1 /*
   2  * Copyright (c) 2018, 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 java.awt.Button;
  25 import java.awt.Frame;
  26 import java.util.concurrent.TimeUnit;
  27 
  28 import sun.awt.SunToolkit;
  29 
  30 /**
  31  * @test
  32  * @key headful
  33  * @bug 8211435
  34  * @requires (os.family == "mac")
  35  * @modules java.desktop/sun.awt
  36  */
  37 public final class NullActiveWindowOnFocusLost {
  38 
  39     private static volatile long endtime;
  40     private static Throwable failed;
  41 
  42     public static void main(final String[] args) throws Exception {
  43         // Will run the test no more than 30 seconds
  44         endtime = System.nanoTime() + TimeUnit.SECONDS.toNanos(30);
  45         Thread.setDefaultUncaughtExceptionHandler((t, e) -> failed = e);
  46 
  47         final Thread[] threads = new Thread[20];
  48         for (int i = 0; i < threads.length; i++) {
  49             threads[i] = testThread(i);
  50         }
  51         for (final Thread thread : threads) {
  52             thread.start();
  53         }
  54         for (final Thread thread : threads) {
  55             thread.join();
  56         }
  57         if (failed != null) {
  58             failed.printStackTrace();
  59             throw new RuntimeException(failed);
  60         }
  61     }
  62 
  63     private static Thread testThread(int index) {
  64         return new Thread(new ThreadGroup("TG " + index), () -> {
  65             SunToolkit.createNewAppContext();
  66             while (!isComplete()) {
  67                 final Frame frame = new Frame();
  68                 frame.setSize(300, 300);
  69                 frame.add(new Button("Button"));
  70                 frame.setLocationRelativeTo(null);
  71                 frame.setVisible(true);
  72                 try {
  73                     Thread.sleep(index); // increase probability of the failure
  74                 } catch (InterruptedException ignored) {
  75                 }
  76                 frame.dispose();
  77             }
  78         });
  79     }
  80 
  81     private static boolean isComplete() {
  82         return endtime - System.nanoTime() < 0 || failed != null;
  83     }
  84 }