HDFS-4875. Add a test for testing snapshot file length. Contributed by Arpit Agarwal.
git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1493850 13f79535-47bb-0310-9956-ffa450edef68
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@ -1089,6 +1089,9 @@ Release 2.1.0-beta - UNRELEASED
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HDFS-4902. DFSClient.getSnapshotDiffReport should use string path rather
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than o.a.h.fs.Path. (Binglin Chang via jing9)
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HDFS-4875. Add a test for testing snapshot file length.
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(Arpit Agarwal via jing9)
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Release 2.0.5-alpha - 06/06/2013
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INCOMPATIBLE CHANGES
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@ -0,0 +1,115 @@
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/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.hadoop.hdfs.server.namenode.snapshot;
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import java.util.Random;
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import org.apache.hadoop.fs.FileStatus;
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import org.junit.After;
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import org.junit.Before;
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import org.junit.Test;
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import static org.hamcrest.CoreMatchers.is;
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import static org.junit.Assert.assertThat;
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import static org.junit.Assert.assertTrue;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.fs.FSDataInputStream;
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import org.apache.hadoop.fs.Path;
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import org.apache.hadoop.hdfs.DFSTestUtil;
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import org.apache.hadoop.hdfs.DistributedFileSystem;
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import org.apache.hadoop.hdfs.MiniDFSCluster;
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public class TestSnapshotFileLength {
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private static final long SEED = 0;
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private static final short REPLICATION = 1;
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private static final int BLOCKSIZE = 1024;
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private static Configuration conf = new Configuration();
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private static MiniDFSCluster cluster;
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private static DistributedFileSystem hdfs;
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private final Path dir = new Path("/TestSnapshotFileLength");
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private final Path sub = new Path(dir, "sub1");
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private final String file1Name = "file1";
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private final String snapshot1 = "snapshot1";
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@Before
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public void setUp() throws Exception {
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cluster = new MiniDFSCluster.Builder(conf).numDataNodes(REPLICATION)
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.build();
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cluster.waitActive();
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hdfs = cluster.getFileSystem();
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}
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@After
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public void tearDown() throws Exception {
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if (cluster != null) {
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cluster.shutdown();
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cluster = null;
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}
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}
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/**
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* Test that we cannot read a file beyond its snapshot length
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* when accessing it via a snapshot path.
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*
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*/
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@Test (timeout=300000)
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public void testSnapshotfileLength() throws Exception {
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hdfs.mkdirs(sub);
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int bytesRead;
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byte[] buffer = new byte[BLOCKSIZE * 8];
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FSDataInputStream fis = null;
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FileStatus fileStatus = null;
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// Create and write a file.
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Path file1 = new Path(sub, file1Name);
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DFSTestUtil.createFile(hdfs, file1, 0, REPLICATION, SEED);
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DFSTestUtil.appendFile(hdfs, file1, BLOCKSIZE);
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// Create a snapshot on the parent directory.
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hdfs.allowSnapshot(sub);
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hdfs.createSnapshot(sub, snapshot1);
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// Write more data to the file.
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DFSTestUtil.appendFile(hdfs, file1, BLOCKSIZE);
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// Make sure we can read the entire file via its non-snapshot path.
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fileStatus = hdfs.getFileStatus(file1);
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assertThat(fileStatus.getLen(), is((long) BLOCKSIZE * 2));
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fis = hdfs.open(file1);
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bytesRead = fis.read(0, buffer, 0, buffer.length);
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assertThat(bytesRead, is(BLOCKSIZE * 2));
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fis.close();
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// Try to open the file via its snapshot path.
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Path file1snap1 =
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SnapshotTestHelper.getSnapshotPath(sub, snapshot1, file1Name);
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fis = hdfs.open(file1snap1);
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fileStatus = hdfs.getFileStatus(file1snap1);
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assertThat(fileStatus.getLen(), is((long) BLOCKSIZE));
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// Make sure we can only read up to the snapshot length.
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bytesRead = fis.read(0, buffer, 0, buffer.length);
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assertThat(bytesRead, is(BLOCKSIZE));
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fis.close();
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}
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}
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