test/jdk/java/awt/Robot/InfiniteLoopException.java - master - githubmirror/jdk11u-dev

test/jdk/java/awt/Robot/InfiniteLoopException.java

68 строк2 KB

Zhengyu Gu

8268620: InfiniteLoopException test may fail on x86 platforms

14 июл 2021, 15:23

14 июл 2021, 15:23c9a8220

/*
 * Copyright (c) 2020, 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.
 */

import java.awt.Frame;
import java.awt.Robot;
import java.util.concurrent.TimeUnit;

/**
 * @test
 * @key headful
 * @bug 8196100
 * @summary Checks that Robot.waitForIdle() works if EDT is overloaded
 */
public final class InfiniteLoopException {

    public static void main(String[] args) throws Exception {
        Frame frame = new Frame();
        try {
            frame.setSize(300, 300);
            frame.setLocationRelativeTo(null);
            frame.setVisible(true);
            test(frame);
            frame.setVisible(false);
        } finally {
            frame.dispose();
        }
    }

    private static void test(Frame frame) throws Exception {
        Runnable repaint = () -> {
            while (frame.isDisplayable()) {
                frame.repaint();
                Thread.yield();
            }
        };
        new Thread(repaint).start();
        new Thread(repaint).start();
        new Thread(repaint).start();

        Robot robot = new Robot();
        long start = System.nanoTime();
        robot.waitForIdle();
        long time = TimeUnit.NANOSECONDS.toSeconds(System.nanoTime() - start);
        if (time > 20) {
            throw new RuntimeException("Too slow:" + time);
        }
    }
}