OpenNUL.java

/*
 * Copyright (c) 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
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 * questions.
 */

/*
 * @test
 * @bug 8285445
 * @requires (os.family == "windows")
 * @summary Verify behavior of opening "NUL:" with ADS enabled and disabled.
 * @run main/othervm OpenNUL
 * @run main/othervm -Djdk.io.File.enableADS OpenNUL
 * @run main/othervm -Djdk.io.File.enableADS=FalsE OpenNUL
 * @run main/othervm -Djdk.io.File.enableADS=true OpenNUL
 */

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class OpenNUL {
    public static void main(String args[]) throws IOException {
        String enableADS = System.getProperty("jdk.io.File.enableADS", "true");
        boolean fails = enableADS.equalsIgnoreCase(Boolean.FALSE.toString());

        FileOutputStream fos;
        try {
            fos = new FileOutputStream("NUL:");
            if (fails)
                throw new RuntimeException("Should have failed");
        } catch (FileNotFoundException fnfe) {
            if (!fails)
                throw new RuntimeException("Should not have failed");
        }
    }
}