1 /*
   2  * Copyright (c) 2017, 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 /*
  25  * @test
  26  * @bug 8176490
  27  * @summary Tests that there is no hang or deadlock when the visibility
  28  *      of parent and child windows is changed.
  29  * @library ../../regtesthelpers
  30  * @build Util
  31  * @run main/timeout=20 WindowDeadlockTest
  32  */
  33 
  34 import java.awt.Dialog;
  35 import java.awt.Frame;
  36 import java.awt.Robot;
  37 
  38 import test.java.awt.regtesthelpers.Util;
  39 
  40 public class WindowDeadlockTest {
  41     public static void main(String[] args) throws Exception {
  42         Robot robot = Util.createRobot();
  43 
  44         Frame main = new Frame("Main");
  45         main.setBounds(0, 0, 200, 100);
  46         main.setVisible(true);
  47 
  48         Dialog first = new Dialog(main, "First");
  49         first.setBounds(250, 0, 200, 100);
  50         first.setVisible(true);
  51 
  52         Dialog second = new Dialog(first, "Second");
  53         second.setBounds(0, 150, 200, 100);
  54         second.setVisible(true);
  55 
  56         Util.waitForIdle(robot);
  57         robot.delay(2000);
  58 
  59         Dialog third = new Dialog(first, "Third", false);
  60         third.setBounds(250, 150, 200, 100);
  61         third.setVisible(true);
  62         first.setVisible(false); // the hang takes place here
  63 
  64         Util.waitForIdle(robot);
  65         robot.delay(2000);
  66 
  67         third.dispose();
  68         second.dispose();
  69         first.dispose();
  70         main.dispose();
  71     }
  72 }