src/test/java/org/apache/commons/compress/archivers/CpioTestCase.java

/*
 * 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
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 */
package org.apache.commons.compress.archivers;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;

import org.apache.commons.compress.AbstractTestCase;
import org.apache.commons.compress.archivers.cpio.CpioArchiveEntry;
import org.apache.commons.compress.utils.IOUtils;

public final class CpioTestCase extends AbstractTestCase {

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

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

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

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

        os.close();
        out.close();
    }

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

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

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

            os.close();
            out.close();
        }

        // Unarchive Operation
        final File input = output;
        final InputStream is = new FileInputStream(input);
        final ArchiveInputStream in = new ArchiveStreamFactory().createArchiveInputStream("cpio", is);


        Map result = new HashMap();
        ArchiveEntry entry = null;
        while ((entry = in.getNextEntry()) != null) {
            File target = new File(dir, entry.getName());
            final OutputStream out = new FileOutputStream(target);
            IOUtils.copy(in, out);
            out.close();
            result.put(entry.getName(), target);
        }
        in.close();
        is.close();

        int lineSepLength = System.getProperty("line.separator").length();

        File t = (File)result.get("test1.xml");
        assertTrue("Expected " + t.getAbsolutePath() + " to exist", t.exists());
        assertEquals("length of " + t.getAbsolutePath(),
                     72 + 4 * lineSepLength, t.length());

        t = (File)result.get("test2.xml");
        assertTrue("Expected " + t.getAbsolutePath() + " to exist", t.exists());
        assertEquals("length of " + t.getAbsolutePath(),
                     73 + 5 * lineSepLength, t.length());
    }

}