/*

 * 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.

 *

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 */

/* @test

   @bug 4028605 4109069 4234207 4401122

   @summary Make sure ZipInputStream/InflaterInputStream.available() will

            return 0 after EOF has reached and 1 otherwise.

   */

import java.io.*;

import java.util.zip.*;

public class Available {

    public static void main(String[] args) throws Exception {

        // 4028605 4109069 4234207

        test1();

        // test 4401122

        test2();

    }

    private static void test1() throws Exception {

        File f = new File(System.getProperty("test.src", "."), "input.jar");

        // test ZipInputStream

        try (FileInputStream fis = new FileInputStream(f);

             ZipInputStream z = new ZipInputStream(fis))

        {

            z.getNextEntry();

            tryAvail(z);

        }

        // test InflaterInputStream

        try (ZipFile zfile = new ZipFile(f)) {

            tryAvail(zfile.getInputStream(zfile.getEntry("Available.java")));

        }

    }

    static void tryAvail(InputStream in) throws Exception {

        byte[] buf = new byte[1024];

        int n;

        while ((n = in.read(buf)) != -1);

        if (in.available() != 0) {

            throw new Exception("available should return 0 after EOF");

        }

    }

    // To reproduce 4401122

    private static void test2() throws Exception {

        File f = new File(System.getProperty("test.src", "."), "input.jar");

        try (ZipFile zf = new ZipFile(f)) {

            InputStream in = zf.getInputStream(zf.getEntry("Available.java"));

            int initialAvailable = in.available();

            in.read();

            if (in.available() != initialAvailable - 1)

                throw new RuntimeException("Available not decremented.");

            for(int j=0; j<initialAvailable-1; j++)

                in.read();

            if (in.available() != 0)

                throw new RuntimeException();

            in.close();

            if (in.available() != 0)

                throw new RuntimeException();

        }

    }

}