8283507: Create a regression test for RFE 4287690

Reviewed-by: serb, aivanov

Author: Manukumar V S

test/jdk/javax/swing/JComboBox/JComboBoxPopupMenuEventTest.java

@@ -0,0 +1,200 @@
+/*
+ * Copyright (c) 2001, 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.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.JComboBox;
+import javax.swing.JComponent;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+import javax.swing.JTextField;
+import javax.swing.SwingUtilities;
+import javax.swing.UIManager;
+import javax.swing.UIManager.LookAndFeelInfo;
+import javax.swing.UnsupportedLookAndFeelException;
+import javax.swing.event.PopupMenuEvent;
+import javax.swing.event.PopupMenuListener;
+
+import static javax.swing.UIManager.getInstalledLookAndFeels;
+
+/*
+ * @test
+ * @key headful
+ * @bug 4287690 4331058
+ * @summary This testcase tests RFE-4287690 and RFE-4331058 requests,
+ *          JComboBox should send drop down visible as well as invisible events.
+ * @run main JComboBoxPopupMenuEventTest
+ */
+public class JComboBoxPopupMenuEventTest {
+
+    private static final String[] compStrs =
+            {"Apple", "Citibank", "Cisco", "Cienna", "Oracle", "IBM"};
+    private static Robot robot;
+    private static JComboBox comboBox;
+    private static JTextField searchTextField;
+    private static CountDownLatch popupMenuVisibleLatch;
+    private static CountDownLatch popupMenuInvisibleLatch;
+    private static JFrame frame;
+
+    public static void main(String[] args) throws Exception {
+        robot = new Robot();
+        robot.setAutoWaitForIdle(true);
+        robot.setAutoDelay(200);
+        List<String> lafs = Arrays.stream(getInstalledLookAndFeels())
+                                  .map(LookAndFeelInfo::getClassName)
+                                  .collect(Collectors.toList());
+        for (final String laf : lafs) {
+            try {
+                popupMenuVisibleLatch = new CountDownLatch(1);
+                popupMenuInvisibleLatch = new CountDownLatch(1);
+                AtomicBoolean lafSetSuccess = new AtomicBoolean(false);
+                SwingUtilities.invokeAndWait(() -> {
+                    lafSetSuccess.set(setLookAndFeel(laf));
+                    if (lafSetSuccess.get()) {
+                        createUI();
+                    }
+                });
+                if (!lafSetSuccess.get()) {
+                    continue;
+                }
+                robot.waitForIdle();
+
+                mouseClick(searchTextField);
+                hitKeys(KeyEvent.VK_C, KeyEvent.VK_I);
+                mouseClick(comboBox);
+
+                // Verifying whether popupMenuWillBecomeVisible method of
+                // PopupMenuListener gets called when popup menu appears.
+                if (!popupMenuVisibleLatch.await(3, TimeUnit.SECONDS)) {
+                    throw new RuntimeException(
+                            "Waited too long, but popupMenuWillBecomeVisible " +
+                            "not yet got called for " + laf);
+                }
+
+                hitKeys(KeyEvent.VK_ENTER);
+
+                // Verifying whether popupMenuWillBecomeInvisible method of
+                // PopupMenuListener gets called when popup menu disappears.
+                if (!popupMenuInvisibleLatch.await(3, TimeUnit.SECONDS)) {
+                    throw new RuntimeException(
+                            "Waited too long, but popupMenuWillBecomeInvisible " +
+                            "not yet got called for " + laf);
+                }
+
+                System.out.println("Test passed for " + laf);
+            } finally {
+                SwingUtilities.invokeAndWait(
+                        JComboBoxPopupMenuEventTest::disposeFrame);
+            }
+        }
+    }
+
+    private static void mouseClick(JComponent jComponent) throws Exception {
+        final Point location = getLocationOnScreen(jComponent);
+        robot.mouseMove(location.x + 8, location.y + 8);
+        robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
+        robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
+    }
+
+    private static Point getLocationOnScreen(JComponent jComponent)
+            throws Exception {
+        final AtomicReference<Point> loc = new AtomicReference<>();
+        SwingUtilities.invokeAndWait(
+                () -> loc.set(jComponent.getLocationOnScreen()));
+        return loc.get();
+    }
+
+    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]);
+        }
+    }
+
+    public static void createUI() {
+        frame = new JFrame();
+        JPanel panel = new JPanel();
+        searchTextField = new JTextField(6);
+        panel.add(searchTextField);
+        comboBox = new JComboBox(compStrs);
+        panel.add(comboBox);
+        comboBox.addPopupMenuListener(new PopupMenuListener() {
+            public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
+                System.out.println("popupMenuWillBecomeVisible() got called");
+                popupMenuVisibleLatch.countDown();
+                comboBox.removeAllItems();
+                String text = searchTextField.getText().trim();
+                Arrays.stream(compStrs)
+                      .filter(str -> str.toLowerCase().startsWith(text))
+                      .forEach(str -> comboBox.addItem(str));
+            }
+
+            public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
+                System.out.println("popupMenuWillBecomeInvisible() got called");
+                popupMenuInvisibleLatch.countDown();
+            }
+
+            public void popupMenuCanceled(PopupMenuEvent e) {
+            }
+        });
+
+        frame.setContentPane(panel);
+        frame.setSize(250, 100);
+        frame.setLocationRelativeTo(null);
+        frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
+        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;
+        }
+    }
+
+}