test/jdk/java/awt/print/RemotePrinterStatusRefresh/RemotePrinterStatusRefresh.java - platform/libcore - Git at Google

 /*
  * Copyright (c) 2018, 2021, 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 8153732 8212202 8221263 8221412 8222108 8263311
  * @requires (os.family == "Windows")
  * @summary Windows remote printer changes do not reflect in lookupPrintServices()
  * @run main/manual RemotePrinterStatusRefresh
  */

 import java.awt.BorderLayout;
 import java.awt.Color;
 import java.awt.Component;
 import java.awt.GridLayout;
 import java.awt.event.ActionEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 import java.util.concurrent.CountDownLatch;
 import javax.print.PrintService;
 import javax.print.PrintServiceLookup;
 import javax.swing.AbstractListModel;
 import javax.swing.BorderFactory;
 import javax.swing.Box;
 import javax.swing.BoxLayout;
 import javax.swing.DefaultListCellRenderer;
 import javax.swing.GroupLayout;
 import javax.swing.JButton;
 import javax.swing.JFrame;
 import javax.swing.JLabel;
 import javax.swing.JList;
 import javax.swing.JPanel;
 import javax.swing.JScrollPane;
 import javax.swing.JTextArea;
 import javax.swing.JTextField;
 import javax.swing.SwingUtilities;
 import javax.swing.Timer;

 import static javax.swing.BorderFactory.createTitledBorder;

 public class RemotePrinterStatusRefresh extends WindowAdapter {

     private static final long TIMEOUT = 15L * 60;


     private static final CountDownLatch latch = new CountDownLatch(1);
     private static volatile RemotePrinterStatusRefresh test;

     private volatile boolean testResult;
     private volatile boolean testTimedOut;

     private final JFrame frame;

     private JButton refreshButton;
     private JButton passButton;
     private JButton failButton;

     private final ServiceItemListModel beforeList;
     private final ServiceItemListModel afterList;

     private JTextField timeLeft;

     private final Timer timer;
     private final long startTime;


     private static class ServiceItem {
         private enum State {
             REMOVED, UNCHANGED, ADDED
         }

         final String name;
         State state;

         private ServiceItem(final String name) {
             this.name = name;
             state = State.UNCHANGED;
         }

         @Override
         public String toString() {
             return name;
         }

         @Override
         public boolean equals(Object obj) {
             return (obj instanceof ServiceItem)
                     && ((ServiceItem) obj).name.equals(name);
         }

         @Override
         public int hashCode() {
             return name.hashCode();
         }
     }

     private static class ServiceItemListModel extends AbstractListModel<ServiceItem> {
         private final List<ServiceItem> list;

         private ServiceItemListModel(List<ServiceItem> list) {
             this.list = list;
         }

         @Override
         public int getSize() {
             return list.size();
         }

         @Override
         public ServiceItem getElementAt(int index) {
             return list.get(index);
         }

         private void refreshList(List<ServiceItem> newList) {
             list.clear();
             list.addAll(newList);
             fireChanged();
         }

         private void fireChanged() {
             fireContentsChanged(this, 0, list.size() - 1);
         }
     }

     private static class ServiceItemListRenderer extends DefaultListCellRenderer {
         @Override
         public Component getListCellRendererComponent(JList<?> list,
                                                       Object value,
                                                       int index,
                                                       boolean isSelected,
                                                       boolean cellHasFocus) {
             Component component =
                     super.getListCellRendererComponent(list, value, index,
                                                        isSelected, cellHasFocus);
             switch (((ServiceItem) value).state) {
                 case REMOVED:
                     component.setBackground(Color.RED);
                     component.setForeground(Color.WHITE);
                     break;
                 case ADDED:
                     component.setBackground(Color.GREEN);
                     component.setForeground(Color.BLACK);
                     break;
                 case UNCHANGED:
                 default:
                     break;
             }
             return component;
         }
     }

     private static final String INSTRUCTIONS_TEXT =
             "Please follow the steps for this manual test:\n"
                     + "Step 0: \"Before\" list is populated with currently "
                     +          "configured printers.\n"
                     + "Step 1: Add or Remove a network printer using "
                     +          "Windows Control Panel.\n"
                     + "Step 2: Click Refresh."
                     +          "\"After\" list is populated with updated list "
                     +          "of printers.\n"
                     + "Step 3: Compare the list of printers in \"Before\" and "
                     +          "\"After\" lists.\n"
                     + "              Added printers are highlighted with "
                     +               "green color, removed ones \u2014 with "
                     +               "red color.\n"
                     + "Step 4: Click Pass if the list of printers is correctly "
                     +          "updated.\n"
                     + "Step 5: If the list is not updated, click Refresh again.\n"
                     + "Step 6: If the list does not update, click Fail.\n"
                     + "\n"
                     + "You have to click Refresh to enable Pass and Fail buttons. "
                     + "If no button is pressed,\n"
                     + "the test will time out. "
                     + "Closing the window also fails the test.";

     public static void main(String[] args) throws Exception {
         SwingUtilities.invokeAndWait(RemotePrinterStatusRefresh::createUI);

         latch.await();
         if (!test.testResult) {
             throw new RuntimeException("Test failed"
                 + (test.testTimedOut ? " because of time out" : ""));
         }
     }

     private static void createUI() {
         test = new RemotePrinterStatusRefresh();
     }

     private RemotePrinterStatusRefresh() {
         frame = new JFrame("RemotePrinterStatusRefresh");
         frame.addWindowListener(this);


         JPanel northPanel = new JPanel(new BorderLayout());
         northPanel.add(createInfoPanel(), BorderLayout.NORTH);
         northPanel.add(createInstructionsPanel(), BorderLayout.SOUTH);


         beforeList = new ServiceItemListModel(
                 Collections.unmodifiableList(collectPrinterList()));
         afterList = new ServiceItemListModel(new ArrayList<>());
         logList("Before:", beforeList.list);

         JPanel listPanel = new JPanel(new GridLayout(1, 2));
         listPanel.setBorder(createTitledBorder("Print Services"));
         listPanel.add(createListPanel(beforeList, "Before:", 'b'));
         listPanel.add(createListPanel(afterList, "After:", 'a'));


         JPanel mainPanel = new JPanel(new BorderLayout());
         mainPanel.add(northPanel, BorderLayout.NORTH);
         mainPanel.add(listPanel, BorderLayout.CENTER);
         mainPanel.add(createButtonPanel(), BorderLayout.SOUTH);


         frame.add(mainPanel);
         frame.pack();
         refreshButton.requestFocusInWindow();
         frame.setVisible(true);


         timer = new Timer(1000, this::updateTimeLeft);
         timer.start();
         startTime = System.currentTimeMillis();
         updateTimeLeft(null);
     }

     private JPanel createInfoPanel() {
         JLabel javaLabel = new JLabel("Java version:");
         JTextField javaVersion =
                 new JTextField(System.getProperty("java.runtime.version"));
         javaVersion.setEditable(false);
         javaLabel.setLabelFor(javaVersion);

         JLabel timeoutLabel = new JLabel("Time left:");
         timeLeft = new JTextField();
         timeLeft.setEditable(false);
         timeoutLabel.setLabelFor(timeLeft);

         JPanel infoPanel = new JPanel();
         GroupLayout layout = new GroupLayout(infoPanel);
         infoPanel.setLayout(layout);
         infoPanel.setBorder(BorderFactory.createTitledBorder("Info"));
         layout.setAutoCreateGaps(true);
         layout.setHorizontalGroup(
             layout.createSequentialGroup()
                 .addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING)
                     .addComponent(javaLabel)
                     .addComponent(timeoutLabel)
                 )
                 .addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING, true)
                     .addComponent(javaVersion)
                     .addComponent(timeLeft)
                 )
         );
         layout.setVerticalGroup(
             layout.createSequentialGroup()
                 .addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
                     .addComponent(javaLabel)
                     .addComponent(javaVersion)
                 )
                 .addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
                     .addComponent(timeoutLabel)
                     .addComponent(timeLeft))
         );
         return infoPanel;
     }

     private JPanel createInstructionsPanel() {
         JPanel instructionsPanel = new JPanel(new BorderLayout());
         JTextArea instructionText = new JTextArea(INSTRUCTIONS_TEXT);
         instructionText.setEditable(false);
         instructionsPanel.setBorder(createTitledBorder("Test Instructions"));
         instructionsPanel.add(new JScrollPane(instructionText));
         return  instructionsPanel;
     }

     private JPanel createListPanel(final ServiceItemListModel model,
                                    final String title,
                                    final char mnemonic) {
         JPanel panel = new JPanel();
         panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
         JList<ServiceItem> list = new JList<>(model);
         list.setCellRenderer(new ServiceItemListRenderer());

         JLabel label = new JLabel(title);
         label.setLabelFor(list);
         label.setDisplayedMnemonic(mnemonic);
         JPanel labelPanel = new JPanel();
         labelPanel.setLayout(new BoxLayout(labelPanel, BoxLayout.X_AXIS));
         labelPanel.add(label, BorderLayout.EAST);
         labelPanel.add(Box.createHorizontalGlue());

         panel.add(labelPanel);
         panel.add(new JScrollPane(list));
         return panel;
     }

     private JPanel createButtonPanel() {
         refreshButton = new JButton("Refresh");
         refreshButton.addActionListener(this::refresh);

         passButton = new JButton("Pass");
         passButton.addActionListener(this::pass);
         passButton.setEnabled(false);

         failButton = new JButton("Fail");
         failButton.addActionListener(this::fail);
         failButton.setEnabled(false);

         JPanel buttonPanel = new JPanel();
         buttonPanel.setLayout(new BoxLayout(buttonPanel, BoxLayout.X_AXIS));
         buttonPanel.add(Box.createHorizontalGlue());
         buttonPanel.add(refreshButton);
         buttonPanel.add(passButton);
         buttonPanel.add(failButton);
         buttonPanel.add(Box.createHorizontalGlue());
         return buttonPanel;
     }

     private static List<ServiceItem> collectPrinterList() {
         PrintService[] printServices = PrintServiceLookup.lookupPrintServices(null, null);
         List<ServiceItem> list = new ArrayList<>(printServices.length);
         for (PrintService service : printServices) {
             list.add(new ServiceItem(service.getName()));
         }
         return list;
     }

     private static void logList(final String title, final List<ServiceItem> list) {
         System.out.println(title);
         for (ServiceItem item : list) {
             System.out.println(item.name);
         }
         System.out.println();
     }

     private static void compareLists(final ServiceItemListModel before, final ServiceItemListModel after) {
         boolean beforeUpdated = false;
         boolean afterUpdated = false;

         for (ServiceItem item : before.list) {
             if (!after.list.contains(item)) {
                 item.state = ServiceItem.State.REMOVED;
                 beforeUpdated = true;
             } else if (item.state != ServiceItem.State.UNCHANGED) {
                 item.state = ServiceItem.State.UNCHANGED;
                 beforeUpdated = true;
             }
         }

         for (ServiceItem item : after.list) {
             if (!before.list.contains(item)) {
                 item.state = ServiceItem.State.ADDED;
                 afterUpdated = true;
             } else if (item.state != ServiceItem.State.UNCHANGED) {
                 item.state = ServiceItem.State.UNCHANGED;
                 afterUpdated = true;
             }
         }

         if (beforeUpdated) {
             before.fireChanged();
         }
         if (afterUpdated) {
             after.fireChanged();
         }
     }

     @Override
     public void windowClosing(WindowEvent e) {
         System.out.println("The window closed");
         disposeUI();
     }

     private void disposeUI() {
         timer.stop();
         latch.countDown();
         frame.dispose();
     }

     @SuppressWarnings("unused")
     private void refresh(ActionEvent e) {
         System.out.println("Refresh button pressed");
         afterList.refreshList(collectPrinterList());
         compareLists(beforeList, afterList);
         passButton.setEnabled(true);
         failButton.setEnabled(true);
         logList("After:", afterList.list);
     }

     @SuppressWarnings("unused")
     private void pass(ActionEvent e) {
         System.out.println("Pass button pressed");
         testResult = true;
         disposeUI();
     }

     @SuppressWarnings("unused")
     private void fail(ActionEvent e) {
         System.out.println("Fail button pressed");
         testResult = false;
         disposeUI();
     }

     @SuppressWarnings("unused")
     private void updateTimeLeft(ActionEvent e) {
         long elapsed = (System.currentTimeMillis() - startTime) / 1000;
         long left = TIMEOUT - elapsed;
         if (left < 0) {
             testTimedOut = true;
             disposeUI();
         }
         timeLeft.setText(formatTime(left));
     }

     private static String formatTime(final long seconds) {
         long minutes = seconds / 60;
         return String.format("%d:%02d", minutes, seconds - minutes * 60);
     }

 }
	/*
	* Copyright (c) 2018, 2021, 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 8153732 8212202 8221263 8221412 8222108 8263311
	* @requires (os.family == "Windows")
	* @summary Windows remote printer changes do not reflect in lookupPrintServices()
	* @run main/manual RemotePrinterStatusRefresh
	*/

	import java.awt.BorderLayout;
	import java.awt.Color;
	import java.awt.Component;
	import java.awt.GridLayout;
	import java.awt.event.ActionEvent;
	import java.awt.event.WindowAdapter;
	import java.awt.event.WindowEvent;
	import java.util.ArrayList;
	import java.util.Collections;
	import java.util.List;
	import java.util.concurrent.CountDownLatch;
	import javax.print.PrintService;
	import javax.print.PrintServiceLookup;
	import javax.swing.AbstractListModel;
	import javax.swing.BorderFactory;
	import javax.swing.Box;
	import javax.swing.BoxLayout;
	import javax.swing.DefaultListCellRenderer;
	import javax.swing.GroupLayout;
	import javax.swing.JButton;
	import javax.swing.JFrame;
	import javax.swing.JLabel;
	import javax.swing.JList;
	import javax.swing.JPanel;
	import javax.swing.JScrollPane;
	import javax.swing.JTextArea;
	import javax.swing.JTextField;
	import javax.swing.SwingUtilities;
	import javax.swing.Timer;

	import static javax.swing.BorderFactory.createTitledBorder;

	public class RemotePrinterStatusRefresh extends WindowAdapter {

	private static final long TIMEOUT = 15L * 60;


	private static final CountDownLatch latch = new CountDownLatch(1);
	private static volatile RemotePrinterStatusRefresh test;

	private volatile boolean testResult;
	private volatile boolean testTimedOut;

	private final JFrame frame;

	private JButton refreshButton;
	private JButton passButton;
	private JButton failButton;

	private final ServiceItemListModel beforeList;
	private final ServiceItemListModel afterList;

	private JTextField timeLeft;

	private final Timer timer;
	private final long startTime;


	private static class ServiceItem {
	private enum State {
	REMOVED, UNCHANGED, ADDED
	}

	final String name;
	State state;

	private ServiceItem(final String name) {
	this.name = name;
	state = State.UNCHANGED;
	}

	@Override
	public String toString() {
	return name;
	}

	@Override
	public boolean equals(Object obj) {
	return (obj instanceof ServiceItem)
	&& ((ServiceItem) obj).name.equals(name);
	}

	@Override
	public int hashCode() {
	return name.hashCode();
	}
	}

	private static class ServiceItemListModel extends AbstractListModel<ServiceItem> {
	private final List<ServiceItem> list;

	private ServiceItemListModel(List<ServiceItem> list) {
	this.list = list;
	}

	@Override
	public int getSize() {
	return list.size();
	}

	@Override
	public ServiceItem getElementAt(int index) {
	return list.get(index);
	}

	private void refreshList(List<ServiceItem> newList) {
	list.clear();
	list.addAll(newList);
	fireChanged();
	}

	private void fireChanged() {
	fireContentsChanged(this, 0, list.size() - 1);
	}
	}

	private static class ServiceItemListRenderer extends DefaultListCellRenderer {
	@Override
	public Component getListCellRendererComponent(JList<?> list,
	Object value,
	int index,
	boolean isSelected,
	boolean cellHasFocus) {
	Component component =
	super.getListCellRendererComponent(list, value, index,
	isSelected, cellHasFocus);
	switch (((ServiceItem) value).state) {
	case REMOVED:
	component.setBackground(Color.RED);
	component.setForeground(Color.WHITE);
	break;
	case ADDED:
	component.setBackground(Color.GREEN);
	component.setForeground(Color.BLACK);
	break;
	case UNCHANGED:
	default:
	break;
	}
	return component;
	}
	}

	private static final String INSTRUCTIONS_TEXT =
	"Please follow the steps for this manual test:\n"
	+ "Step 0: \"Before\" list is populated with currently "
	+ "configured printers.\n"
	+ "Step 1: Add or Remove a network printer using "
	+ "Windows Control Panel.\n"
	+ "Step 2: Click Refresh."
	+ "\"After\" list is populated with updated list "
	+ "of printers.\n"
	+ "Step 3: Compare the list of printers in \"Before\" and "
	+ "\"After\" lists.\n"
	+ " Added printers are highlighted with "
	+ "green color, removed ones \u2014 with "
	+ "red color.\n"
	+ "Step 4: Click Pass if the list of printers is correctly "
	+ "updated.\n"
	+ "Step 5: If the list is not updated, click Refresh again.\n"
	+ "Step 6: If the list does not update, click Fail.\n"
	+ "\n"
	+ "You have to click Refresh to enable Pass and Fail buttons. "
	+ "If no button is pressed,\n"
	+ "the test will time out. "
	+ "Closing the window also fails the test.";

	public static void main(String[] args) throws Exception {
	SwingUtilities.invokeAndWait(RemotePrinterStatusRefresh::createUI);

	latch.await();
	if (!test.testResult) {
	throw new RuntimeException("Test failed"
	+ (test.testTimedOut ? " because of time out" : ""));
	}
	}

	private static void createUI() {
	test = new RemotePrinterStatusRefresh();
	}

	private RemotePrinterStatusRefresh() {
	frame = new JFrame("RemotePrinterStatusRefresh");
	frame.addWindowListener(this);


	JPanel northPanel = new JPanel(new BorderLayout());
	northPanel.add(createInfoPanel(), BorderLayout.NORTH);
	northPanel.add(createInstructionsPanel(), BorderLayout.SOUTH);


	beforeList = new ServiceItemListModel(
	Collections.unmodifiableList(collectPrinterList()));
	afterList = new ServiceItemListModel(new ArrayList<>());
	logList("Before:", beforeList.list);

	JPanel listPanel = new JPanel(new GridLayout(1, 2));
	listPanel.setBorder(createTitledBorder("Print Services"));
	listPanel.add(createListPanel(beforeList, "Before:", 'b'));
	listPanel.add(createListPanel(afterList, "After:", 'a'));


	JPanel mainPanel = new JPanel(new BorderLayout());
	mainPanel.add(northPanel, BorderLayout.NORTH);
	mainPanel.add(listPanel, BorderLayout.CENTER);
	mainPanel.add(createButtonPanel(), BorderLayout.SOUTH);


	frame.add(mainPanel);
	frame.pack();
	refreshButton.requestFocusInWindow();
	frame.setVisible(true);


	timer = new Timer(1000, this::updateTimeLeft);
	timer.start();
	startTime = System.currentTimeMillis();
	updateTimeLeft(null);
	}

	private JPanel createInfoPanel() {
	JLabel javaLabel = new JLabel("Java version:");
	JTextField javaVersion =
	new JTextField(System.getProperty("java.runtime.version"));
	javaVersion.setEditable(false);
	javaLabel.setLabelFor(javaVersion);

	JLabel timeoutLabel = new JLabel("Time left:");
	timeLeft = new JTextField();
	timeLeft.setEditable(false);
	timeoutLabel.setLabelFor(timeLeft);

	JPanel infoPanel = new JPanel();
	GroupLayout layout = new GroupLayout(infoPanel);
	infoPanel.setLayout(layout);
	infoPanel.setBorder(BorderFactory.createTitledBorder("Info"));
	layout.setAutoCreateGaps(true);
	layout.setHorizontalGroup(
	layout.createSequentialGroup()
	.addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING)
	.addComponent(javaLabel)
	.addComponent(timeoutLabel)
	)
	.addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING, true)
	.addComponent(javaVersion)
	.addComponent(timeLeft)
	)
	);
	layout.setVerticalGroup(
	layout.createSequentialGroup()
	.addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
	.addComponent(javaLabel)
	.addComponent(javaVersion)
	)
	.addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
	.addComponent(timeoutLabel)
	.addComponent(timeLeft))
	);
	return infoPanel;
	}

	private JPanel createInstructionsPanel() {
	JPanel instructionsPanel = new JPanel(new BorderLayout());
	JTextArea instructionText = new JTextArea(INSTRUCTIONS_TEXT);
	instructionText.setEditable(false);
	instructionsPanel.setBorder(createTitledBorder("Test Instructions"));
	instructionsPanel.add(new JScrollPane(instructionText));
	return instructionsPanel;
	}

	private JPanel createListPanel(final ServiceItemListModel model,
	final String title,
	final char mnemonic) {
	JPanel panel = new JPanel();
	panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
	JList<ServiceItem> list = new JList<>(model);
	list.setCellRenderer(new ServiceItemListRenderer());

	JLabel label = new JLabel(title);
	label.setLabelFor(list);
	label.setDisplayedMnemonic(mnemonic);
	JPanel labelPanel = new JPanel();
	labelPanel.setLayout(new BoxLayout(labelPanel, BoxLayout.X_AXIS));
	labelPanel.add(label, BorderLayout.EAST);
	labelPanel.add(Box.createHorizontalGlue());

	panel.add(labelPanel);
	panel.add(new JScrollPane(list));
	return panel;
	}

	private JPanel createButtonPanel() {
	refreshButton = new JButton("Refresh");
	refreshButton.addActionListener(this::refresh);

	passButton = new JButton("Pass");
	passButton.addActionListener(this::pass);
	passButton.setEnabled(false);

	failButton = new JButton("Fail");
	failButton.addActionListener(this::fail);
	failButton.setEnabled(false);

	JPanel buttonPanel = new JPanel();
	buttonPanel.setLayout(new BoxLayout(buttonPanel, BoxLayout.X_AXIS));
	buttonPanel.add(Box.createHorizontalGlue());
	buttonPanel.add(refreshButton);
	buttonPanel.add(passButton);
	buttonPanel.add(failButton);
	buttonPanel.add(Box.createHorizontalGlue());
	return buttonPanel;
	}

	private static List<ServiceItem> collectPrinterList() {
	PrintService[] printServices = PrintServiceLookup.lookupPrintServices(null, null);
	List<ServiceItem> list = new ArrayList<>(printServices.length);
	for (PrintService service : printServices) {
	list.add(new ServiceItem(service.getName()));
	}
	return list;
	}

	private static void logList(final String title, final List<ServiceItem> list) {
	System.out.println(title);
	for (ServiceItem item : list) {
	System.out.println(item.name);
	}
	System.out.println();
	}

	private static void compareLists(final ServiceItemListModel before, final ServiceItemListModel after) {
	boolean beforeUpdated = false;
	boolean afterUpdated = false;

	for (ServiceItem item : before.list) {
	if (!after.list.contains(item)) {
	item.state = ServiceItem.State.REMOVED;
	beforeUpdated = true;
	} else if (item.state != ServiceItem.State.UNCHANGED) {
	item.state = ServiceItem.State.UNCHANGED;
	beforeUpdated = true;
	}
	}

	for (ServiceItem item : after.list) {
	if (!before.list.contains(item)) {
	item.state = ServiceItem.State.ADDED;
	afterUpdated = true;
	} else if (item.state != ServiceItem.State.UNCHANGED) {
	item.state = ServiceItem.State.UNCHANGED;
	afterUpdated = true;
	}
	}

	if (beforeUpdated) {
	before.fireChanged();
	}
	if (afterUpdated) {
	after.fireChanged();
	}
	}

	@Override
	public void windowClosing(WindowEvent e) {
	System.out.println("The window closed");
	disposeUI();
	}

	private void disposeUI() {
	timer.stop();
	latch.countDown();
	frame.dispose();
	}

	@SuppressWarnings("unused")
	private void refresh(ActionEvent e) {
	System.out.println("Refresh button pressed");
	afterList.refreshList(collectPrinterList());
	compareLists(beforeList, afterList);
	passButton.setEnabled(true);
	failButton.setEnabled(true);
	logList("After:", afterList.list);
	}

	@SuppressWarnings("unused")
	private void pass(ActionEvent e) {
	System.out.println("Pass button pressed");
	testResult = true;
	disposeUI();
	}

	@SuppressWarnings("unused")
	private void fail(ActionEvent e) {
	System.out.println("Fail button pressed");
	testResult = false;
	disposeUI();
	}

	@SuppressWarnings("unused")
	private void updateTimeLeft(ActionEvent e) {
	long elapsed = (System.currentTimeMillis() - startTime) / 1000;
	long left = TIMEOUT - elapsed;
	if (left < 0) {
	testTimedOut = true;
	disposeUI();
	}
	timeLeft.setText(formatTime(left));
	}

	private static String formatTime(final long seconds) {
	long minutes = seconds / 60;
	return String.format("%d:%02d", minutes, seconds - minutes * 60);
	}

	}