/*
 * Copyright (c) 2017, 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.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.IOException;

/*
 * @test
 * @bug 4358774
 * @summary Check for expected behavior of InputStream.nullStream().
 */
public class NullInputStream {
    public static void main(String[] args) throws IOException {
        int failures = 0;

        InputStream in = InputStream.nullStream();
        if (in == null) {
            throw new RuntimeException
                ("InputStream.nullStream() returned null");
        }

        if (in.available() != 0) {
            System.err.println("available() != 0");
            failures++;
        }

        if (in.read() != -1) {
            System.err.println("read() != -1");
            failures++;
        }

        if (in.read(new byte[1]) != -1) {
            System.err.println("read(byte[]) != -1");
            failures++;
        }

        if (in.read(new byte[1], 0, 1) != -1) {
            System.err.println("read(byte[],int,int) != -1");
            failures++;
        }

        if (in.readAllBytes().length != 0) {
            System.err.println("readAllBytes().length != 0");
            failures++;
        }

        if (in.readNBytes(new byte[1], 0, 1) != 0) {
            System.err.println("readNBytes(byte[],int,int) != -1");
            failures++;
        }

        if (in.transferTo(new ByteArrayOutputStream(7)) != 0) {
            System.err.println("transferTo() != 0");
            failures++;
        }

        if (in.skip(1) != 0) {
            System.err.println("skip() != 0");
            failures++;
        }

        in.close();
        try {
            in.available();
            System.err.println("No IOException from available() after closing");
            failures++;
        } catch (IOException e) {
        }
        try {
            in.read();
            System.err.println("No IOException from read() after closing");
            failures++;
        } catch (IOException e) {
        }
        try {
            in.read(new byte[1], 0, 1);
            System.err.println("No IOException from read(b,i,i) after closing");
            failures++;
        } catch (IOException e) {
        }
        try {
            in.readAllBytes();
            System.err.println("No IOException from readAllBytes() after closing");
            failures++;
        } catch (IOException e) {
        }
        try {
            in.readNBytes(new byte[1], 0, 1);
            System.err.println("No IOException from readNBytes() after closing");
            failures++;
        } catch (IOException e) {
        }
        try {
            in.skip(1);
            System.err.println("No IOException from skip() after closing");
            failures++;
        } catch (IOException e) {
        }
        try {
            in.transferTo(new ByteArrayOutputStream(7));
            System.err.println("No IOException from transferTo() after closing");
            failures++;
        } catch (IOException e) {
        }

        if (failures != 0) {
            throw new RuntimeException("Test failed");
        }
    }
}