FileSystemProxyTest.java

/*******************************************************************************
 *
 * Pentaho Big Data
 *
 * Copyright (C) 2002-2015 by Pentaho : http://www.pentaho.com
 *
 *******************************************************************************
 *
 * Licensed 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.pentaho.hadoop.shim.common.fs;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;

import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.junit.Test;
import org.pentaho.hadoop.shim.api.fs.Path;

public class FileSystemProxyTest {

  @Test( expected = NullPointerException.class )
  public void instantiation_null_delegate() {
    new FileSystemProxy( null );
  }

  private Configuration getLocalFileSystemConfiguration() {
    Configuration c = new Configuration();
    c.set( "fs.default.name", "file:///" );
    return c;
  }

  @Test
  public void getDelegate() throws IOException {
    FileSystem delegate = FileSystem.get( new Configuration() );
    FileSystemProxy proxy = new FileSystemProxy( delegate );
    assertEquals( delegate, proxy.getDelegate() );
  }

  @Test
  public void asPath_String() throws IOException, URISyntaxException {
    Configuration c = getLocalFileSystemConfiguration();
    FileSystem delegate = FileSystem.get( c );
    FileSystemProxy proxy = new FileSystemProxy( delegate );
    Path p = proxy.asPath( "/" );
    assertNotNull( p );
    assertEquals( new URI( "/" ), p.toUri() );
  }

  @Test
  public void asPath_Path_String() throws IOException, URISyntaxException {
    Configuration c = getLocalFileSystemConfiguration();
    FileSystem delegate = FileSystem.get( c );
    FileSystemProxy proxy = new FileSystemProxy( delegate );
    Path p = proxy.asPath( "/" );
    assertNotNull( p );
    assertEquals( new URI( "/" ), p.toUri() );

    Path test = proxy.asPath( p, "test" );
    assertNotNull( test );
    assertEquals( new URI( "/test" ), test.toUri() );
  }

  @Test
  public void asPath_String_String() throws IOException, URISyntaxException {
    Configuration c = getLocalFileSystemConfiguration();
    FileSystem delegate = FileSystem.get( c );
    FileSystemProxy proxy = new FileSystemProxy( delegate );
    Path p = proxy.asPath( "/", "test" );
    assertNotNull( p );
    assertEquals( new URI( "/test" ), p.toUri() );
  }

  @Test
  public void asPath_exists() throws IOException, URISyntaxException {
    Configuration c = getLocalFileSystemConfiguration();
    FileSystem delegate = FileSystem.get( c );
    FileSystemProxy proxy = new FileSystemProxy( delegate );
    assertTrue( proxy.exists( proxy.asPath( "/" ) ) );
  }

  @Test
  public void asPath_delete() throws IOException, URISyntaxException {
    Configuration c = getLocalFileSystemConfiguration();

    File tmp = File.createTempFile( FileSystemProxyTest.class.getSimpleName(), null );

    FileSystem delegate = FileSystem.get( c );
    FileSystemProxy proxy = new FileSystemProxy( delegate );
    Path p = proxy.asPath( tmp.getAbsolutePath() );
    assertTrue( proxy.exists( p ) );
    proxy.delete( p, true );
    assertFalse( proxy.exists( p ) );
    assertFalse( tmp.exists() );
  }
}