branch-0.23.1/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/conf/TestDeprecatedKeys.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.conf;

import java.io.ByteArrayOutputStream;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.CommonConfigurationKeys;

import junit.framework.TestCase;

public class TestDeprecatedKeys extends TestCase {
 
  //Tests a deprecated key
  public void testDeprecatedKeys() throws Exception {
    Configuration conf = new Configuration();
    conf.set("topology.script.file.name", "xyz");
    String scriptFile = conf.get(CommonConfigurationKeys.NET_TOPOLOGY_SCRIPT_FILE_NAME_KEY);
    assertTrue(scriptFile.equals("xyz")) ;
  }
  
  //Tests reading / writing a conf file with deprecation after setting
  public void testReadWriteWithDeprecatedKeys() throws Exception {
    Configuration conf = new Configuration();
    conf.setBoolean("old.config.yet.to.be.deprecated", true);
    Configuration.addDeprecation("old.config.yet.to.be.deprecated", 
	new String[]{"new.conf.to.replace.deprecated.conf"});
    ByteArrayOutputStream out=new ByteArrayOutputStream();
    String fileContents;
    try {
      conf.writeXml(out);
      fileContents = out.toString();
    } finally {
      out.close();
    }
    assertTrue(fileContents.contains("old.config.yet.to.be.deprecated"));
    assertTrue(fileContents.contains("new.conf.to.replace.deprecated.conf"));
  }
}