| /** |
| * 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.fs; |
| |
| import java.io.IOException; |
| import java.util.HashSet; |
| import java.util.Random; |
| import java.util.Set; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.test.GenericTestUtils; |
| import org.apache.log4j.Level; |
| |
| import static org.junit.Assert.*; |
| import org.junit.Test; |
| import org.junit.BeforeClass; |
| |
| /** |
| * This class tests the FileStatus API. |
| */ |
| public class TestListFiles { |
| static { |
| GenericTestUtils.setLogLevel(FileSystem.LOG, Level.ALL); |
| } |
| |
| static final long seed = 0xDEADBEEFL; |
| |
| final protected static Configuration conf = new Configuration(); |
| protected static FileSystem fs; |
| protected static Path TEST_DIR; |
| final private static int FILE_LEN = 10; |
| private static Path FILE1; |
| private static Path DIR1; |
| private static Path FILE2; |
| private static Path FILE3; |
| |
| static { |
| setTestPaths(new Path(GenericTestUtils.getTempPath("testlistfiles"), |
| "main_")); |
| } |
| |
| protected static Path getTestDir() { |
| return TEST_DIR; |
| } |
| |
| /** |
| * Sets the root testing directory and reinitializes any additional test paths |
| * that are under the root. This method is intended to be called from a |
| * subclass's @BeforeClass method if there is a need to override the testing |
| * directory. |
| * |
| * @param testDir Path root testing directory |
| */ |
| protected static void setTestPaths(Path testDir) { |
| TEST_DIR = testDir; |
| FILE1 = new Path(TEST_DIR, "file1"); |
| DIR1 = new Path(TEST_DIR, "dir1"); |
| FILE2 = new Path(DIR1, "file2"); |
| FILE3 = new Path(DIR1, "file3"); |
| } |
| |
| @BeforeClass |
| public static void testSetUp() throws Exception { |
| fs = FileSystem.getLocal(conf); |
| fs.delete(TEST_DIR, true); |
| } |
| |
| private static void writeFile(FileSystem fileSys, Path name, int fileSize) |
| throws IOException { |
| // Create and write a file that contains three blocks of data |
| FSDataOutputStream stm = fileSys.create(name); |
| byte[] buffer = new byte[fileSize]; |
| Random rand = new Random(seed); |
| rand.nextBytes(buffer); |
| stm.write(buffer); |
| stm.close(); |
| } |
| |
| /** Test when input path is a file */ |
| @Test |
| public void testFile() throws IOException { |
| fs.mkdirs(TEST_DIR); |
| writeFile(fs, FILE1, FILE_LEN); |
| |
| RemoteIterator<LocatedFileStatus> itor = fs.listFiles( |
| FILE1, true); |
| LocatedFileStatus stat = itor.next(); |
| assertFalse(itor.hasNext()); |
| assertTrue(stat.isFile()); |
| assertEquals(FILE_LEN, stat.getLen()); |
| assertEquals(fs.makeQualified(FILE1), stat.getPath()); |
| assertEquals(1, stat.getBlockLocations().length); |
| |
| itor = fs.listFiles(FILE1, false); |
| stat = itor.next(); |
| assertFalse(itor.hasNext()); |
| assertTrue(stat.isFile()); |
| assertEquals(FILE_LEN, stat.getLen()); |
| assertEquals(fs.makeQualified(FILE1), stat.getPath()); |
| assertEquals(1, stat.getBlockLocations().length); |
| |
| fs.delete(FILE1, true); |
| } |
| |
| |
| /** Test when input path is a directory */ |
| @Test |
| public void testDirectory() throws IOException { |
| fs.mkdirs(DIR1); |
| |
| // test empty directory |
| RemoteIterator<LocatedFileStatus> itor = fs.listFiles( |
| DIR1, true); |
| assertFalse(itor.hasNext()); |
| itor = fs.listFiles(DIR1, false); |
| assertFalse(itor.hasNext()); |
| |
| // testing directory with 1 file |
| writeFile(fs, FILE2, FILE_LEN); |
| itor = fs.listFiles(DIR1, true); |
| LocatedFileStatus stat = itor.next(); |
| assertFalse(itor.hasNext()); |
| assertTrue(stat.isFile()); |
| assertEquals(FILE_LEN, stat.getLen()); |
| assertEquals(fs.makeQualified(FILE2), stat.getPath()); |
| assertEquals(1, stat.getBlockLocations().length); |
| |
| itor = fs.listFiles(DIR1, false); |
| stat = itor.next(); |
| assertFalse(itor.hasNext()); |
| assertTrue(stat.isFile()); |
| assertEquals(FILE_LEN, stat.getLen()); |
| assertEquals(fs.makeQualified(FILE2), stat.getPath()); |
| assertEquals(1, stat.getBlockLocations().length); |
| |
| // test more complicated directory |
| writeFile(fs, FILE1, FILE_LEN); |
| writeFile(fs, FILE3, FILE_LEN); |
| |
| Set<Path> filesToFind = new HashSet<Path>(); |
| filesToFind.add(fs.makeQualified(FILE1)); |
| filesToFind.add(fs.makeQualified(FILE2)); |
| filesToFind.add(fs.makeQualified(FILE3)); |
| |
| itor = fs.listFiles(TEST_DIR, true); |
| stat = itor.next(); |
| assertTrue(stat.isFile()); |
| assertTrue("Path " + stat.getPath() + " unexpected", |
| filesToFind.remove(stat.getPath())); |
| |
| stat = itor.next(); |
| assertTrue(stat.isFile()); |
| assertTrue("Path " + stat.getPath() + " unexpected", |
| filesToFind.remove(stat.getPath())); |
| |
| stat = itor.next(); |
| assertTrue(stat.isFile()); |
| assertTrue("Path " + stat.getPath() + " unexpected", |
| filesToFind.remove(stat.getPath())); |
| assertFalse(itor.hasNext()); |
| assertTrue(filesToFind.isEmpty()); |
| |
| itor = fs.listFiles(TEST_DIR, false); |
| stat = itor.next(); |
| assertTrue(stat.isFile()); |
| assertEquals(fs.makeQualified(FILE1), stat.getPath()); |
| assertFalse(itor.hasNext()); |
| |
| fs.delete(TEST_DIR, true); |
| } |
| } |