8296632: Write a test to verify the content change of TextArea sends TextEvent

Backport-of: 59a308b9d0546471566b11f62ef9bdc169ca0b95

Author: Victor Rudometov

test/jdk/java/awt/event/ComponentEvent/TextAreaTextEventTest.java

@@ -0,0 +1,141 @@
+/*
+ * Copyright (c) 2007, 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.Dimension;
+import java.awt.EventQueue;
+import java.awt.FlowLayout;
+import java.awt.Frame;
+import java.awt.Point;
+import java.awt.Robot;
+import java.awt.TextArea;
+import java.awt.event.InputEvent;
+import java.awt.event.KeyEvent;
+
+/*
+ * @test
+ * @key headful
+ * @bug 8296632
+ * @summary Verify the content changes of a TextArea via TextListener.
+ * @run main TextAreaTextEventTest
+ */
+public class TextAreaTextEventTest {
+
+    private static Frame frame;
+    private volatile static TextArea textArea;
+    private volatile static boolean textChanged = false;
+    private volatile static Point textAreaAt;
+    private volatile static Dimension textAreaSize;
+    private static Robot robot = null;
+
+    public static void main(String[] args) throws Exception {
+        try {
+            EventQueue.invokeAndWait(TextAreaTextEventTest::initializeGUI);
+
+            robot = new Robot();
+            robot.setAutoDelay(100);
+
+            robot.waitForIdle();
+            EventQueue.invokeAndWait(() -> {
+                textAreaAt = textArea.getLocationOnScreen();
+                textAreaSize = textArea.getSize();
+            });
+            robot.mouseMove(textAreaAt.x + textAreaSize.width / 2,
+                textAreaAt.y + textAreaSize.height / 2);
+            robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
+            robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
+            typeKey(KeyEvent.VK_T);
+
+            robot.waitForIdle();
+            if (!textChanged) {
+                throw new RuntimeException(
+                    "FAIL: TextEvent not triggered when key 'T' typed on TextArea");
+            }
+
+            typeKey(KeyEvent.VK_E);
+            typeKey(KeyEvent.VK_S);
+            typeKey(KeyEvent.VK_T);
+
+            textChanged = false;
+            typeKey(KeyEvent.VK_ENTER);
+
+            robot.waitForIdle();
+            if (!textChanged) {
+                throw new RuntimeException(
+                    "FAIL: TextEvent not triggered when Enter pressed on TextArea");
+            }
+
+            textChanged = false;
+            robot.mouseMove(textAreaAt.x + 4, textAreaAt.y + 10);
+            robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
+            robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
+            robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
+            for (int i = 0; i < textAreaSize.width / 2; i++) {
+                robot.mouseMove(textAreaAt.x + 4 + i, textAreaAt.y + 10);
+            }
+            robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
+
+            robot.waitForIdle();
+            if (textChanged) {
+                throw new RuntimeException(
+                    "FAIL: TextEvent triggered when text is selected on TextArea!");
+            }
+
+            textChanged = false;
+            typeKey(KeyEvent.VK_F3);
+
+            robot.waitForIdle();
+            if (textChanged) {
+                throw new RuntimeException(
+                    "FAIL: TextEvent triggered when special key F3 is pressed on TextArea!");
+            }
+            System.out.println("Test passed!");
+        } finally {
+            EventQueue.invokeAndWait(TextAreaTextEventTest::disposeFrame);
+        }
+    }
+
+    private static void initializeGUI() {
+        frame = new Frame("Test Frame");
+        frame.setLayout(new FlowLayout());
+        textArea = new TextArea(5, 15);
+        textArea.addTextListener((event) -> {
+            System.out.println("Got a text event: " + event);
+            textChanged = true;
+        });
+        frame.add(textArea);
+        frame.pack();
+        frame.setLocationRelativeTo(null);
+        frame.setVisible(true);
+    }
+
+    public static void disposeFrame() {
+        if (frame != null) {
+            frame.dispose();
+        }
+    }
+
+    private static void typeKey(int key) throws Exception {
+        robot.keyPress(key);
+        robot.keyRelease(key);
+    }
+}