common/src/test/core/org/apache/hadoop/fs/TestFileSystemCaching.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 org.apache.hadoop.fs;

import static junit.framework.Assert.assertSame;
import static junit.framework.Assert.assertNotSame;

import java.net.URI;

import org.apache.hadoop.conf.Configuration;
import org.junit.Test;

public class TestFileSystemCaching {

  @Test
  public void testCacheEnabled() throws Exception {
    Configuration conf = new Configuration();
    conf.set("fs.cachedfile.impl", conf.get("fs.file.impl"));
    FileSystem fs1 = FileSystem.get(new URI("cachedfile://a"), conf);
    FileSystem fs2 = FileSystem.get(new URI("cachedfile://a"), conf);
    assertSame(fs1, fs2);
  }

  @Test
  public void testCacheDisabled() throws Exception {
    Configuration conf = new Configuration();
    conf.set("fs.uncachedfile.impl", conf.get("fs.file.impl"));
    conf.setBoolean("fs.uncachedfile.impl.disable.cache", true);
    FileSystem fs1 = FileSystem.get(new URI("uncachedfile://a"), conf);
    FileSystem fs2 = FileSystem.get(new URI("uncachedfile://a"), conf);
    assertNotSame(fs1, fs2);
  }

}