hadoop.example.hdfs.ShowFileStatusTestCase.java Source code

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Here is the source code for hadoop.example.hdfs.ShowFileStatusTestCase.java

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/*
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package hadoop.example.hdfs;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.OutputStream;

import junit.framework.Assert;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;

/**
 * @author <a href="mailto:haithanh0809@gmail.com">Nguyen Thanh Hai</a>
 * @version $Id$
 *
 */
public class ShowFileStatusTestCase {
    private static MiniDFSCluster cluster; // use an in-process HDFS cluster for testing
    private static FileSystem fs;

    @BeforeClass
    public static void setUp() throws IOException {
        Configuration conf = new Configuration();
        if (System.getProperty("test.build.data") == null) {
            System.setProperty("test.build.data", "/tmp");
            cluster = new MiniDFSCluster(conf, 1, true, null);
            fs = cluster.getFileSystem();
            OutputStream out = fs.create(new Path("/dir/file"));
            out.write("content".getBytes("UTF-8"));
            out.close();
        }
    }

    @AfterClass
    public static void tearDown() throws IOException {
        if (fs != null)
            fs.close();
        if (cluster != null)
            cluster.shutdown();
    }

    @Test(expected = FileNotFoundException.class)
    public void throwsFileNotFoundForNonExistentFile() throws IOException {
        fs.getFileStatus(new Path("no-such-file"));
    }

    @Test
    public void fileStatusForFile() throws IOException {
        Path file = new Path("/dir/file");
        FileStatus stat = fs.getFileStatus(file);
        Assert.assertEquals("/dir/file", stat.getPath().toUri().getPath());
        Assert.assertFalse(stat.isDir());
        Assert.assertEquals(stat.getLen(), 7L);
        Assert.assertEquals(stat.getReplication(), 1);
        Assert.assertEquals(stat.getBlockSize(), 64 * 1024 * 1024L);
        Assert.assertEquals(stat.getOwner(), "haint");
        Assert.assertEquals(stat.getGroup(), "supergroup");
        Assert.assertEquals(stat.getPermission().toString(), "rw-r--r--");
    }

    @Test
    public void fileStatusForDirectory() throws IOException {
        Path dir = new Path("/dir");
        FileStatus stat = fs.getFileStatus(dir);
        Assert.assertTrue(stat.isDir());
        Assert.assertEquals(stat.getLen(), 0L);
        Assert.assertEquals(stat.getReplication(), 0L);
        Assert.assertEquals(stat.getBlockSize(), 0L);
        Assert.assertEquals(stat.getOwner(), "haint");
        Assert.assertEquals(stat.getGroup(), "supergroup");
        Assert.assertEquals(stat.getPermission().toString(), "rwxr-xr-x");
    }
}