TestAttributes.java

/*
 * 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 hdfs.jsr203;

import static org.junit.Assert.assertNotNull;

import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.attribute.FileTime;
import java.util.Map.Entry;
import java.util.Set;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileUtil;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;

public class TestAttributes extends TestHadoop {

  private static MiniDFSCluster cluster;
  private static URI clusterUri;

  @BeforeClass
  public static void setUpBeforeClass() throws Exception {
    cluster = startMini(TestAttributes.class.getName());
    clusterUri = formalizeClusterURI(cluster.getFileSystem().getUri());
  }

  @AfterClass
  public static void teardownClass() throws Exception {
    if (cluster != null) {
      cluster.shutdown();
    }
  }

  private static MiniDFSCluster startMini(String testName) throws IOException {
    File baseDir = new File("./target/hdfs/" + testName).getAbsoluteFile();
    FileUtil.fullyDelete(baseDir);
    Configuration conf = new Configuration();
    conf.set(MiniDFSCluster.HDFS_MINIDFS_BASEDIR, baseDir.getAbsolutePath());
    MiniDFSCluster.Builder builder = new MiniDFSCluster.Builder(conf);
    MiniDFSCluster hdfsCluster = builder.clusterId(testName).build();
    hdfsCluster.waitActive();
    return hdfsCluster;
  }

  /**
   * Simple test to get all attributes.
   * 
   * @throws IOException
   */
  @Test
  public void testWriteBuffered() throws IOException {
    Path pathToTest = Paths.get(clusterUri);

    Set<String> sup = pathToTest.getFileSystem().supportedFileAttributeViews();

    for (String viewID : sup) {
      for (Entry<String, Object> item : Files
          .readAttributes(pathToTest, viewID + ":*").entrySet()) {
        assertNotNull(item.getKey());
      }
    }
  }

  /**
   * Simple test to get attributes.
   * 
   * @throws IOException
   */
  @Test
  public void testReadAttributes() throws IOException {
    Path pathToTest = Paths.get(clusterUri);

    // Read all basic-file-attributes.
    assertNotNull(Files.readAttributes(pathToTest, "*"));
    // Reads the file size, last modified time, and last access time
    // attributes.
    assertNotNull(Files.readAttributes(pathToTest,
        "size,lastModifiedTime,lastAccessTime"));
    // Read all POSIX-file-attributes.
    assertNotNull(Files.readAttributes(pathToTest, "posix:*"));
    // Reads the POSX file permissions, owner, and file size.
    assertNotNull(
        Files.readAttributes(pathToTest, "posix:permissions,owner,size"));
  }

  /**
   * Simple test to get attributes by string.
   * 
   * @throws IOException
   */
  @Test
  public void testReadAttribute() throws IOException {
    Path pathToTest = Paths.get(clusterUri);

    // Read all basic-file-attributes.
    assertNotNull(Files.getAttribute(pathToTest, "basic:creationTime"));
    assertNotNull(Files.getAttribute(pathToTest, "basic:fileKey"));
    assertNotNull(Files.getAttribute(pathToTest, "basic:isDirectory"));
    assertNotNull(Files.getAttribute(pathToTest, "basic:isRegularFile"));
    assertNotNull(Files.getAttribute(pathToTest, "basic:isSymbolicLink"));
    assertNotNull(Files.getAttribute(pathToTest, "basic:isOther"));
    assertNotNull(Files.getAttribute(pathToTest, "basic:lastAccessTime"));
    assertNotNull(Files.getAttribute(pathToTest, "basic:lastModifiedTime"));
    assertNotNull(Files.getAttribute(pathToTest, "basic:size"));
  }

  @Test
  public void testSetAttribute() throws IOException {
    Path pathToTest = Paths.get(clusterUri);

    Files.setAttribute(pathToTest, "basic:creationTime", FileTime.fromMillis(0));
    Files.setAttribute(pathToTest, "basic:lastAccessTime", FileTime.fromMillis(0));
    Files.setAttribute(pathToTest, "basic:lastModifiedTime", FileTime.fromMillis(0));
  }

  @Test(expected = IllegalArgumentException.class)
  public void testReadInvalidAttribute() throws IOException {
    Path pathToTest = Paths.get(clusterUri);

    // Read invalid attribute
    Files.getAttribute(pathToTest, "basic:isNotValid");
  }

  @Test(expected = IllegalArgumentException.class)
  public void testSetInvalidAttribute() throws IOException {
    Path pathToTest = Paths.get(clusterUri);

    // Set invalid attribute
    Files.setAttribute(pathToTest, "basic:isNotValid", "foo");
  }

  @Test(expected = UnsupportedOperationException.class)
  public void testReadAttributeAcl() throws IOException {
    Path pathToTest = Paths.get(clusterUri);

    // Read all basic-file-attributes.
    assertNotNull(Files.getAttribute(pathToTest, "acl:acl"));
  }
}