8008379: TEST_BUG: Fail automatically with java.lang.NullPointerException.

Reviewed-by: serb, anthony

test/java/awt/Modal/ModalDialogMultiscreenTest/ModalDialogMultiscreenTest.java

+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+  @test
+  @bug 6430802 8008379
+  @summary WM should not hang after show()/close()
+  @author anthony.petrov@sun.com: area=awt.modal
+  @run main/manual ModalDialogMultiscreenTest
+*/
+
+
+/**
+ * ModalDialogMultiscreenTest.java
+ *
+ * summary: Tests whether a WM will hang on show()/close() a modal dialog in multiscreen mode
+ */
+
+import java.awt.*;
+import java.awt.event.*;
+import javax.swing.*;
+
+
+public class ModalDialogMultiscreenTest
+{
+
+    private static class ButtonActionListener implements ActionListener {
+        JFrame frame;
+        JDialog dialog;
+        public ButtonActionListener(JFrame frame, JDialog dialog) {
+            this.frame = frame;
+            this.dialog = dialog;
+        }
+        public void actionPerformed(ActionEvent e) {
+            dialog.setLocationRelativeTo(frame);
+            dialog.setVisible(true);
+        }
+    }
+    public static class TestDialog extends JDialog {
+        public TestDialog(Frame owner, String title, boolean modal, GraphicsConfiguration gc) {
+            super(owner, title, modal, gc);
+            setSize(200, 100);
+            JButton button = new JButton("Close");
+            button.addActionListener(new ActionListener() {
+                public void actionPerformed(ActionEvent e) {
+                    dispose();
+                }
+            });
+            getContentPane().add(button);
+        }
+    }
+
+    private static void init()
+    {
+        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
+        GraphicsDevice[] gs = ge.getScreenDevices();
+
+        Sysout.createDialog( );
+
+        if (gs.length < 2) {
+            System.out.println("Not multi-head environment, test not valid!");
+            ModalDialogMultiscreenTest.pass( );
+        }
+
+        String[] instructions =
+        {
+            "The test should be run on a multi-head X (non-xinerama) systems.",
+            "Otherwise click the Pass button right now.",
+            "You will see an open Frame on each screen your system has.",
+            "The frame has an 'Open dialog' button.",
+            "Clicking the button opens a modal dialog with a Close button.",
+            "The test procedure:",
+            "1. Open a dialog and close it with appropriate buttons.",
+            "2. Switch to another screen ($ DISPLAY=X.Y xprop)",
+            "3. Repeat steps 1-2 several times (about 3*<number-of-screens>)",
+            "If the test doesn't cause the window manager to hang, it's passed."
+        };
+        Sysout.printInstructions( instructions );
+
+
+        for (int i = 0; i < gs.length; i++) {
+            JFrame frame = new JFrame("Frame "+i,gs[i].getDefaultConfiguration());
+            JButton button = new JButton("Open Dialog");
+            button.setMinimumSize(new Dimension(200, 100));
+            button.setPreferredSize(new Dimension(200, 100));
+            button.setSize(new Dimension(200, 100));
+            button.addActionListener(new ButtonActionListener(frame, new TestDialog(frame, "Dialog #"+i, true, gs[i].getDefaultConfiguration())));
+            frame.getContentPane().add(button);
+            frame.pack();
+            frame.setVisible(true);
+        }
+
+    }//End  init()
+
+
+    //ap203012: NO MORE CHANGES BELOW THIS LINE
+
+
+
+    /*****************************************************
+     * Standard Test Machinery Section
+     * DO NOT modify anything in this section -- it's a
+     * standard chunk of code which has all of the
+     * synchronisation necessary for the test harness.
+     * By keeping it the same in all tests, it is easier
+     * to read and understand someone else's test, as
+     * well as insuring that all tests behave correctly
+     * with the test harness.
+     * There is a section following this for test-defined
+     * classes
+     ******************************************************/
+    private static boolean theTestPassed = false;
+    private static boolean testGeneratedInterrupt = false;
+    private static String failureMessage = "";
+
+    private static Thread mainThread = null;
+
+    private static int sleepTime = 300000;
+
+    public static void main( String args[] ) throws InterruptedException
+    {
+        mainThread = Thread.currentThread();
+        try
+        {
+            init();
+        }
+        catch( TestPassedException e )
+        {
+            //The test passed, so just return from main and harness will
+            // interepret this return as a pass
+            return;
+        }
+        //At this point, neither test passed nor test failed has been
+        // called -- either would have thrown an exception and ended the
+        // test, so we know we have multiple threads.
+
+        //Test involves other threads, so sleep and wait for them to
+        // called pass() or fail()
+        try
+        {
+            Thread.sleep( sleepTime );
+            //Timed out, so fail the test
+            throw new RuntimeException( "Timed out after " + sleepTime/1000 + " seconds" );
+        }
+        catch (InterruptedException e)
+        {
+            if( ! testGeneratedInterrupt ) throw e;
+
+            //reset flag in case hit this code more than once for some reason (just safety)
+            testGeneratedInterrupt = false;
+            if ( theTestPassed == false )
+            {
+                throw new RuntimeException( failureMessage );
+            }
+        }
+
+    }//main
+
+    public static synchronized void setTimeoutTo( int seconds )
+    {
+        sleepTime = seconds * 1000;
+    }
+
+    public static synchronized void pass()
+    {
+        Sysout.println( "The test passed." );
+        Sysout.println( "The test is over, hit  Ctl-C to stop Java VM" );
+        //first check if this is executing in main thread
+        if ( mainThread == Thread.currentThread() )
+        {
+            //Still in the main thread, so set the flag just for kicks,
+            // and throw a test passed exception which will be caught
+            // and end the test.
+            theTestPassed = true;
+            throw new TestPassedException();
+        }
+        //pass was called from a different thread, so set the flag and interrupt
+        // the main thead.
+        theTestPassed = true;
+        testGeneratedInterrupt = true;
+        mainThread.interrupt();
+    }//pass()
+
+    public static synchronized void fail()
+    {
+        //test writer didn't specify why test failed, so give generic
+        fail( "it just plain failed! :-)" );
+    }
+
+    public static synchronized void fail( String whyFailed )
+    {
+        Sysout.println( "The test failed: " + whyFailed );
+        Sysout.println( "The test is over, hit  Ctl-C to stop Java VM" );
+        //check if this called from main thread
+        if ( mainThread == Thread.currentThread() )
+        {
+            //If main thread, fail now 'cause not sleeping
+            throw new RuntimeException( whyFailed );
+        }
+        theTestPassed = false;
+        testGeneratedInterrupt = true;
+        failureMessage = whyFailed;
+        mainThread.interrupt();
+    }//fail()
+
+}// class ModalDialogMultiscreenTest
+
+//This exception is used to exit from any level of call nesting
+// when it's determined that the test has passed, and immediately
+// end the test.
+class TestPassedException extends RuntimeException
+{
+}
+
+//*********** End Standard Test Machinery Section **********
+
+
+//************ Begin classes defined for the test ****************
+
+// make listeners in a class defined here, and instantiate them in init()
+
+/* Example of a class which may be written as part of a test
+class NewClass implements anInterface
+ {
+   static int newVar = 0;
+
+   public void eventDispatched(AWTEvent e)
+    {
+      //Counting events to see if we get enough
+      eventCount++;
+
+      if( eventCount == 20 )
+       {
+         //got enough events, so pass
+
+         ModalDialogMultiscreenTest.pass();
+       }
+      else if( tries == 20 )
+       {
+         //tried too many times without getting enough events so fail
+
+         ModalDialogMultiscreenTest.fail();
+       }
+
+    }// eventDispatched()
+
+ }// NewClass class
+
+*/
+
+
+//************** End classes defined for the test *******************
+
+
+
+
+/****************************************************
+ Standard Test Machinery
+ DO NOT modify anything below -- it's a standard
+  chunk of code whose purpose is to make user
+  interaction uniform, and thereby make it simpler
+  to read and understand someone else's test.
+ ****************************************************/
+
+/**
+ This is part of the standard test machinery.
+ It creates a dialog (with the instructions), and is the interface
+  for sending text messages to the user.
+ To print the instructions, send an array of strings to Sysout.createDialog
+  WithInstructions method.  Put one line of instructions per array entry.
+ To display a message for the tester to see, simply call Sysout.println
+  with the string to be displayed.
+ This mimics System.out.println but works within the test harness as well
+  as standalone.
+ */
+
+class Sysout
+{
+    private static TestDialog dialog;
+
+    public static void createDialogWithInstructions( String[] instructions )
+    {
+        dialog = new TestDialog( new Frame(), "Instructions" );
+        dialog.printInstructions( instructions );
+        dialog.setVisible(true);
+        println( "Any messages for the tester will display here." );
+    }
+
+    public static void createDialog( )
+    {
+        dialog = new TestDialog( new Frame(), "Instructions" );
+        String[] defInstr = { "Instructions will appear here. ", "" } ;
+        dialog.printInstructions( defInstr );
+        dialog.setVisible(true);
+        println( "Any messages for the tester will display here." );
+    }
+
+
+    public static void printInstructions( String[] instructions )
+    {
+        dialog.printInstructions( instructions );
+    }
+
+
+    public static void println( String messageIn )
+    {
+        dialog.displayMessage( messageIn );
+    }
+
+}// Sysout  class
+
+/**
+  This is part of the standard test machinery.  It provides a place for the
+   test instructions to be displayed, and a place for interactive messages
+   to the user to be displayed.
+  To have the test instructions displayed, see Sysout.
+  To have a message to the user be displayed, see Sysout.
+  Do not call anything in this dialog directly.
+  */
+class TestDialog extends Dialog implements ActionListener
+{
+
+    TextArea instructionsText;
+    TextArea messageText;
+    int maxStringLength = 80;
+    Panel  buttonP = new Panel();
+    Button passB = new Button( "pass" );
+    Button failB = new Button( "fail" );
+
+    //DO NOT call this directly, go through Sysout
+    public TestDialog( Frame frame, String name )
+    {
+        super( frame, name );
+        int scrollBoth = TextArea.SCROLLBARS_BOTH;
+        instructionsText = new TextArea( "", 15, maxStringLength, scrollBoth );
+        add( "North", instructionsText );
+
+        messageText = new TextArea( "", 5, maxStringLength, scrollBoth );
+        add("Center", messageText);
+
+        passB = new Button( "pass" );
+        passB.setActionCommand( "pass" );
+        passB.addActionListener( this );
+        buttonP.add( "East", passB );
+
+        failB = new Button( "fail" );
+        failB.setActionCommand( "fail" );
+        failB.addActionListener( this );
+        buttonP.add( "West", failB );
+
+        add( "South", buttonP );
+        pack();
+
+        setVisible(true);
+    }// TestDialog()
+
+    //DO NOT call this directly, go through Sysout
+    public void printInstructions( String[] instructions )
+    {
+        //Clear out any current instructions
+        instructionsText.setText( "" );
+
+        //Go down array of instruction strings
+
+        String printStr, remainingStr;
+        for( int i=0; i < instructions.length; i++ )
+        {
+            //chop up each into pieces maxSringLength long
+            remainingStr = instructions[ i ];
+            while( remainingStr.length() > 0 )
+            {
+                //if longer than max then chop off first max chars to print
+                if( remainingStr.length() >= maxStringLength )
+                {
+                    //Try to chop on a word boundary
+                    int posOfSpace = remainingStr.
+                        lastIndexOf( ' ', maxStringLength - 1 );
+
+                    if( posOfSpace <= 0 ) posOfSpace = maxStringLength - 1;
+
+                    printStr = remainingStr.substring( 0, posOfSpace + 1 );
+                    remainingStr = remainingStr.substring( posOfSpace + 1 );
+                }
+                //else just print
+                else
+                {
+                    printStr = remainingStr;
+                    remainingStr = "";
+                }
+
+                instructionsText.append( printStr + "\n" );
+
+            }// while
+
+        }// for
+
+    }//printInstructions()
+
+    //DO NOT call this directly, go through Sysout
+    public void displayMessage( String messageIn )
+    {
+        messageText.append( messageIn + "\n" );
+        System.out.println(messageIn);
+    }
+
+    //catch presses of the passed and failed buttons.
+    //simply call the standard pass() or fail() static methods of
+    //ModalDialogMultiscreenTest
+    public void actionPerformed( ActionEvent e )
+    {
+        if( e.getActionCommand() == "pass" )
+        {
+            ModalDialogMultiscreenTest.pass();
+        }
+        else
+        {
+            ModalDialogMultiscreenTest.fail();
+        }
+    }
+
+}// TestDialog  class