/**
* 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.hadoop.hdfs;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileChecksum;
import org.apache.hadoop.fs.Path;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
public class TestGetFileChecksum {
private static final int BLOCKSIZE = 1024;
private static final short REPLICATION = 3;
private Configuration conf;
private MiniDFSCluster cluster;
private DistributedFileSystem dfs;
@Before
public void setUp() throws Exception {
conf = new Configuration();
conf.setLong(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, BLOCKSIZE);
cluster = new MiniDFSCluster.Builder(conf).numDataNodes(REPLICATION)
.build();
cluster.waitActive();
dfs = cluster.getFileSystem();
}
@After
public void tearDown() throws Exception {
if (cluster != null) {
cluster.shutdown();
}
}
public void testGetFileChecksum(final Path foo, final int appendLength)
throws Exception {
final int appendRounds = 16;
FileChecksum[] fc = new FileChecksum[appendRounds + 1];
DFSTestUtil.createFile(dfs, foo, appendLength, REPLICATION, 0L);
fc[0] = dfs.getFileChecksum(foo);
for (int i = 0; i < appendRounds; i++) {
DFSTestUtil.appendFile(dfs, foo, appendLength);
fc[i + 1] = dfs.getFileChecksum(foo);
}
for (int i = 0; i < appendRounds + 1; i++) {
FileChecksum checksum = dfs.getFileChecksum(foo, appendLength * (i+1));
Assert.assertTrue(checksum.equals(fc[i]));
}
}
@Test
public void testGetFileChecksum() throws Exception {
testGetFileChecksum(new Path("/foo"), BLOCKSIZE / 4);
testGetFileChecksum(new Path("/bar"), BLOCKSIZE / 4 - 1);
}
}