TestFileStatus.java
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- /**
- * 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 junit.framework.TestCase;
- import java.io.*;
- import java.util.Random;
- 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.fs.FSDataOutputStream;
- /**
- * This class tests the FileStatus API.
- */
- public class TestFileStatus extends TestCase {
- static final long seed = 0xDEADBEEFL;
- static final int blockSize = 8192;
- static final int fileSize = 16384;
- private static String TEST_ROOT_DIR =
- new Path(System.getProperty("test.build.data","/tmp"))
- .toString().replace(' ', '+');
-
- private void writeFile(FileSystem fileSys, Path name, int repl,
- int fileSize, int blockSize)
- throws IOException {
- // create and write a file that contains three blocks of data
- FSDataOutputStream stm = fileSys.create(name, true,
- fileSys.getConf().getInt("io.file.buffer.size", 4096),
- (short)repl, (long)blockSize);
- byte[] buffer = new byte[fileSize];
- Random rand = new Random(seed);
- rand.nextBytes(buffer);
- stm.write(buffer);
- stm.close();
- }
- private void checkFile(FileSystem fileSys, Path name, int repl)
- throws IOException {
- DFSTestUtil.waitReplication(fileSys, name, (short) repl);
- }
- /**
- * Tests various options of DFSShell.
- */
- public void testFileStatus() throws IOException {
- Configuration conf = new Configuration();
- MiniDFSCluster cluster = new MiniDFSCluster(conf, 1, true, null);
- FileSystem fs = cluster.getFileSystem();
- DFSClient dfsClient = new DFSClient(conf);
- try {
- //
- // check that / exists
- //
- Path path = new Path("/");
- System.out.println("Path : "" + path.toString() + """);
- System.out.println(fs.isDirectory(path));
- System.out.println(fs.getFileStatus(path).isDir());
- assertTrue("/ should be a directory",
- fs.getFileStatus(path).isDir() == true);
-
- // make sure getFileInfo returns null for files which do not exist
- FileStatus fileInfo = dfsClient.getFileInfo("/noSuchFile");
- assertTrue(fileInfo == null);
- // create a file in home directory
- //
- Path file1 = new Path("filestatus.dat");
- writeFile(fs, file1, 1, fileSize, blockSize);
- System.out.println("Created file filestatus.dat with one "
- + " replicas.");
- checkFile(fs, file1, 1);
- assertTrue(file1 + " should be a file",
- fs.getFileStatus(file1).isDir() == false);
- assertTrue(fs.getFileStatus(file1).getBlockSize() == blockSize);
- assertTrue(fs.getFileStatus(file1).getReplication() == 1);
- assertTrue(fs.getFileStatus(file1).getLen() == fileSize);
- System.out.println("Path : "" + file1 + """);
- // create an empty directory
- //
- Path parentDir = new Path("/test");
- Path dir = new Path("/test/mkdirs");
- assertTrue(fs.mkdirs(dir));
- assertTrue(fs.exists(dir));
- assertTrue(dir + " should be a directory",
- fs.getFileStatus(path).isDir() == true);
- assertTrue(dir + " should be zero size ",
- fs.getContentSummary(dir).getLength() == 0);
- assertTrue(dir + " should be zero size ",
- fs.getFileStatus(dir).getLen() == 0);
- System.out.println("Dir : "" + dir + """);
- // create another file that is smaller than a block.
- //
- Path file2 = new Path("/test/mkdirs/filestatus2.dat");
- writeFile(fs, file2, 1, blockSize/4, blockSize);
- System.out.println("Created file filestatus2.dat with one "
- + " replicas.");
- checkFile(fs, file2, 1);
- System.out.println("Path : "" + file2 + """);
- // verify file attributes
- assertTrue(fs.getFileStatus(file2).getBlockSize() == blockSize);
- assertTrue(fs.getFileStatus(file2).getReplication() == 1);
- // create another file in the same directory
- Path file3 = new Path("/test/mkdirs/filestatus3.dat");
- writeFile(fs, file3, 1, blockSize/4, blockSize);
- System.out.println("Created file filestatus3.dat with one "
- + " replicas.");
- checkFile(fs, file3, 1);
- // verify that the size of the directory increased by the size
- // of the two files
- assertTrue(dir + " size should be " + (blockSize/2),
- blockSize/2 == fs.getContentSummary(dir).getLength());
- } finally {
- fs.close();
- cluster.shutdown();
- }
- }
- }