/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.commons.compress.archivers;

import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.commons.compress.AbstractTestCase;
import org.apache.commons.compress.archivers.ar.ArArchiveEntry;
import org.apache.commons.compress.utils.IOUtils;

public final class ArTestCase extends AbstractTestCase {

    public void testArArchiveCreation() throws Exception {
        final File output = new File(dir, "bla.ar");

        final File file1 = getFile("test1.xml");
        final File file2 = getFile("test2.xml");

        final OutputStream out = new FileOutputStream(output);
        final ArchiveOutputStream os = new ArchiveStreamFactory().createArchiveOutputStream("ar", out);
        os.putArchiveEntry(new ArArchiveEntry("test1.xml", file1.length()));
        IOUtils.copy(new FileInputStream(file1), os);
        os.closeArchiveEntry();

        os.putArchiveEntry(new ArArchiveEntry("test2.xml", file2.length()));
        IOUtils.copy(new FileInputStream(file2), os);
        os.closeArchiveEntry();

        os.close();
    }

    public void testArUnarchive() throws Exception {
        final File output = new File(dir, "bla.ar");
        {
            final File file1 = getFile("test1.xml");
            final File file2 = getFile("test2.xml");

            final OutputStream out = new FileOutputStream(output);
            final ArchiveOutputStream os = new ArchiveStreamFactory().createArchiveOutputStream("ar", out);
            os.putArchiveEntry(new ArArchiveEntry("test1.xml", file1.length()));
            IOUtils.copy(new FileInputStream(file1), os);
            os.closeArchiveEntry();

            os.putArchiveEntry(new ArArchiveEntry("test2.xml", file2.length()));
            IOUtils.copy(new FileInputStream(file2), os);
            os.closeArchiveEntry();
            os.close();
            out.close();
        }

        // UnArArchive Operation
        final File input = output;
        final InputStream is = new FileInputStream(input);
        final ArchiveInputStream in = new ArchiveStreamFactory().createArchiveInputStream(new BufferedInputStream(is));
        final ArArchiveEntry entry = (ArArchiveEntry)in.getNextEntry();

        File target = new File(dir, entry.getName());
        final OutputStream out = new FileOutputStream(target);

        IOUtils.copy(in, out);

        out.close();
        in.close();
        is.close();
    }

    public void testArDelete() throws Exception {
        final File output = new File(dir, "bla.ar");

        final File file1 = getFile("test1.xml");
        final File file2 = getFile("test2.xml");
        {
            // create

            final OutputStream out = new FileOutputStream(output);
            final ArchiveOutputStream os = new ArchiveStreamFactory().createArchiveOutputStream("ar", out);
            os.putArchiveEntry(new ArArchiveEntry("test1.xml", file1.length()));
            IOUtils.copy(new FileInputStream(file1), os);
            os.closeArchiveEntry();

            os.putArchiveEntry(new ArArchiveEntry("test2.xml", file2.length()));
            IOUtils.copy(new FileInputStream(file2), os);
            os.closeArchiveEntry();
            os.close();
            out.close();
        }

        assertEquals(8
                     + 60 + file1.length() + (file1.length() % 2)
                     + 60 + file2.length() + (file2.length() % 2),
                     output.length());

        final File output2 = new File(dir, "bla2.ar");

        int copied = 0;
        int deleted = 0;

        {
            // remove all but one file

            final InputStream is = new FileInputStream(output);
            final OutputStream os = new FileOutputStream(output2);
            final ArchiveOutputStream aos = new ArchiveStreamFactory().createArchiveOutputStream("ar", os);
            final ArchiveInputStream ais = new ArchiveStreamFactory().createArchiveInputStream(new BufferedInputStream(is));
            while(true) {
                final ArArchiveEntry entry = (ArArchiveEntry)ais.getNextEntry();
                if (entry == null) {
                    break;
                }

                if ("test1.xml".equals(entry.getName())) {
                    aos.putArchiveEntry(entry);
                    IOUtils.copy(ais, aos);
                    aos.closeArchiveEntry();
                    copied++;
                } else {
                    IOUtils.copy(ais, new ByteArrayOutputStream());
                    deleted++;
                }

            }
            ais.close();
            aos.close();
            is.close();
            os.close();
        }

        assertEquals(1, copied);
        assertEquals(1, deleted);
        assertEquals(144, output2.length());

        long files = 0;
        long sum = 0;

        {
            final InputStream is = new FileInputStream(output2);
            final ArchiveInputStream ais = new ArchiveStreamFactory().createArchiveInputStream(new BufferedInputStream(is));
            while(true) {
                final ArArchiveEntry entry = (ArArchiveEntry)ais.getNextEntry();
                if (entry == null) {
                    break;
                }

                IOUtils.copy(ais, new ByteArrayOutputStream());

                sum +=  entry.getLength();
                files++;
            }
            ais.close();
            is.close();
        }

        assertEquals(1, files);
        assertEquals(76, sum);

    }

}

@@ -5683,12 +5683,97 @@
 als(
-144,
+8%0A                     + 60 + file1.length() + (file1.length() %25 2),%0A                    
  out
@@ -6490,10 +6490,22 @@
 als(
-76
+file1.length()
 , su

make test platform independent