Test
  96     public static void test4() {
  97         try {
  98             Process p = new ProcessBuilder("sleep", "0").start();
  99             p.waitFor();
 100 
 101             long deadPid = p.getPid();
 102             p = null;               // Forget the process
 103 
 104             Optional<ProcessHandle> t = ProcessHandle.of(deadPid);
 105             assertFalse(t.isPresent(), "Handle created for invalid pid:" + t);
 106         } catch (IOException | InterruptedException ex) {
 107             fail("Unexpected exception", ex);
 108         } finally {
 109             // Cleanup any left over processes
 110             ProcessHandle.current().children().forEach(ProcessHandle::destroy);
 111         }
 112     }
 113 
 114     @Test
 115     public static void test5() {
 116         // Always contains itself.
 117         ProcessHandle current = ProcessHandle.current();
 118         List<ProcessHandle> list = ProcessHandle.allProcesses().collect(Collectors.toList());
 119         if (!list.stream()
 120                 .anyMatch(ph -> ph.equals(ProcessHandle.current()))) {
 121             System.out.printf("current: %s%n", current);
 122             System.out.printf("all processes.size: %d%n", list.size());
 123             list.forEach(p -> ProcessUtil.printProcess(p, "   allProcesses: "));
 124             fail("current process not found in all processes");
 125         }
 126     }
 127 
 128     @Test(expectedExceptions = IllegalStateException.class)
 129     public static void test6() {
 130         ProcessHandle.current().onExit();
 131     }
 132 
 133     @Test(expectedExceptions = IllegalStateException.class)
 134     public static void test7() {
 135         ProcessHandle.current().destroyForcibly();
 136     }
 137 
 138     // Main can be used to run the tests from the command line with only testng.jar.
 139     @SuppressWarnings("raw_types")
 140     public static void main(String[] args) {
 141         Class<?>[] testclass = {TreeTest.class};
 142         TestNG testng = new TestNG();
 143         testng.setTestClasses(testclass);
 144         testng.run();
 145     }
 146 
 147 }