8282789: Create a regression test for the JTree usecase of JDK-4618767

Backport-of: 83a1c90433343107eaa2a7fa41b9b07f86b6ce19

Author: GoeLin

test/jdk/javax/swing/JTree/4618767/JTreeSelectedElementTest.java

@@ -0,0 +1,226 @@
+/*
+ * Copyright (c) 2002, 2022, 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.
+ */
+
+import java.awt.Point;
+import java.awt.Rectangle;
+import java.awt.Robot;
+import java.awt.event.InputEvent;
+import java.awt.event.KeyEvent;
+import java.util.Arrays;
+import java.util.List;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicReference;
+import java.util.stream.Collectors;
+import javax.swing.JFrame;
+import javax.swing.JMenu;
+import javax.swing.JMenuBar;
+import javax.swing.JMenuItem;
+import javax.swing.JTree;
+import javax.swing.SwingUtilities;
+import javax.swing.UIManager;
+import javax.swing.UIManager.LookAndFeelInfo;
+import javax.swing.UnsupportedLookAndFeelException;
+import javax.swing.event.MenuEvent;
+import javax.swing.event.MenuListener;
+
+import static javax.swing.UIManager.getInstalledLookAndFeels;
+
+/*
+ * @test
+ * @key headful
+ * @bug 4618767
+ * @summary This test confirms that typing a letter while a JTree has focus now makes the selection
+ *          not jump to the item whose text starts with that letter if that typed letter is accompanied
+ *          by modifier keys such as ALT or CTRL(eg: ALT+F).
+ * @run main JTreeSelectedElementTest
+ */
+public class JTreeSelectedElementTest {
+
+    private static final int FILE_MENU = KeyEvent.VK_F;
+    private static JFrame frame;
+    private static JTree tree;
+    private static Robot robot;
+    private static CountDownLatch menuSelectedEventLatch;
+
+    public static void main(String[] args) throws Exception {
+        robot = new Robot();
+        robot.setAutoWaitForIdle(true);
+        robot.setAutoDelay(200);
+
+        final boolean isMac = System.getProperty("os.name")
+                                    .toLowerCase()
+                                    .contains("os x");
+
+        List<String> lafs = Arrays.stream(getInstalledLookAndFeels())
+                                  .map(LookAndFeelInfo::getClassName)
+                                  .collect(Collectors.toList());
+        for (final String laf : lafs) {
+            menuSelectedEventLatch = new CountDownLatch(1);
+            try {
+                AtomicBoolean lafSetSuccess = new AtomicBoolean(false);
+                SwingUtilities.invokeAndWait(() -> {
+                    lafSetSuccess.set(setLookAndFeel(laf));
+                    if (lafSetSuccess.get()) {
+                        createUI();
+                    }
+                });
+                if (!lafSetSuccess.get()) {
+                    continue;
+                }
+                robot.waitForIdle();
+
+                // Select the node named as 'colors'
+                Point pt = getNodeLocation(1);
+                robot.mouseMove(pt.x, pt.y);
+                robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
+                robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
+
+                // Assertion check to verify that the selected node is 'colors'
+                final String elementSelBefore = getCurrentNodeName();
+                if (!"colors".equals(elementSelBefore)) {
+                    throw new RuntimeException("Test failed for " + laf
+                            + " as the tree node selected: " + elementSelBefore
+                            + " is not the expected one 'colors'"
+                    );
+                }
+
+                // Now operate Menu using Mnemonics, different key combinations for different OSes.
+                // For most OSes it's ALT+F; on macOS it's ALT+CNTRL+F except for Nimbus LaF.
+                if (isMac && !laf.contains("Nimbus")) {
+                    hitKeys(KeyEvent.VK_ALT, KeyEvent.VK_CONTROL, FILE_MENU);
+                } else {
+                    hitKeys(KeyEvent.VK_ALT, FILE_MENU);
+                }
+
+                // Wait until the menu got selected.
+                if (!menuSelectedEventLatch.await(3, TimeUnit.SECONDS)) {
+                    throw new RuntimeException("Waited too long, but can't select menu using mnemonics for " + laf);
+                }
+
+                hitKeys(KeyEvent.VK_ENTER);
+
+                String elementSelAfter = getCurrentNodeName();
+
+                // As per the fix of BugID 4618767, the tree element selection should not change
+                if (!elementSelBefore.equals(elementSelAfter)) {
+                    throw new RuntimeException("Test failed for " + laf
+                            + " as tree.getLastSelectedPathComponent() before: " + elementSelBefore
+                            + " not same as tree.getLastSelectedPathComponent() after pressing Enter: "
+                            + elementSelAfter
+                    );
+                }
+
+                System.out.println("Test passed for laf: " + laf);
+
+            } finally {
+                SwingUtilities.invokeAndWait(JTreeSelectedElementTest::disposeFrame);
+            }
+        }
+    }
+
+    private static void hitKeys(int... keys) {
+        for (int key : keys) {
+            robot.keyPress(key);
+        }
+
+        for (int i = keys.length - 1; i >= 0; i--) {
+            robot.keyRelease(keys[i]);
+        }
+    }
+
+    private static String getCurrentNodeName() throws Exception {
+        AtomicReference<String> nodeName = new AtomicReference<>();
+        SwingUtilities.invokeAndWait(() -> {
+            nodeName.set(tree.getLastSelectedPathComponent().toString().trim());
+        });
+        return nodeName.get();
+    }
+
+    private static Point getNodeLocation(int rowCount) throws Exception {
+        AtomicReference<Point> treeNodeLoc = new AtomicReference<>();
+        SwingUtilities.invokeAndWait(() -> {
+            final Point locationOnScreen = tree.getLocationOnScreen();
+            Rectangle rt = tree.getPathBounds(tree.getPathForRow(rowCount));
+            locationOnScreen.translate(rt.x + rt.width / 2, rt.y + rt.height / 2);
+            treeNodeLoc.set(locationOnScreen);
+        });
+        return treeNodeLoc.get();
+    }
+
+    private static void createUI() {
+        frame = new JFrame();
+        tree = new JTree();
+        JMenu menu = new JMenu("File");
+        menu.setMnemonic(FILE_MENU);
+        JMenuItem menuItem = new JMenuItem("Dummy");
+        menu.add(menuItem);
+        menu.addMenuListener(new MenuListener() {
+            @Override
+            public void menuSelected(MenuEvent e) {
+                menuSelectedEventLatch.countDown();
+            }
+
+            @Override
+            public void menuDeselected(MenuEvent e) {
+            }
+
+            @Override
+            public void menuCanceled(MenuEvent e) {
+            }
+        });
+
+        JMenuBar menuBar = new JMenuBar();
+        menuBar.add(menu);
+
+        frame.setJMenuBar(menuBar);
+        frame.setContentPane(tree);
+        frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
+        frame.pack();
+        frame.setAlwaysOnTop(true);
+        frame.setLocationRelativeTo(null);
+        frame.setVisible(true);
+    }
+
+    private static boolean setLookAndFeel(String lafName) {
+        try {
+            UIManager.setLookAndFeel(lafName);
+        } catch (UnsupportedLookAndFeelException ignored) {
+            System.out.println("Ignoring Unsupported L&F: " + lafName);
+            return false;
+        } catch (ClassNotFoundException | InstantiationException
+                | IllegalAccessException e) {
+            throw new RuntimeException(e);
+        }
+        return true;
+    }
+
+    private static void disposeFrame() {
+        if (frame != null) {
+            frame.dispose();
+            frame = null;
+        }
+    }
+
+}